Morphology Of Virus Ppt

PAPILLOMA VIRUSES Papilloma Viruses Characteristics dsDNA viruses (circular) Genone 8 kbp Genome associated with cellular histones Naked capsid Widespread in humans and other animals They cause ‘warts’ Some strains 16,18 and 31 associated with high risk of cervical cancer Over 100 types of HVP found so far Papilloma Viruses Different types infect different anatomical sites HPV-1 target. Note that the a number of alphaviruses (Ross River Virus, Chikungunya virus etc. 85: 1319–1325. The virus had a global economic impact with the Asian Development Bank recording losses of 59 billion USD [3]. Healthy people typically experience mild, cold-like symptoms and recover in a week or two. Cubic symmetry: The virus particle is icosahedral in shape (almost spherical particle ) and the nucleic acid contained inside the capsid. Figure 3:Routes of viral inoculation in embryonated egg. Morphology of Poliovirus: The poliovirus virion possesses icosahedral structure with 60 morphological units per virion, each unit consisting of four distinct viral proteins (VP1-VP4). nucleic acid free HBsAg particles); spherical, or filamentous; 40-48 nm in diameter, or 22 nm in diameter (for the HBsAg particles). Virus taxonomy in the age of metagenomics In the past, the approval of a new species by the ICTV was typically dependent on the availability of data that demonstrate the distinct biological. Morphology of Viruses ¥Structures of viruses of different families are separated into groups on the basis of ¥whether they are enveloped or nonenveloped ¥and whether there genome is RNA or DNA, ¥double-stranded or single-stranded Morphology of Viruses Different forms of viral RNA and DNA ¥RNA can be linear ÐSingle stranded ÐDouble stranded. Pathophysiology of the Influenza Virus One of the mechanisms is believed to be the inhibition of adrenocorticotropic hormone (ACTH) resulting in lowered cortisol levels. That is, viruses infect specific cells or tissues of specific hosts, or specific bacteria, or specific plants. Because of the large numbers of virus particles obtained it was possible to visualize what is probably the immature form of the virus. Marek’s Disease Virus (MDV) is a highly contagious viral infection that predominantly affects chickens but can also affect pheasants, quail, gamefowl and turkeys. T Lymphocyte Infected by HIV. Marburg virus is related to the Ebola virus in that both viruses belong to the filovirus family. The corolla comprises of variously coloured. Some viruses have more than one layer of protein surrounding the nucleic acid; still others have a lipoprotein membrane (called. Morphology: Most phages range in size from 24-200 nm in length. Morphology of bacterial cell deals with study of. Classification of Chikungunya Virus. IF staining is usually considered very rapid (about 1 to 2 hr) and overall gives a sensitive and specific viral identification [17-20]. Bacteria organized in units known as cells. Since it was first detected in New York City in 1999, and through 2004, 16,000 WNV disease cases have been reported in the United States. There are 29 different types of alphaviruses that cause diseases in humans and other mammals. Uncoating: Once inside the virus sheds its outer protein coat to release its genetic material and enzymes. ADVERTISEMENTS: Lysosome: Occurrence, Morphology, Functions and Origins! The concept of the lysosome originated from the development of cell fractionation techniques by which different sub-cellular components are isolated. This results in internal bleeding that can be life-threatening. Human Morphology is designed to bring authoritative information of clinic pathologic significance to human disease to the laboratory and clinical physician. •morphology and structure •Naked viruses( Non Enveloped ) •Replication •Pathogenicity •Transmission of Viruses •Virus Tissue Tropism •Acute Viral Infection •Viruses and Human Tumours •Bacteriophage •Sub-viral agents •Isolation of virus •Diagnosis. The histology of herpes infections is very distinctive. MORPHOLOGY OF POLIOVIRUS ⇒ Polio virus belongs to Enteroviru s genus of Picornaviridae ⇒ Polio virus is a Spherical, Enveloped virus, composed of 60 subunits, each consisting of four viral Proteins - VP1 - VP4, arranged in icosahedral symmetry. It is an enveloped virus – that is, the outer layer is a lipid membrane which is taken from the host cell in which the virus multiplies. ppt), PDF File (. com - id: 3c4fa4-N2JiN. This concept is very important in. com's free Morphology Viruses Medical PowerPoint Template now for your upcoming medical PowerPoint presentations. III - Microorganisms Important in Food Microbiology - Radomir Lasztity ©Encyclopedia of Life Support Systems (EOLSS). The symptoms and severity of food poisoning vary, depending on which bacteria or virus has contaminated the food. The three E monomers per icosahedral asymmetric unit do not have. Using an algae taxonomy based on the morphology of algae helps phycologists identify and classify specimens. Note - In this video I have mistakenly mentioned that viruses are unicellular in nature sorry for that. the form and structure of an organism or any of its parts. Immunofluorescence (IF) technique is widely used for rapid detection of virus infections by identifying virus antigens in clinical specimens [17-20]. Arenavirus infections are relatively common in humans in some areas of the world and can cause severe illnesses. These species of arboviruses have bee. Herpes Simplex Virus-1 strain. ⇒ HBV is the only hepatitis virus that contains DNA as genetic material. A rare variant of the disease may be seen in very young (neonatal) puppies is myocarditis (an inflammation of the heart muscle). Influenza viral filaments up to 30 μm in length were observed to form at high levels on surfaces of various polarized epithelial cell types infected with the A/Udorn/72 virus. Viruses (1) Eukaryotic microorganisms and viruses (WS 2010/2011) VIRUS (latin: poison) General term for all infectious agents! China 1000 B. Morphology of cytomegalovirus (salivary gland virus). (Baylor University College of Medicine, Houston, Texas) and Lucy Rasmussen. These hybrid particles, or ‘lipo-viro particles’ (LVPs), are rich in triglycerides, and contain the viral RNA, the capsid protein, E1E2 envelope glycoproteins and apolipoproteins B and E. Morphology of Viruses ¥Structures of viruses of different families are separated into groups on the basis of ¥whether they are enveloped or nonenveloped ¥and whether there genome is RNA or DNA, ¥double-stranded or single-stranded Morphology of Viruses Different forms of viral RNA and DNA ¥RNA can be linear ÐSingle stranded ÐDouble stranded. Lecture 2: Virus Structure All viruses contain the following two components: 1) a nucleic acid genome and 2) a protein capsid that covers the genome. This 8-page fact sheet written by Cameron Jack, Nathan Sperry, Ashley N. Influenza viral filaments up to 30 μm in length were observed to form at high levels on surfaces of various polarized epithelial cell types infected with the A/Udorn/72 virus. Basic Characteristics of Viruses You Need to Know 1. Mitochondrial morphology depends on the equilibrium between antagonistic fission and fusion forces acting on mitochondrial membranes. In this study, we investigated the abundance and diversity of single-stranded DNA (ssDNA) viruses in fecal samples from five healthy individuals through a combination of serial filtration and CsCl gradient ultracentrifugation. Attachment: Viral proteins on the capsid or phospholipid envelope interact with. A bacteriophage (/ b æ k ˈ t ɪər i oʊ f eɪ dʒ /), also known informally as a phage (/ f eɪ dʒ /), is a protein nanorobot that infects and replicates within bacteria and archaea. They therefore lack most of the components of cells, such as organelles, ribosomes, and the plasma membrane. Discuss why bacteria can be cultivated on synthetic media such as nutrient broth whereas viruses cannot. For example, prokaryotic cells lack a nucleus and other memorane‐bound structures known as organelles, while eukaryotic cells have both a nucleus and organelles. Some are icosahedral (20 sides) others are filamentous. Taking a look at viruses under the microscope. These forms are listed below with examples: zNaked icosahedral - adenoviruses and picornaviruses. Viruses that infect only bacteria are. Once inside the cell, the virus hijacks the cell’s assembly process, and makes thousands of copies of itself in hours. A few additional cases were reported in Africa in the following years, and, starting at the end of the 1960s, in equatorial Asia as well. four genes of structural proteins. In: Straus SE, moderator. This illness is different from a cold. This bacterium is difficult to staining but once stained, it becomes resistant to decolorization by diluted mineral acids this is the reason why Mycobacterium. To better understand Ebola, this infographic compares it to twelve other infectious…. A few years later, the virus was linked with fifth disease, a common rash childhood illness. The composition of a conventional virus can be described as follows. The Zika virus is a member of the Flavivirus genus in the family Flaviviridae. Prokaryotes and eukaryotes are distinguished on the basis of their cellular characteristics. Clinical and virological studies of patients with HSV conjunctivitis were carried out. (B) The lower edge of an intertidal mussel bed; mussels are visually un‐eroded with a shiny black/brown periostracum and a feeding ochre star (Pisaster ochraceus) is visible just below the lower limit of the mussel bed. Depending on the specific viral pathogen, commensal bacteria can promote or reduce the severity of viral infection and disease progression in their hosts. Thomsen2, F. Disease caused by virus 11. It is an enveloped virus possessing genome segmented into eight linear single- stranded molecules ranging in size from 890 to 2341 nucleotides. HEp-2 cells were exposed to nasal washes for 1 h, overlaid with methylcellulose and incubated for 5 d, then fixed and stained with hematoxylin and eosin. This printable Morphology Viruses editable Word template is available for easy to use. The head-tail morphology structure is unique to viruses that only infect bacteria and are known as bacteriophages. The virus causes a disease also commonly referred to as the "German Measles". Advanced Fertility Center of Chicago. Introduction Melaka virus 2006. morphology synonyms, morphology pronunciation, morphology translation, English dictionary definition of morphology. Since it was first detected in New York City in 1999, and through 2004, 16,000 WNV disease cases have been reported in the United States. Or the membrane (enveloped virus) can fuse with the membrane of the cell and slip in. If “atypical lymphocytes” are present, an infectious mononucleosis screening test and viral serology are indicated. The first structure of a flavivirus has been determined by using a combination of cryoelectron microscopy and fitting of the known structure of glycoprotein E into the electron density map. zNaked helical - tobacco mosaic virus; no known human or animal viruses have this structure. So few specimens of tissue from fatal cases of Ebola virus disease have been available for pathologic study that no description can be considered representative, and any analysis of pathogenetic mechanisms should be recognized as speculative. Some viruses have more than one layer of protein surrounding the nucleic acid; still others have a lipoprotein membrane (called. The hepatitis C virus (HCV) attacks the liver, leading to inflammation. ppt), PDF File (. Unlike other unicellular organisms like bacteria, viruses are commonly referred to as particles rather than cells. and Strain/type. Bacteria grow tremendously fast when supplied with an abundance of nutrients. Virus 178, virus 1816, and virus 341 did not alter NOR production, radial growth rate, or morphology of A. In humans, the major site of virus replication is the epithelial cells of the respiratory tract and about one-third of colds are caused by coronaviruses. Cowpea originated in Africa and is widely grown in Africa, Latin America, Southeast Asia and in the southern United States. However, their specific ultrastructural organisation has yet to be determined. How do viruses reproduce? they divide by mitosis sexually, by external fertilization replication outside the host inserting DNA into the host cell. CD4+ T Cells: Progressive depletion in numbers of circulating CD4+ T cells occurs in almost all cases of untreated HIV infection. Virus is a smallest infectious particle, Unicellular, Obligate Intracellular parasite. Keep reading to find the truth about the characteristics of viruses and the way they can act as both living and non-living things. Polio virus, Retro virus, Herpes virus, Adeno virus. Microorganisms and all other living organisms are classified as prokaryotes or eukaryotes. The cryo-EM structure also revealed that an asparagine amino acid on the surface of this protein is glycosylated. 8 kb in length • Physicochemical properties: Susceptible to inactivation by. A virion consists of a nucleic acid core, an outer protein coating or capsid, and sometimes an outer envelope made of protein and phospholipid membranes derived from the host cell. MODULE Morphology and General Properties of Fungi Microbiology 444 Notes Fig. Viruses are infectious agents with both living and nonliving characteristics. —The size and fine structure of cytomegalovirus was compared with that of herpes virus. ♦ Enveloped viruses too have a protein coat, but this capsid is encased within an outer lipid membrane. Members of the family Coronaviridae cause a broad spectrum of animal and human diseases. Virus - Virus - Size and shape: The amount and arrangement of the proteins and nucleic acid of viruses determine their size and shape. ♦ Non-enveloped viruses are surrounded by a protein coating, commonly referred to as a capsid. 1 g/ml, we detected heterogeneous structures that were most often spherical but. The major difference is that they have completely different cellular makeup. Bacteriophages are composed of proteins that encapsulate a DNA or RNA genome, and may have structures that are. It’s a type of virus called a flavivirus. The fruit may be defined as ripened ovary containing seeds. ppt), PDF File (. The normal morphology of sperm stored in direct contact with LN 2 for 1 week, 1 month, or 3 months was not significantly different from that of sperm cryopreserved in LN 2 vapor; Fig. Note the subconfluent monolayer of cells with the unoccupied surface and cell boundary and the condensed nuclear chromatin. World's Best PowerPoint Templates - CrystalGraphics offers more PowerPoint templates than anyone else in the world, with over 4 million to choose from. Ebola virus disease (EVD) is a rare and often-fatal infection caused by one of the five strains of the Ebola virus. 17+ (HSV-1) initially obtained from Dr. Flaviviruses are tiny structures made up of protein, RNA (a molecule related to DNA), and a lipid membrane. At a Glance. Influenza A virus is an enveloped virus with a segmented, single-strand, negative-sense RNA genome. Description Top of page. rubrum, grow very well on this medium and. Morphology The viruses of lineage A differ from all others in the genus in that they have an additional shorter spike-like protein called hemagglutinin esterase (HE) ( P15776 ). The cells of fungi have nuclei that contain the chromosomes and other organelles, such as m. Uniquely, replication of the RNA genome proceeds through the generation of a nested set of viral mRNA molecules. Virus: Viruses are considered as organic structures which interact with living organisms, rather than a living organism. Click play to see a 48 second video of sperm in a counting chamber for count and motility assessment. Cubic symmetry: The virus particle is icosahedral in shape (almost spherical particle) and the nucleic acid contained inside the capsid. Authors who wish to cite a section of the conference and specifically indicate its author may use this example for the form of reference: Cohen JI. Pedersen2, M. The study of animal viruses is important from a veterinary viewpoint and many of these viruses causes diseases that are economically devastating. [ May 6, 2020 ] 500 case based application level medical practice questions and explanations Case taking and Repertory [ May 6, 2020 ] Crude Cinchona to Potentized Vaccines: Pleasurable Journey of Homoeopathic healing agents Homeopathic Pharmacy. Virus obtained in this way mainly appeared in the form of large clumps. Wagner1 1DTU Cen, Center for Electron Nanoscopy, Technical University of Denmark 2Department of Molecular Biology and Genetics, Aarhus University Acknowledgments PIGVAC (2014-2018) is supported by Det Strategiske Forskningsråd. Scribd is the world's largest social reading and publishing site. pdf), Text File (. – Note-all animal viruses that are helical are enveloped, unlike many of the phage and plant viruses. Enveloped Viruses. (Baylor University College of Medicine, Houston, Texas) and Lucy Rasmussen. III - Microorganisms Important in Food Microbiology - Radomir Lasztity ©Encyclopedia of Life Support Systems (EOLSS). Hepatitis C is an infectious disease caused by a virus. 8 kb in length • Physicochemical properties: Susceptible to inactivation by. Cell Morphology Types. Although the three-dimensional (3D) architecture of thylakoid membranes has been reported previously, a 3D visualization of chloroplast under stress has not been explored. Members of the family Coronaviridae cause a broad spectrum of animal and human diseases. Diagram of coronavirus virion s 10. As unicellular eukaryotes, protozoa display all the same essential life activities as higher metazoan eukaryotes: they move about to survive, feed and breed. The genome encodes for 6 early proteins responsible for virus replication and 2 late proteins, L1 and L2, which are the viral structural proteins. Guy Schoehn PhD. Be effective with your business documentation by using our Morphology Viruses Word document template. The term was derived from "bacteria" and the Greek φαγεῖν (phagein), meaning "to devour". VP1 faces outside and carries the major antigenic site for combination with serotype specific neutralizing antibodies. Viral Morphology Viruses are acellular, meaning they are biological entities that do not have a cellular structure. Chair of Medical Biology, Microbiology, Virology, and Immunology STRUCTURE, CLASSIFICATION AND PHYSIOLOGY OF VIRUSES 2. ADVERTISEMENTS: Lysosome: Occurrence, Morphology, Functions and Origins! The concept of the lysosome originated from the development of cell fractionation techniques by which different sub-cellular components are isolated. 17+ (HSV-1) initially obtained from Dr. Structure of Measles Virus. There are 29 different types of alphaviruses that cause diseases in humans and other mammals. —The size and fine structure of cytomegalovirus was compared with that of herpes virus. Because the Ebola virus is so hazardous, it is classified as a biosafety level 4 agent - the level assigned to the most dangerous agents known. Virus particles are detected and identified on the basis of morphology. this is a series of presentations on microbiology: useful for undergraduate and paramedical students. The new DNA is then incorporated into the host cell. Background Retinal cotton wool spots (CWS) have long been associated with many systemic diseases, including diabetes mellitus and infection with the human immunodeficiency virus (HIV). Shape of bacteria. Systematic Veterinary Virology. These species of arboviruses have bee. The major difference is that they have completely different cellular makeup. The Morphology and Structure of Viruses. Endurance PhD. We can show that spine loss in the hippocampus after infection with neurotropic H7N7 (rSC35M) and non-neurotropic H3N2 (maHK68) in female C57BL/6 mice. Keywords: Human Papilloma virus, Cervical Cancer The Human Papillomavirus (HPV) strains 16 and 18 are the two most common HPV strains that lead to cases of genital cancer. A virion consists of a nucleic acid core, an outer protein coating or capsid, and sometimes an outer envelope made of protein and phospholipid membranes derived from the. A retrovirus is a type of RNA virus that inserts a copy of its genome into the DNA of a host cell that it invades, thus changing the genome of that cell. Size of Viruses. In the diagnostic setting, it is particularly valuable in the surveillance of emerging diseases and potential bioterrorism viruses. Morphology of Poliovirus 3. with a nucleocapsid of helical. Symmetry of viruses Viruses are divided into three groups, based on the morphology of the nucleocapsid and the arrangement of capsomeres. Phase variation in the colonial opacity of Streptococcus pneumoniae has been implicated as a factor in bacterial adherence, colonization, and invasion in the pathogenesis of pneumococcal disease. 85:1319–1325. A viral protein is an antigen specified by the viral genome that can be detected by a specific immunological response. Two hypotheses regarding the role of the placenta are possible: one is that the. The best studied TMV but many animal viruses and phage use this general arrangement. Herpes simplex virus keratitis is typically unilateral, and patients with bilateral involvement are often misdiagnosed. Ebola damages blood vessel walls and inhibits the blood from clotting. Discovery of Viruses. Nomenclature & classification of Plant Viruses Viruses are the entities whose genome is a nucleic acid, either DNA or RNA, which reproduce inside living cells and use their synthetic machinery to direct the synthesis of specialized particles, the virions which contain the viral genome and transfer it to other cells. Figure 1: Life cycle of Aedes aegypti: there is an aquatic phase (larvae, pupae) and a terrestrial phase (eggs, adults) Egg After taking a blood meal, female Aedes aegypti mosquitos produce on average 100 to 200 eggs per batch. The capsid does the job of attaching to host cells. In its infective form, outside the cell, a virus particle is called a virion. Once inside the cell, the virus hijacks the cell’s assembly process, and makes thousands of copies of itself in hours. Encapsulated strains of Haemophilus influenzae isolated from cerebrospinal fluid are coccobacilli, 0. The EV contains the plasma membrane envelope and glycoprotein (gp)64 necessary for virus entry by endocytosis. These organisms tend to reproduce and grow in groups, so instead of looking at each cell on its own, microbiologists study the arrangement of the cells. In the United States alone, approximately 25 to 50 million people contract influenza each year. Isolation in cell cultures is difficult and not practical for diagnostic use. Beijerinck (1897) coined the Latin name “virus” meaning poison for the substance infecting tobacco plants; Wendell Stanley (1935) crystallized sap from tobacco leaves infected with Tobacco Mosaic Virus (TMV) & found virus was made of nucleic acid & protein. morphology of horse. It is a lipid envelop that allows the virus to firmly stick to its. Perfect for acing essays, tests, and quizzes, as well as for writing lesson plans. HEp-2 cells were exposed to nasal washes for 1 h, overlaid with methylcellulose and incubated for 5 d, then fixed and stained with hematoxylin and eosin. The structure and composition of these components can vary widely. , 1999; Zaher, 1999). Herpes Simplex Virus-1 strain. The head-tail morphology structure is unique to viruses that only infect bacteria and are known as bacteriophages. The influenza virion (as the infectious particle is called) is roughly spherical. Size of bacteria. Related Videos. Based upon basic morphology, as indicated above, there are five different basic structural forms of viruses. The Picornaviridae family (picornaviruses) causes a wider range of illnesses than most other, if not all, virus families. Viral Replication: Basic Concepts • Viruses are obligate intracellular parasites • Viruses carry their genome (RNA or DNA) and sometimes functional proteins required for early steps in replication cycle • Viruses depend on host cell machinery to complete replication cycle and must commandeer that machinery to successfully replicate. There are three poliovirus serotypes: serotype 1, 2, and 3. The International Committee on Taxonomy of Viruses (ICTV) identifies Ebola virus as species Zaire ebolavirus, which is included into the genus Ebolavirus , family Filoviridae , order Mononegavirales. Most viruses either affect the boot sector, the system or the program files. hepatitis A), toga viruses (e. Morphology of Poliovirus 3. As viruses are obligate intracellular pathogens they cannot replicate without the machinery and metabolism of a host cell. Picornaviruses are small, ether- insensitive viruses with an RNA genome. Lets see Morphology and structure of viruses in detail. morphology of horse. Difference Between Bacteria and Virus Dependence on the Host for Reproduction. The most likely ecological reservoirs for SARS-CoV-2 are bats, but it is believed that the virus jumped the species barrier to humans from another intermediate animal host. Modes of horizontal transmission of viruses can be characterized as direct contact, indirect contact, common vehicle, airborne, vector-borne, iatrogenic, and nosocomial. The vast majority of transmission is horizontal, that is, between individuals within the population at risk. Author Summary Bovine viral diarrhea virus (BVDV) is the etiologic agent of mucosal disease and bovine viral diarrhea, two economically important diseases of the livestock. ) are termed the colony morphology. The morphology of influenza virions was found to depend on cellular determinants. Morphology of virus. Ebola first appeared in 1976 in a simultaneous outbreak in the areas that are. bacteria or virus. We can show that spine loss in the hippocampus after infection with neurotropic H7N7 (rSC35M) and non-neurotropic H3N2 (maHK68) in female C57BL/6 mice. In the United States, more than 3 million people have chronic HCV infection. A plasmid-based reverse genetics system was used to transfer the M segment of influenza A/Udorn/72 (H3N2) virus into influenza A/WSN/33 (H1N1) virus. These forms are listed below with examples: zNaked icosahedral - adenoviruses and picornaviruses. Morphology: Virions enveloped (with a detergent sensitive lipoprotein of 7 nm); slightly pleomorphic, or pleomorphic to pleomorphic and filamentous forms occur (most commonly, i. txt) or view presentation slides online. When acquired postnatally, the virus produces a mild illness with a characteristic rash. The Epstein - Barr Virus An introduction to one of the world s most common viruses Presented by: Mary Shvarts Shown here, Type 1 and Type 2 Downy cell, the common - A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow. A bacteriophage (/ b æ k ˈ t ɪər i oʊ f eɪ dʒ /), also known informally as a phage (/ f eɪ dʒ /), is a protein nanorobot that infects and replicates within bacteria and archaea. Cowpea originated in Africa and is widely grown in Africa, Latin America, Southeast Asia and in the southern United States. These particles were clumped by the addition of anti-HTLV-III-positive. ppt), PDF File (. Presentation Summary : Dengue (Break Bone Fever)Dengue virus is transmitted to humans by the biteof an infected mosquito. We provide unique informative PowerPoint presentation for marketers, presenters and educationists. The nucleic acid and proteins of each class of viruses assemble themselves into a structure called a nucleoprotein, or nucleocapsid. Start studying Microbiology powerpoint 2 bacterial morphology and structures. Paramyxoviruses are so called because they have an affinity for mucous membranes (Greek: myxa = mucus). Cubic symmetry: The virus particle is icosahedral in shape (almost spherical particle ) and the nucleic acid contained inside the capsid. It covers all aspects of peripheral blood and bone marrow morphology. Bacterial Morphology. canine rbc morphology. Members of this family share similar genome organization and replication strategies, but differ. Germ cell formation in Drosophila relies on polar granules, which are large ribonucleoprotein complexes found at the posterior end of the embryo. Mild illnesses include some cases of the common cold (which is caused also by certain other viruses, predominantly rhinoviruses), while more lethal varieties can cause SARS, MERS, and COVID-19. MORPHOLOGY OF POLIOVIRUS ⇒ Polio virus belongs to Enteroviru s genus of Picornaviridae ⇒ Polio virus is a Spherical, Enveloped virus, composed of 60 subunits, each consisting of four viral Proteins - VP1 - VP4, arranged in icosahedral symmetry. mentagrophytes unlike T. viruses; all are human pathogens. It’s a type of virus called a flavivirus. MURPHY Center for Disease Control, Atlanta, Georgia 30333, U. the year-to-year variation in influenza viruses and is the reason we need to keep changing the makeup of the influenza vaccine. cellular virus (EV), also called non-occluded virus (NOV) or budded virus (BV). The multipartite virus can affect both the boot sector and the program files at the same time,. 2 Colony Morphology Colony morphology is a method that scientists use to describe the characteristics of an individual colony of fungi growing on agar in a Petri dish. The porcine transmissible gastroenteritis virus (TGEV), bovine coronavirus (BCoV), and avian infectious bronchitis viruses (IBV) are important for veterinary studies, and the murine coronavirus mouse hepatitis virus (MHV) is studied as a model mechanism for human diseases [5]. Epstein-Barr virus infections: biology, pathogenesis, and management. There are inherent dangers in the use of any software available for download on the Internet. Ebola first appeared in 1976 in a simultaneous outbreak in the areas that are. giant clam morphology. Coronaviruses possess a distinctive morphology, the name being derived from the outer fringe, or “corona” of embedded envelope protein. Discuss why bacteria can be cultivated on synthetic media such as nutrient broth whereas viruses cannot. Coronaviruses cause respiratory and enteric disease in a variety of animals. Decisions on new names, which encapsulate the recognition of natural 'groups' of viruses, evolve slowly. Winner of the Standing Ovation Award for "Best PowerPoint Templates" from Presentations Magazine. Ebola virus disease (EVD) is a rare and often-fatal infection caused by one of the five strains of the Ebola virus. The branch of biology that deals with the form and structure of organisms without consideration of function. ⇒ HBV causes Type B hepatitis, the most widespread and the most important type of viral hepatitis. The three‐dimensional solution structure of the matrix protein from the type D retrovirus, the Mason–Pfizer monkey virus, and implications for the morphology of retroviral assembly Maria R. The Arenaviridae are a family of viruses whose members are generally associated with rodent-transmitted diseases in humans. Tony PhD, FMLSCN, LIBMS (UK) Department of Medical Laboratory Science, College of Medicine and Health Sciences, AfeBabalolaUniversity,Nigeria. Introduction. Virus 178, virus 1816, and virus 341 did not alter NOR production, radial growth rate, or morphology of A. For instance, m6A, m6Am, and 2′-O-me have been found to play important roles in the viral life cycle. These species of arboviruses have bee. Other intra-cellular structures such as plasmid,. Viruses possess unique infective properties and thus often cause disease in host organisms. Chloroplasts are multifunctional organelles whose morphology is affected by environmental stresses. Molecular biology of Epstein-Barr virus and its mechanism of B-cell transformation, pp 48-50. This figure shows three relatively complex virions: the bacteriophage T4, with its DNA-containing head group and tail fibers that attach to host cells; adenovirus, which uses spikes from its capsid to bind to the host cells; and HIV, which uses glycoproteins embedded in its envelope to do so. These species of arboviruses have bee. Learn about the history, types, and features of viruses. Epstein-Barr virus infections: biology, pathogenesis, and management. ⇒ HBV is the only hepatitis virus that contains DNA as genetic material. Coronaviruses are found in avian and mammalian species. The composition of a conventional virus can be described as follows. A virus consists of: RNA or DNA and a cell membrane RNA or DNA and a protein coat RNA and DNA and a protein coat proteins, cell membrane and RNA. morphology synonyms, morphology pronunciation, morphology translation, English dictionary definition of morphology. , metabolic studies, aging), the effects of drugs and toxic compounds on the cells,. Find your best ppt presentation from a pool of PowerPoint presentations stacked under important industry categories like business & management, heath & Wellness,eduction & training etc. 16-1 Growth is indicated by either death of embryo, embryo damage, or formation of pocks (lesions) on the egg membranes B. Ebola is the virus that causes Ebola virus disease. Three discrete cell morphotypes were identified using light microscopy. 85:1319–1325. Ebola virus is a class A bioterrorism agent, known to cause highly lethal hemorrhagic fever. Outline the events that lead to the formation of a plaque in a lawn of bacterial cells. Morphology of virus 1. In embryonated eggs Fig. This nucleic acid is either RNA or DNA but never both kinds simultaneously. Alphaviruses Coronaviruses Influenza Virology Segmented Double-stranded RNA Viruses Alphaherpesviruses. The three‐dimensional solution structure of the matrix protein from the type D retrovirus, the Mason–Pfizer monkey virus, and implications for the morphology of retroviral assembly Maria R. Hepatitis B Virus- Structure, Epidemiology, Symptoms, Pathogenesis, Diagnosis, Treatment and Vaccines. Morphology of Poliovirus 3. FREDERICK A. The morphology of icosahedral viruses ranges from highly spherical to highly faceted, and for some viruses a shape transition occurs during the viral life cycle. An understanding of the ontogeny, kinetics, and function of phagocytic cells in animals led to the concept of the mononuclear phagocyte system. Louping ill virus and tick-borne encephalitis virus provide another example of viruses where, despite their close genetic relationships and similar host ranges, they display different ecologies (moorlands versus forests), pathogenicities (red grouse, sheep/goats versus humans) and geographical distributions (UK versus Europe/Eurasia), thus. Structure of Measles Virus. Additionally, the synergistic effects of influenza A virus and S. Because of its induction during carbohydrate and complete starvation (incubation in tap water) and CdCl2 and bile salts stresses, one of these proteins (Gls24) was qualified as a “general stress protein” and was analyzed at the molecular level. (Baylor University College of Medicine, Houston, Texas) and Lucy Rasmussen. Authors who wish to cite a section of the conference and specifically indicate its author may use this example for the form of reference: Cohen JI. Influenza is a lipid-enveloped, pleomorphic virus. Microorganisms are single-celled creatures like bacteria, fungi or mold. 3m 43s Embed fonts. Cells are composed of a body protoplast , enclosed by a thin semi-permeable membrane , cytoplasm and a cell-wall. In the 1960's, studies of human coronaviruses were found to cause. Viral Morphology Viruses are acellular, meaning they are biological entities that do not have a cellular structure. The porcine transmissible gastroenteritis virus (TGEV), bovine coronavirus (BCoV), and avian infectious bronchitis viruses (IBV) are important for veterinary studies, and the murine coronavirus mouse hepatitis virus (MHV) is studied as a model mechanism for human diseases [5]. This printable Morphology Viruses editable Word template is available for easy to use. 4 x 10-2 base substitutions per site and year (s/s/y) and 7. an RNA virus. and Strain/type. Viruses Viruses can cause disease in humans, animals, plants, and even bacteria!. Morphology of virus 1. Some, like those of measles, are common, but many others are less well-recognized. bear skull morphology. bacteria or virus. Humans can become infected through direct or indirect contact with sick animals. Members of this family share similar genome organization and replication strategies, but differ. About 5 percent of the length of the virion is depicted. Despite being categorized as the simplest microbes, the characteristics of viruses are very distinct from other microorganisms. Microbiology refers to the study of microorganisms. Human viruses are found in all seven Baltimore groups, while plant and bacterial viruses are found only in a subset of groups. Viruses adsorb to their host cell surface via specific antireceptor molecules, often glycoproteins. Sperm Testing and Male Infertility Tests - check for low sperm count, motility and morphology with semen analysis. It can be used to make a presentation to describe the Zika disease symptoms and suggested treatments. When influenza virus is introduced into the respiratory tract, by aerosol or by contact with saliva or other respiratory secretions from an infected individual, it attaches to and replicates in epithelial cells. (B) The lower edge of an intertidal mussel bed; mussels are visually un‐eroded with a shiny black/brown periostracum and a feeding ochre star (Pisaster ochraceus) is visible just below the lower limit of the mussel bed. zNaked helical - tobacco mosaic virus; no known human or animal viruses have this structure. In humans, the major site of virus replication is the epithelial cells of the respiratory tract and about one-third of colds are caused by coronaviruses. Introduction to the Fungi. —The size and fine structure of cytomegalovirus was compared with that of herpes virus. The head encloses nucleic acid and acts as the protective covering. SUMMARY Electron microscopy, considered by some to be an old technique, is still on the forefront of both clinical viral diagnoses and viral ultrastructure and pathogenesis studies. The parasites may be microbes such as bacteria, virus and Mycoplasma, or animals such as liver fluke, worms, nematodes, some insects and plants such as Loranthus, Cuscuta etc. More often it is characterized by oral verrucous lesions that begin on. The icosahedrons particle is composed. Virtual Microbiology Classroom. HEp-2 cells were exposed to nasal washes for 1 h, overlaid with methylcellulose and incubated for 5 d, then fixed and stained with hematoxylin and eosin. Zika virus was discovered in Uganda in 1947. Taking a look at viruses under the microscope. Morphology: Virions enveloped (with a detergent sensitive lipoprotein of 7 nm); slightly pleomorphic, or pleomorphic to pleomorphic and filamentous forms occur (most commonly, i. This printable Morphology Viruses editable Word template is available for easy to use. Morphology of Wuchereria Bancrofti 3. com's free Morphology Viruses Medical PowerPoint Template now for your upcoming medical PowerPoint presentations. Size of bacteria. The normal morphology of sperm stored in direct contact with LN 2 for 1 week, 1 month, or 3 months was not significantly different from that of sperm cryopreserved in LN 2 vapor; Fig. Modes of horizontal transmission of viruses can be characterized as direct contact, indirect contact, common vehicle, airborne, vector-borne, iatrogenic, and nosocomial. This is an airborne infection and is transmitted through the nose and mouth. 18) is pleomorphic and its diameter is 80- 120 nm. Viruses adsorb to their host cell surface via specific antireceptor molecules, often glycoproteins. hepatitis A), toga viruses (e. Parainfluenza is a group of viruses that causes an infection in the respiratory system and closely resembles the common cold. Outline the events that lead to the formation of a plaque in a lawn of bacterial cells. MORPHOLOGY AND PHYSIOLOGY OF VIRUSES a. The hepatitis B virus (HBV) is a virus of the hepadnavirus family that causes hepatitis B, an infection of the liver. Classification of Chikungunya Virus. 3 BACTERIA The major characteristics of Bacteria are based on their size, shape and arrangements 1. Download Hi-Res Image Download to MS-PowerPoint Cite This: Langmuir 2007 23 22 11157-11163. The bacteriophage uses its tail to attach to the bacterium, creates a hole in the cell wall, and then inserts its DNA into the cell using the tail as a channel. PAPILLOMA VIRUSES Papilloma Viruses Characteristics dsDNA viruses (circular) Genone 8 kbp Genome associated with cellular histones Naked capsid Widespread in humans and other animals They cause ‘warts’ Some strains 16,18 and 31 associated with high risk of cervical cancer Over 100 types of HVP found so far Papilloma Viruses Different types infect different anatomical sites HPV-1 target. American Museum of Natural History 200 Central Park West New York, NY 10024-5102 Phone: 212-769-5100 Open daily from 10 am - 5:45 pm except on Thanksgiving and Christmas. Morphology of Viruses 151 Table 30. Size of bacterial cell is less than 3 micrometer. The first structure of a flavivirus has been determined by using a combination of cryoelectron microscopy and fitting of the known structure of glycoprotein E into the electron density map. Figure 1: Life cycle of Aedes aegypti: there is an aquatic phase (larvae, pupae) and a terrestrial phase (eggs, adults) Egg After taking a blood meal, female Aedes aegypti mosquitos produce on average 100 to 200 eggs per batch. As unicellular eukaryotes, protozoa display all the same essential life activities as higher metazoan eukaryotes: they move about to survive, feed and breed. , in a shower or air conditioning system) and inhaled, resulting in a type of pneumonia known as Legionnaires disease. We have investigated the effect of the interfacial interaction on the cross-sectional morphology of the tobacco mosaic virus (TMV) in solution and on two types of solid substrates, SiOx (polar) on Si(100) and polystyrene film (nonpolar) on Si. It is an enveloped virus – that is, the outer layer is a lipid membrane which is taken from the host cell in which the virus multiplies. The vast majority of transmission is horizontal, that is, between individuals within the population at risk. The scanning electron microscope (SEM) uses a focused beam of high-energy electrons to generate a variety of signals at the surface of solid specimens. 18) is pleomorphic and its diameter is 80- 120 nm. The virus had a global economic impact with the Asian Development Bank recording losses of 59 billion USD [3]. , in a shower or air conditioning system) and inhaled, resulting in a type of pneumonia known as Legionnaires disease. It is related to dengue, yellow fever, West Nile and Japanese encephalitis, viruses that are also members of the virus family Flaviviridae. In contrast, virions produced by nonpolarized cell types infected with this virus were almost exclusively of spherical morphology. HBV is generally transmitted between people through bodily fluids, such as. Size of bacteria. Cell Morphology Types. This concept is very important in. Viral Replication: Basic Concepts • Viruses are obligate intracellular parasites • Viruses carry their genome (RNA or DNA) and sometimes functional proteins required for early steps in replication cycle • Viruses depend on host cell machinery to complete replication cycle and must commandeer that machinery to successfully replicate. Morphology of cytomegalovirus (salivary gland virus). This review highlights new information regarding the virology, clinical. morphology of different viruses. Prevention without knowledge of the agent, based on recognition that survivors of smallpox were subsequently protected against disease Inoculation of healthy individuals with dry material from. These particles were clumped by the addition of anti-HTLV-III-positive. Nomenclature & classification of Plant Viruses Viruses are the entities whose genome is a nucleic acid, either DNA or RNA, which reproduce inside living cells and use their synthetic machinery to direct the synthesis of specialized particles, the virions which contain the viral genome and transfer it to other cells. Most infections become chronic, as the body is unable to get rid of the virus. Ebola Virus Hemorrhagic Fever Outbreaks 1976- First Major Outbreak (ZEBOV) 1976- Sudan (SEBOV) Occur Sporadically www. The virus is much simpler than the bacterial cell, consisting of a core of nucleic acid--either deoxyribonucleic acid (DNA) or ribonucleic acid (RNA)--enclosed in a protective membrane of protein (called the capsid). Systematic Veterinary Virology. Exanthems in children are most often related to viral infections. Virus Classification And Description Classification Parameters Several Parameters Are Used for Classification Viral classification study is referred to as Taxonomy 73 families exist so far!! Type of genomic nucleic acid Size of virion and genome Capsid structure Host Replication mechanism Size of Viruses Ranges of sizes 20 nm to 500 nm. When protomeres aggregate into units of five or six (capsomeres) and then condense to form a geometric figure having 20 equal triangular faces and 12 apices, the virus is said to have icosahedral (cubic) morphology. zNaked helical - tobacco mosaic virus; no known human or animal viruses have this structure. In viruses either DNA or RNA is present. The Structure and Morphology of Infectious Agent The HIV belongs to the genus Lentivirus and the family Retroviridae. They range in size from 20 to 300 nm (lnm = one billionth ofa meter). —The size and fine structure of cytomegalovirus was compared with that of herpes virus. Morphology Viruses ppt template can also be used for topics like filovirus,helical,complex,bacteria,herpes,envelope,human,common cold, etc. 85: 1319-1325. Sperm Testing and Male Infertility Tests - check for low sperm count, motility and morphology with semen analysis. Two hypotheses regarding the role of the placenta are possible: one is that the. The EV contains the plasma membrane envelope and glycoprotein (gp)64 necessary for virus entry by endocytosis. Like its relatives, Zika virus is mainly transmitted to humans through the bite of infected Aedes aegypti mosquitoes. reviewing the classification and nomenclature of viruses. These bacteria may be spherical,cylindrical or spiral in shape. They are the smallest kind of microbe, with the size ranging from around 20-200 nanometers, around 35 times smaller than a human red blood cell and around 100th the size of a regular bacteria. 8 um, similar in morphology to Bordetella pertussis, the agent of whooping cough. Fungi Types, Morphology & Structure, Uses and Disadvantages. 85:1319–1325. Members of the family Coronaviridae cause a broad spectrum of animal and human diseases. Taï Forest virus (TAFV) has caused a single case of severe but nonlethal human disease, whereas Reston virus (RESTV) has thus far only caused inapparent human infections. Many animal viruses are also important from a human medical perspective. • Predictions about replication, pathogenesis • More than 1,550 virus species belonging to 3 orders, 56 families, 9 subfamilies and 233 genera are recognized by the ICTV. Epstein-Barr virus is a gamma-group herpes virus that causes Infectious Mononucleosis a benign, self-limited lymphoproliferative disease that is characterized by fever,generalized lymphadenopathy, splenomegaly, sore throat and appearance in the blood of atypical activated T-lymphocytes. incubation period) was also determined. A seven-credit-hour, fall semester, second-year course covering fundamental and clinical aspects of microbiology and immunology as they relate to bacteria, viruses, fungi and parasites. 16-1 Growth is indicated by either death of embryo, embryo damage, or formation of pocks (lesions) on the egg membranes B. Learn exactly what happened in this chapter, scene, or section of Viruses and what it means. Members of the family Coronaviridae cause a broad spectrum of animal and human diseases. Chair of Medical Biology, Microbiology, Virology, and Immunology STRUCTURE, CLASSIFICATION AND PHYSIOLOGY OF VIRUSES 2. Numerous pathogens, including viruses, fungi, protozoa, nematodes, and a bacterium have been associated with fall armyworm (Gardner et al. There's no evidence that anthrax is transmitted from person to person, but it's possible that anthrax skin lesions may be. All vervet males and females are sexually dimorphic and wild adult males weigh between 3. The form taken by a cell line reflects the tissue from which it was derived. 6 is accurate, complete, virus free or do not infringe the rights of any third party. gov for more information Where does Ebola hide? 2002- Fruit Bats Antibodies against Ebola Ebola Gene sequences in liver and spleen Fruit bats do not show any symptoms Best candidate to be the reservoir More research needs to be done Geography The link between human. reviewing the classification and nomenclature of viruses. Chikungunya is caused by the chikungunya virus (CHIKV), an arthropod-borne virus (arbovirus). Anthrax is a rare but serious illness caused by a spore-forming bacterium, Bacillus anthracis. Morphology is the study of the internal structure of words and forms a core part of linguistic study today. Influenza is a lipid-enveloped, pleomorphic virus. Slide 4: Gram + Gram - Cell wall Cell (inner) membrane Outer membrane Ribosomes Granule Cell wall Nucleoid Cell membrane Capsule Flagellum Pili Gram, C. Patil Dental College and Hospital, DPU Pimpri, Pune, India. Taxonomy Family: Filoviridae (1) Genus: Marburgvirus Species: (a) Lake Victoria marburgvirus (2) Genus: Ebolavirus Species: (a) Ivory Coast ebolavirus (b) Reston ebolavirus (c) Sudan ebolavirus (d) Zaire virus. Introduction. Introduction; Herpesviridae is the name of a family of enveloped, double-stranded DNA viruses with relatively large complex genomes. When several organisms are cultivated, the morphology of the. Virus particles contains either DNA or RNA (not both) Nucleic Acid is surrounded or coated by a protein shell (capsid) Some viruses possess a membrane-like envelope surrounding the particle …General features of Viruses …General Properties of viruses Consists of 1 molecule of DNA or RNA enclosed in coat of protein May have additional layers. Cytomegalovirus stains as a DNA virus and is almost identical in size to herpes virus. Human papillomavirus (HPV) is a small, non-enveloped deoxyribonucleic acid (DNA) virus that infects skin or mucosal cells. Measles virus is a typical paramyxovirus (spherical enveloped particles that contain a non segmented negative strand RNA genome. - This is then surrounded by a protein coat (capsid) which is then (often) surrounded by a membrane (mostly protein & carbohydrates). FRE 2854 CNRS‐Université Joseph Fourier, Laboratoire. Author Summary Bovine viral diarrhea virus (BVDV) is the etiologic agent of mucosal disease and bovine viral diarrhea, two economically important diseases of the livestock. Virus is a smallest infectious particle, Unicellular, Obligate Intracellular parasite. The nucleoid is surrounded by a membrane and two lateral bodies of unknown function. In this lecture we describe the two major forms of symmetry for building virus particles, helical and. The icosahedrons particle is composed. The helical structure of the rigid tobacco mosaic virus rod. The virus appears to be relatively refractory to the antiviral effects of interferon , but the mechanism is unknown. Viruses are the smallest infectious agents of animal and plant tissues. T4 is among the largest phages; it is approximately 200 nm long and 80-100 nm wide. bacteria: morphology and classification - Free download as Powerpoint Presentation (. When both fusion and fission are simultaneously inactivated, the loss of mtDNA is alleviated, along with mitochondrial fragmentation. Characters of Viruses. Requirements Low sensitivity and specificity - may be enhanced by IEM Analysis based on morphology only. These bacteria may be spherical,cylindrical or spiral in shape. Microbiology refers to the study of microorganisms. Smallest infectious agent (20nm to 300 nm)smallest RNA virus Picornavirussmallest DNA virus Parvoviruslargest virus Poxvirus. The most obvious difference between members of viral families is their morphology,. In infected people, it causes a range of illnesses from asymptomatic (subclinical) infection to acute respiratory illness and fatal encephalitis. The symptoms are similar to those of rhinovirus colds (runny nose, sore throat, cough, headache, fever, chills. • Measles Virus (MV) Disease Agent Characteristics: • Family: Paramyxoviridae; Genus: Morbillivirus • Closely related to canine distemper virus and rinderpest virus • Morphology: enveloped, pleomorphic spheres 100-300 nm diameter. In the diagnostic setting, it is particularly valuable in the surveillance of emerging diseases and potential bioterrorism viruses. This phenomena is predicted from continuum elasticity, via the buckling transition theory by Nelson (Phys. Discuss why bacteria can be cultivated on synthetic media such as nutrient broth whereas viruses cannot. The three E monomers per icosahedral asymmetric unit do not have. ♦ Enveloped viruses too have a protein coat, but this capsid is encased within an outer lipid membrane. Within each genotype the virus isolates can exhibit up to 20 % variability of nucleotide sequences resulting from random mutation (RNA polymerase infidelity) and recombination. It is a highly contagious respiratory disease caused by one of many Influenza A viruses. Pathogenesis of influenza in humans. For instance, m6A, m6Am, and 2′-O-me have been found to play important roles in the viral life cycle. There is no evidence, however, that human coronaviruses can be transmitted by animals. Modern study of mammalian phagocytes began with Metchnikoff in the 19th century. Enveloped Viruses. txt) or view presentation slides online. , 2011 , Sanchez. nidulans non-IRT strains (Fig. The Zika virus surface is similar to that of dengue and related viruses at the near-atomic level, researchers found, but with a notable difference. Presentation Summary : Dengue (Break Bone Fever)Dengue virus is transmitted to humans by the biteof an infected mosquito. An average cylindrical bacterial cell measures 3μ long and 1μ broad whereas an average spherical cell is 1μ in diameter. Peak release of extracel-lular virus occurs 18 to 36 h after infection. Some viruses have more than one layer of protein surrounding the nucleic acid; still others have a lipoprotein membrane (called. For example, the virus can be taken in by a process like phagocytosis. Mycobacterium tuberculosis Morphology/Structure The structure of Mycobacterium Tuberculosis when viewed under the microscope shows slender rods (this why they are called Bacilli rods). (Baylor University College of Medicine, Houston, Texas) and Lucy Rasmussen. Note the subconfluent monolayer of cells with the unoccupied surface and cell boundary and the condensed nuclear chromatin. four genes of structural proteins. The members of this group share a unique development cycle, a common morphology and a common family antigen. The histology of herpes infections is very distinctive. In: Straus SE, moderator. Three discrete cell morphotypes were identified using light microscopy. The disease most often strikes in pups between six and 20 weeks old, but older animals are sometimes also affected. Background Retinal cotton wool spots (CWS) have long been associated with many systemic diseases, including diabetes mellitus and infection with the human immunodeficiency virus (HIV). Like its relatives, Zika virus is mainly transmitted to humans through the bite of infected Aedes aegypti mosquitoes. SUMMARY Electron microscopy, considered by some to be an old technique, is still on the forefront of both clinical viral diagnoses and viral ultrastructure and pathogenesis studies. The characteristics of a colony (shape, size, pigmentation, etc. Method of transmission of virus VI. Ebola Classification and Taxonomy Ebola Sudan, Ebola Zaire, Ebola Cote d'Ivoire, and Ebola Reston are the four known strains (subtypes) of Ebola. We can show that spine loss in the hippocampus after infection with neurotropic H7N7 (rSC35M) and non-neurotropic H3N2 (maHK68) in female C57BL/6 mice. In particular, they can affect the structure of the virus, replication, innate immune response, and innate sensing pathways. The inner. Louping ill virus and tick-borne encephalitis virus provide another example of viruses where, despite their close genetic relationships and similar host ranges, they display different ecologies (moorlands versus forests), pathogenicities (red grouse, sheep/goats versus humans) and geographical distributions (UK versus Europe/Eurasia), thus. Hepatitis B Virus- Structure, Epidemiology, Symptoms, Pathogenesis, Diagnosis, Treatment and Vaccines. Today we’ll start with the basic structure of influenza virus, illustrated above. oldest classificaiton: disease caused; (hard because viruses can cause more than one disease), , so formed ICTV), based on: nucleic acid type, strategy for replication, morphology virus is genus viridae is family, and order names end in ales. A few years later, the virus was linked with fifth disease, a common rash childhood illness. West Nile virus (WNV) causes epidemics of febrile illness, meningitis, encephalitis, and flaccid paralysis. Antigen-antibody complexes were used to define and display rubella virus by means of electron microscopy. Virus is a minute nucleoprotien particle consist of a central core of nucleic acid and protienaceous coat which sround the nucleic acid. Microscopic organisms can have one or more flagella masterminded in bunches or spread everywhere throughout the cell. The chlamydia, which are incorrectly called the PLT viruses or Bedsonia or basophilic viruses, are bacteria which are obligate intracellular parasites of higher animals (mammals and birds). We report the first case of tuberculosis caused by “ Mycobacterium canettii ” recognized in the United States. Wagner1 1DTU Cen, Center for Electron Nanoscopy, Technical University of Denmark 2Department of Molecular Biology and Genetics, Aarhus University Acknowledgments PIGVAC (2014-2018) is supported by Det Strategiske Forskningsråd. This results in internal bleeding that can be life-threatening. To replicate themselves, viruses usurp functions of the host cells on which they are parasites. This intermediate animal host could be a domestic food animal, a wild animal, or a domesticated wild animal which has. Virus isolation: Hepatitis A Virus can be grown in human simian cell cultures. Virus is a smallest infectious particle, Unicellular, Obligate Intracellular parasite. com's free Morphology Viruses Medical PowerPoint Template now for your upcoming medical PowerPoint presentations. In our initial experiments, we studied the morphology of Jc1 wild type virus after purification by ultracentrifugation by using negative staining and transmission electron microscopy (supplemental Fig. Klebsiella pneumoniae is a Gram-negative, non-motile, encapsulated, lactose fermenting, facultative anaerobic, rod shaped bacterium found in the normal flora of the intestines. Structure of viruses – It consist of Capsid , nucleic acid and envelop. A few years later, the first case of Middle Eastern Respiratory Syndrome (MERS-CoV) was found and documented in Saudi Arabia. The poxviruses are large, complex viruses that have an unusual morphology. with a nucleocapsid of helical. Knowing which genes are carried by a particular strain can help predict how well it will infect humans and how severe this infection will be (that is, predict the strain's. Symmetry of viruses Viruses are divided into three groups, based on the morphology of the nucleocapsid and the arrangement of capsomeres. ppt morphology. These bacteria may be spherical,cylindrical or spiral in shape. RNA type viruses, such as COVID-19, show strong associations with RNA modifications. Parainfluenza. 2A and C and see Fig. Polio virus, Retro virus, Herpes virus, Adeno virus. The virus causes a disease also commonly referred to as the "German Measles". The epidemiology and pathogenesis of Ebola virus disease will be presented here, including knowledge that emerged during and after the West African epidemic of Ebola virus disease. Adsorption is generally temperature and energy independent. Background about male fertility and sperm problems. Different types of bacteria will produce different-looking colonies, some colonies may be colored, some colonies are circular in shape, and others are irregular. There's no evidence that anthrax is transmitted from person to person, but it's possible that anthrax skin lesions may be. Arenavirus infections are relatively common in humans in some areas of the world and can cause severe illnesses. Specimens of bone marrow trephine biopsy (BMT) are transported and fixed in acetic acid–zinc–formalin fixative, decalcified in 10% formic acid–5% formaldehyde and processed with other specimens to paraffin-wax embedding. Get the facts on the history, symptoms, and treatment of Marburg virus disease, formerly known as Marburg hemorrhagic fever. These hybrid particles, or ‘lipo-viro particles’ (LVPs), are rich in triglycerides, and contain the viral RNA, the capsid protein, E1E2 envelope glycoproteins and apolipoproteins B and E. gov for more information Where does Ebola hide? 2002- Fruit Bats Antibodies against Ebola Ebola Gene sequences in liver and spleen Fruit bats do not show any symptoms Best candidate to be the reservoir More research needs to be done Geography The link between human. INTRODUCTION Papillomatosis is a benign and opportunistic tumor, mediated by a virus of the Papillomavirus genus, which affects dogs, especially puppies. The disease is spread among. MICROBIOLOGY PPT LECTURES Microbiology Lecture Notes - Set 1 Introduction to Microbiology Microbial Cell Ultrastructure and Function Standard Growth Conditions and Measurement of Growth Unusual Growth Conditions/How's a Bug to Survive? Basic Microbial Metabolism Microbial Metabolism--Mechanisms for Procuring Energy Anabolism Exchange of Genetic Material Immunology: All you wanted to know but. )are usually transmitted via mosquitoes and hence is known as Arboviruses (Anthropod Borne Viruses). The symptoms are similar to those of rhinovirus colds (runny nose, sore throat, cough, headache, fever, chills. Once inside the host cell's cytoplasm, the virus uses its own reverse transcriptase enzyme to produce DNA from its RNA genome, the reverse of the usual pattern, thus retro (backwards). Encapsulated strains of Haemophilus influenzae isolated from cerebrospinal fluid are coccobacilli, 0. Fungi Types, Morphology & Structure, Uses and Disadvantages. The TYLCV capsid (total MW 3,330,000), like that of other geminiviruses (Zhang et al. 4 Derivational morphology 2. Size of bacterial cell is less than 3 micrometer. The Zika virus surface is similar to that of dengue and related viruses at the near-atomic level, researchers found, but with a notable difference. Chikungunya is a member of the Alphavirus genus in the family Togaviridae. FREDERICK A. * The Size and Morphology of Selected Viruses Figure 5. The head of the virus has an icosahedral shape with a helical shaped tail. Bacteria: Bacteria are living organisms. Although you have now studied various groups of plants and algae, as well as other eukaryotic organisms, in other courses, you will find that the fungi are probably the least understood among the eukaryotes. ppt), PDF File (. Despite the common occurrence of tumor viruses in animals, only a few viruses are associated with human tumors, and evidence that they are truly the causative agents exists for very few. Coevolution The term coevolution is used to describe cases where two (or more) species reciprocally affect each other's evolution. These organisms tend to reproduce and grow in groups, so instead of looking at each cell on its own, microbiologists study the arrangement of the cells. Note the subconfluent monolayer of cells with the unoccupied surface and cell boundary and the condensed nuclear chromatin. A seven-credit-hour, fall semester, second-year course covering fundamental and clinical aspects of microbiology and immunology as they relate to bacteria, viruses, fungi and parasites. Scribd is the world's largest social reading and publishing site.