Classification of viruses slideshare. This document discusses the classification of viruses.

Classification of viruses slideshare Category III viruses have double-stranded RNA genomes and This document discusses the classification of microorganisms. There are approximately 80 known arboviruses that cause human disease. ’d • The nucleocapsid of many viruses is surrounded by an envelope • Viruses with no envelopes are called naked viruses • The outer layer of the virus envelope may contain surface spikes or projections called glycoproteins • The envelope of the virus is derived from the host cell membrane when the virus is exiting the cell via budding, and the infectivity This document provides information about plant virus taxonomy and classification. The document Viruses affecting man; entymology; definition; classification; virus structure; genetics Download as PPT, PDF 0 likes 0 views The document details a seminar on plant and animal viruses, highlighting various topics including definitions, structures, classifications, and specific examples like the Tobacco Mosaic Virus (TMV) and SV40 virus. It then discusses the history of virus classification committees and outlines the current hierarchical classification system used, with seven orders The document details the study of pharmaceutical microbiology, focusing on the morphology, classification, and replication of viruses, which are acellular infectious agents reliant on host cells for reproduction. Poxviruses replicate in the cytoplasm and have complex virion structures This document discusses various systems for classifying viruses. It begins by outlining learning objectives about plant virus infections, life cycles, transmission, structures, classification, replication, symptoms, identification, and control. Subtopics included are: *History *Structure and Composition (Viral capsid, Viral envelope, Viral Nucleic Acid) *Classification of Viruses (based on the presence of nucleic acid, based on the structure or symmetry, based on the site of replication, based on the host range) *Bacteriophage (size, structure) *Replication of Bacteriophages (Lytic cycle 1) Viruses are non-living infectious particles that contain genetic material and a protein coat called a capsid. The lecture further explains the cultivation 1. Viruses have a capsid or envelope and replicate only inside living cells. It describes the differences between bacteria and viruses, and between DNA and RNA viruses. This document provides an overview of viruses, viroids, and prions. Each group has specific characteristics, such as replication locations and mechanisms, with notable This document discusses virus taxonomy and classification. The learning outcomes are listed as classifying microorganisms and describing the characteristics of viruses, bacteria, protozoa, algae, and This document discusses RNA viruses. It discusses the general characteristics of viruses, including their small size, obligate intracellular parasitism, and nucleic acid genomes. The viral Oncogenic viruses are viruses that can cause cancer. It begins by defining viruses as acellular microbes that rely on host cells for replication. Viruses are non-cellular particles that contain genetic material and invade living cells. 3) Viruses exist in two states - as active viruses when infecting a host cell, or dormant virions when not in contact with a host. Additionally, it This document provides information on the classification and nomenclature of different virus groups. The course aims to provide comprehensive knowledge of medically important The document discusses the characteristics and structure of viruses, highlighting their lack of cellular organization, smaller size compared to bacteria, and dependence on host cells for replication. New viral particles assemble and exit the cell The document provides an overview of virus morphology, classification, reproduction, and cultivation, highlighting key historical milestones in virology and the structural characteristics of viruses. Their structure includes nucleic acids, a protein capsid, and some have The document discusses viral oncogenesis and viruses associated with human tumors. It aims to develop and maintain a universal virus taxonomy. The ICTV system organizes viruses into orders, families, subfamilies, genera and species This document discusses virus classification systems. The document then examines the structure of viruses and how bacteria viruses and animal viruses replicate through lytic and lysogenic The Baltimore classification of viruses, developed by David Baltimore, categorizes viruses into seven groups based on their genome types and replication methods, including double-stranded DNA, single-stranded DNA, double-stranded RNA, and single-stranded RNA (both positive and negative sense). Prince C P - Download as a PDF or view online for free This document discusses various food borne diseases including their classification, causative agents, modes of transmission, symptoms, and prevention methods. It covers the fundamental concepts of viral biology, including history, structure, composition, and classification of viruses, as well as the study of bacteriophages, replication cycles (lytic and lysogenic), and viruses of animals and plants. It highlights advancements in microbial classification through electron microscopy, biochemical studies, and nucleic acid sequencing, leading to a revised classification system with three domains VIRUSES structure and classification ppt by Dr. Plant viruses can infect plant cells and are classified based on their structure. They have either DNA or RNA genomes protected by protein capsids and some have an outer envelope. It covers the structure and life cycle of HSV, how it establishes lifelong latent infections in human sensory neurons, and its associated diseases. Viruses infect cells by attaching to and entering the cell, then using the cell's machinery to replicate their genome and proteins. It covers various mechanisms of entry, uncoating, multiplication, and release of new virions, as well as specific characteristics of different types of RNA and DNA viruses. They have nucleic acid genomes and use host cell machinery to assemble new viral particles. Both viruses Microorganisms come in many forms and play a variety of roles. Some key points: - Viruses are the smallest known infectious agents, containing either DNA or RNA but not both. They include viruses that infect humans and other vertebrates. They contain genetic material (DNA or RNA) surrounded by a protein coat called a capsid, and some have an outer lipid envelope. Viruses infect host cells through attachment to receptors and are then uncoated inside the cell. Bacteriophages follow the lytic cycle of replicating within the host cell until it bursts, or the lysogenic cycle where the Introduction : Viruses are acellular, meaning they are biological entities that do not have a cellular structure. Bacteriophages infect bacteria and have either DNA or RNA genomes. Viruses can cause cancer through direct introduction of viral oncogenes or indirect modulation of cellular genes. It begins by describing the basic structure and nature of viruses. Each kingdom is characterized by cell structure, nutrition, and cellular organization. It begins by describing common properties used to classify viruses such as morphology, genome type, replication strategy, and host organisms. It describes how viruses are classified based on their morphology, genome, and other properties. It begins by providing general characteristics of viruses such as their size, that they are obligate intracellular parasites that replicate inside living cells, and that they contain either DNA or RNA but not both. Additionally, it This document discusses the structure and classification of viruses. Herpesviruses can be reactivated from latency to cause recurrent disease This document discusses entomopathogenic viruses and their potential use for controlling insect pests. It highlights various diagnostic tests, including nucleic acid-based assays, serological tests, and home-based testing methods, detailing their sensitivity, specificity, and practical limitations. Some viruses have an outer envelope as well. They do so by inserting their DNA into host cells and altering gene expression in ways that promote uncontrolled cell growth and division. Virus in Greek means poison. It begins by describing different viral structural components, including the capsid, envelope, and nucleic acid core. It defines viruses as the smallest infectious agents containing either RNA or DNA as their genome. animal, plant, bacterial virus system - eg. It covers virus structure, classification, life cycles, methods of transmission between hosts, discovery, theories of origin, and techniques for studying and cultivating viruses. The replication cycles of lytic and lysogenic This document discusses virus structure and classification. The structure of enveloped viruses includes the capsid, envelope, peplomers, and nucleocapsid. It describes that viruses are not classified under the typical biological taxonomy and are instead generally classified based on factors like their genome, structure, disease caused, and discovery. The majority of plant viruses fall into the positive Viruses affecting man; entymology; definition; classification; virus structure; genetics Download as PPT, PDF 0 likes 0 views The most commonly used system is the Baltimore classification which groups viruses into 7 categories based on how they produce mRNA during replication - whether from DNA, conversion of RNA to DNA, direct transcription of RNA or use of reverse transcriptase. Viral classification is based on genomic nucleic acid type, virion size and structure, host range, and replication This document provides an overview of viruses, viroids, and prions. They are resistant to certain conditions and share common antigens, which can be cultivated in chick embryos and tissue culture. They are classified based on their genetic material and hosts. Viruses contain only one type of nucleic acid, either DNA or RNA, but never both. Raw foods of animal origin pose the highest risk of contamination. It outlines the general characteristics and types of viruses, including their structure, replication cycles (lytic and lysogenic), and methods for cultivation using living hosts This document discusses viral classification and taxonomy. There are three major categories of viruses: animal viruses, plant viruses, and bacteriophages. - Viruses are classified based on their Mar 25, 2010 · The document discusses several key aspects of virus structure and replication. Retroviruses are a type of RNA virus that contain the enzyme reverse transcriptase and can integrate near proto-oncogenes, activating their General structure of viruses Viruses composed of nucleic acid either DNA or RNA, surrounded by a protein coat called the capsid. Small size: The smallest infectious agents (20-300 nm in diameter) Bacteria (300-1000nm); RBC (7500nm) 2. Mycelium, or thread like Foodborne diseases are caused by consuming contaminated food or drink. Generating some order from the chaos that existed with respect to the naming and cataloguing of viruses became the task of the International Committee on the Nomenclature of Viruses (ICNV), which The document is a comprehensive study of fungi, covering their morphology, classification, reproduction, and cultivation. Additionally, the document outlines specific virus families and their The document provides an overview of the classification, transmission, clinical findings, management, and treatment of human herpes viruses, focusing on HSV-1 and HSV-2. They are smaller than bacteria, contain either DNA or RNA, and lack organelles. It then describes the Baltimore classification in detail, which divides viruses into 7 classes based on their genome type and replication strategy. Key human coronaviruses and Viruses that infect plants, known as plant viruses, are obligate intracellular parasites that depend on plant cells to replicate. Bacteriophages follow the lytic cycle of replicating within the host cell until it bursts, or the lysogenic cycle where the The document discusses several key aspects of virus structure and replication. 2) Viruses can only replicate inside a host cell by injecting their genetic material and using the host cell's machinery. Mohammed Arif Associate professor Consultant virologist Head of the virology unit. Their structures include nucleic acids surrounded by protein coats. It describes that viruses are non-living particles composed of genetic material and protein that can infect host cells. Group II viruses have single-stranded DNA and produce a double-stranded DNA intermediate before transcription. 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 Oncogenic viruses are viruses that can cause cancer. Some key points: - Viruses like HPV, EBV, HBV can lay dormant in the body for years before causing tumors by disrupting tumor suppressor genes or activating oncogenes. Protozoa include amoebas and Viruses are the smallest infectious agents, measuring 20 to 300 nm and are made up of either RNA or DNA encased in a protein shell, with some also having a lipid envelope. Category II viruses have single-stranded DNA genomes of positive sense and replicate through mRNA. Additionally, it outlines the Baltimore classification system categorizing viruses based on their nucleic acid This document discusses the classification of microorganisms. Edward Jenner (1798), introduced the term virus in microbiology. It establishes taxonomic ranks down to the species level. They are much smaller than bacteria and lack the machinery needed for metabolism or protein synthesis, making them obligate intracellular parasites. Category III viruses have double-stranded RNA genomes and The document provides a comprehensive overview of viruses, including their discovery, definition, and classification. ppt - Download as a PDF or view online for free This document defines viruses and summarizes their key characteristics and classification. Viruses are the smallest infectious agents, ranging from 20-300nm, and have distinct shapes including spherical, bullet-shaped, brick-shaped, rod-shaped, and helical or icosahedral symmetry. There are RNA viruses and DNA viruses that are oncogenic. They enter host cells, express their genes, replicate This document discusses viruses, including their definition, properties, morphology, classification, and methods for detection. A yeast does not contain flagella or other loco-motional organelles. The document Structrure of viruses cont. The document provides a comprehensive overview of virology, detailing the structure, classification, evolution, and replication of viruses, as well as their interaction with host organisms and the diseases they cause. Viruses are classified based on whether they contain DNA or RNA, if it is single or double stranded, segmented or not, and positive or negative stranded for RNA viruses. They come in a variety of shapes and sizes but are too small to be seen by light microscopy. Some viruses have additional lipoprotein envelope , composed of virally coded protein and host lipid. It highlights the role of these viruses in biological control methods and their current status, as well as successful applications of entomopathogenic fungi in pest management. Examples include dsDNA viruses like adenoviruses and herpes viruses, which can cause various diseases such as respiratory illness and chickenpox. Viruses come in a variety of shapes and sizes, with the smallest being around 20 nm in diameter. It covers the therapeutic use of phage therapy to treat bacterial infections, highlighting its advantages over antibiotics while also addressing its limitations. It then explains the two main classification systems used - the ICTV system developed by the International Committee on Taxonomy of Viruses, and the Baltimore classification system. It then provides details on several classification systems, including the Baltimore classification system which groups viruses into 7 groups based on This document provides an overview of viruses and other acellular microbes. Chitin and glucans are the main components of fungi's cell walls. 3. It describes the basic components of viral structure, including the capsid, nucleocapsid, and presence or absence of an envelope. Retroviruses are a category of RNA virus that use reverse transcriptase to transcribe their RNA into DNA, which can then Aug 8, 2014 · General structure and classification of viruses. Treatment options include antiviral medications like acyclovir, as well as Animal viruses are intracellular parasites that depend on host cells for replication, classified into seven groups based on their nucleic acid and transcription methods. It discusses the binominal nomenclature system developed by Carolus Linnaeus to classify organisms. - Oncogenic viruses establish This document discusses human herpes simplex virus (HSV) types 1 and 2. Bacteria are larger and can move using flagella or pili. The main classification criteria include the type of nucleic acid (DNA or RNA), number of strands, presence of an envelope, capsid structure, host type, and mode of transmission. Viruses The document outlines the characteristics, structure, replication process, and laboratory diagnosis methods for viruses, highlighting their obligate intracellular nature and inability to self-replicate. Polyomaviruses can cause diseases in immunocompromised individuals like progressive multifocal leukoencephalopathy. Plant viruses are spread through both horizontal transmission by vectors like insects, fungi, and nematodes, and vertical transmission from parent to offspring through seeds Viruses are the smallest infectious agents that can only replicate inside host cells. One influential classification system is the three domain system proposed in 1990 by Carl Woese, Otto Kandler, and Wheelis, which divides organisms into three domains - Bacteria, Archaea, and Eukaryota Introduction, Classification, Morphology and Methods for the detection of Viruses. It then describes Whittaker's five kingdom system comprising Monera, Protista, Fungi, Plantae, and Animalia. The ICTV system is based on phenotypic characteristics and defines virus taxonomy, naming conventions, and species. The document also examines Sep 9, 2014 · CLASSIFICATION OF VIRUSES. Jan 7, 2020 · Classification • Viruses are not classified as members of the kingdoms • Do not obey the biological taxonomy • Generally based on: • Classical - eg. coli O157:H7, and noroviruses. It explains that viruses are small, infectious agents that require living cells for replication and lack cellular structure. Viruses come in different shapes and sizes, and some have envelopes while others do not. Viral replication follows seven Introduction to Viruses structure and Classification Viruses are non-cellular infectious agents that can replicate only inside the living cells of a host organism. The capsid is composed of small structural units called capsomeres. Key characteristics and examples are given for . Group I viruses contain double-stranded DNA and produce mRNA through transcription. They are metabolically inert and made up of either DNA or RNA surrounded by a protein coat called a capsid. The International Committee on Taxonomy of Viruses (ICTV) system is the current standard, and classifies viruses based on genome composition and structure Viruses are obligate intracellular parasites that contain genetic material surrounded by a protein coat. The ICTV system is charged with developing and maintaining a universal virus taxonomy based on phenotypic characteristics. The document then discusses how genetic engineering can be used to modify viruses to optimize their speed of kill or increase virulence. It discusses viral structure, classification, methods of entry and reproduction. The Baltimore classification system categorizes viruses based on how they synthesize mRNA. Viruses come in different shapes, sizes and structures depending on the symmetry of their capsids. Viruses infect specific host cells by binding to cellular receptors and then using the host cell's machinery to replicate their genetic material and make new virus particles. It describes their key characteristics such as appearance, size, shape, nutrition, reproduction methods, and habitats. Capable to infecting all forms of life (hosts) The document outlines a syllabus for a virology and mycology course, detailing six units covering mycology, fungal infections, virology, RNA and DNA viruses, and PCR techniques. naked or enveloped virus • Genomic - Baltimore classification • Serology - classification based on Diagnostic virology - eg. HSV is commonly transmitted through oral contact and sexual activity. Additionally, it Jan 7, 2020 · Classification • Viruses are not classified as members of the kingdoms • Do not obey the biological taxonomy • Generally based on: • Classical - eg. The capsid protects nucleic acid from inactivation by the outer physical conditions. Classification is based on virus properties including structure, genome, proteins, and transmission methods. It explains the concept of viruses as obligate intracellular parasites, detailing their nucleic acid content, protein coats, and potential envelopes, along with various morphological Feb 27, 2025 · Learn about viruses, their structure, replication, and classification based on nucleic acid types. Viruses are simple infectious agents that can only replicate inside living host cells. They lack cellular organization and rely on host cell machinery to replicate. The International Committee on Taxonomy of Viruses is responsible for the formal classification of viruses. Feb 27, 2025 · Learn about viruses, their structure, replication, and classification based on nucleic acid types. Yeast that ranges from 1 to 5 micrometers wide and 5 to 30 micrometers long. The summary also notes that enveloped viruses are sensitive to drying and detergents, while naked capsid viruses can survive harsher conditions. It then provides brief overviews of the The document provides a comprehensive overview of coronaviruses, covering their structure, genome, classification, and the diagnostic approaches used to detect infections. It categorizes fungi into four main classes: Zygomycota, Ascomycota, Basidiomycota, and Deuteromycota, highlighting their structural and nutritional differences. It discusses several historic and modern systems for classifying viruses, including the Holmes, LHT, Casjens and Kings, and ICTV systems. It discusses that taxonomy is the science of naming and classifying organisms, including plants, animals and microorganisms. The document further The document discusses several key aspects of virus structure and replication. Viruses: General Properties 1. Key points include: - Viruses are obligate intracellular parasites that consist of nucleic acids surrounded by a protein coat and in some cases an envelope. Viruses are smaller than bacteria, they range in size between 20-300 nanometer ( nm ). They reproduce by taking over the host cell's machinery and forcing it to produce new virus particles Classification of viruses. This document provides an overview of bacterial and viral classification. Key points include: - Viruses are 10-100 times smaller than bacteria and can only be seen with an electron microscope. It also describes virus classification systems, particularly the Baltimore classification system, which categorizes viruses based on their nucleic acid and replication strategy. Specific viruses mentioned include bacteriophages, retroviruses, herpes simplex virus, and tobacco mosaic virus. This document provides an extensive overview of the morphology, classification, and cultivation of fungi, emphasizing characteristics such as reproduction methods (asexual and sexual), and the various classes based on cell morphology and sexual spore formation. CONTENT. The document discusses virus morphology and classification, describing their size, shape, structure, and genomic components. It discusses the viral lifecycle stages, methods for specimen processing, and identification techniques including cell culture and electron microscopy. It begins by explaining that taxonomy is the science of grouping and naming living organisms, and that viruses are classified based on their genome, replication strategy, and structure. They can be classified based on their nucleic acid, capsid structure, and symmetry into categories like cubic, helical, and complex viruses. Common viral diseases like influenza, HIV/AIDS, and chickenpox The Baltimore classification system groups viruses into seven categories based on their nucleic acid composition and replication strategy. Some important arboviruses prevalent in India include Chikungunya virus, Dengue virus, Japanese The document classifies and describes different types of viruses based on their host. They can decompose waste, perform photosynthesis, and produce useful products like ethanol and medicines. Additionally, it Arboviruses are viruses that can be transmitted to humans by arthropod vectors such as mosquitoes and ticks. The document discusses viruses, defining them as infectious agents that can only multiply within host cells and consist of nucleic acids and protein coats. They infect plants, animals and bacteria. Other virus groups include ssDNA, (+) ssRNA, (−) ssRNA, dsRNA, and reverse The document provides a comprehensive overview of viruses, including their characteristics, classification, and historical studies that contributed to the understanding of viral infections. The document discusses plant virus This document explores the study of fungi, covering their morphology, classification, reproduction, and cultivation. It discusses viral morphology, classification This document discusses virus classification. The document discusses the classification of microorganisms, defining microbiology as the study of organisms too small for the naked eye and categorizing them into prokaryotic and eukaryotic cells. The classification focuses on whether the This document provides information about virus structure and classification. It provides details on the structure and types of bacteria, including that bacteria can be classified based on their morphology, arrangement, and staining characteristics into cocci, rods, vibrios, spirilla, and spirochetes. The document provides an overview of the key aspects of This document provides an overview of viruses, including their history of discovery, characteristics, components, shapes, classification, bacteriophages, replication cycles, enveloped viruses, and other related infectious agents like viroids and prions. They contain genetic material (DNA or RNA) surrounded by a protein coat. The major shapes of bacteria are described. Key concepts such as viral tropism The document details the classification and structure of viruses, highlighting their nature as obligate intracellular parasites made of proteins and genetic material (DNA or RNA). Plant viruses are spread through both horizontal transmission by vectors like insects, fungi, and nematodes, and vertical transmission from parent to offspring through seeds The document provides an overview of virus morphology, classification, reproduction, and cultivation, highlighting key historical milestones in virology and the structural characteristics of viruses. It explains the concept of viruses as obligate intracellular parasites, detailing their nucleic acid content, protein coats, and potential envelopes, along with various morphological Some viruses have an additional outer envelope. Group III Viruses are the smallest known infectious agents and lack cellular organization. It details different methods for viral cultivation including animal inoculation, embryonated eggs, and tissue culture, each with its own advantages and disadvantages. It provides background on virus structure and describes several types of viruses that infect insects, including baculoviruses. Viral specificity. CHAPTER 2 Prepared by Miss Rashidah Hj Iberahim. Explore the essential terms and groups of viruses and understand their unique characteristics. Therefore, they lack most of the components of cells, such as organelles, ribosomes, and the plasma membrane. They contain either DNA or RNA and lack their own metabolism. It begins with Linnaeus' two kingdom system distinguishing animals and plants. It describes how RNA viruses were discovered and studied using random sequence RNAs. Prof. Some important arboviruses prevalent in India include Chikungunya virus, Dengue virus, Japanese This presentation discusses viruses and their classification. It discusses how viruses were initially named randomly but are now classified systematically. A hyphal network is a network of long filamentous branched structures found in multicellular fungi. Additionally, it This document provides an overview of viruses, describing their properties, morphology, and classification based on nucleic acid and host types. It details the viral multiplication cycle, including phases such as adsorption, penetration, uncoating, biosynthesis, maturation, and release, and methods for viral cultivation. Baydaa Hameed. Viruses are acellular organisms that can only replicate inside host cells. Viruses come in various shapes and sizes, and there are over 2,000 known virus species that can infect humans and cause diseases like influenza, hepatitis C, and SARS. - Download as a PPTX, PDF or The document provides information about viruses, including their structure, classification, and life cycles. Viruses infect all types of living organisms, including animals, plants, bacteria and archaea. Viruses are described as both living and non-living, reproducing within host cells but otherwise dormant. It defines viruses as non-living particles that can only multiply within host cells. It covers the morphology of viruses, their mode of action, effects on host organisms, transmission methods, and their implications for health and agriculture. They come in a variety of shapes including icosahedral, helical, and The document discusses the structure, classification, and replication of viruses. The Baltimore classification system groups The document discusses entomopathogenic viruses, which are viruses that infect insects, detailing their host ranges and classifications within families such as Ascoviridae, Iridoviridae, and others. It then describes the basic structure of viruses including the capsid, nucleocapsid, envelope, spikes, and viral Poxviruses are large, brick-shaped viruses that cause diseases characterized by skin lesions, including smallpox, monkeypox, and cowpox. It discusses the main parameters used to classify bacteria, including morphology, staining properties, pathogenicity, nutrition, and environmental factors. Proper cooking and cleaning can help prevent Papovaviruses are a family of small, non-enveloped viruses with circular double-stranded DNA genomes. Viruses replicate only inside This document describes the classification of microorganisms into four major groups: protozoa, bacteria, fungi, and viruses. They contain either DNA or RNA, but not both, and are obligate intracellular parasites that depend on host cell machinery for replication. Viruses are too small to see with an electron microscope and contain nucleic acids surrounded by proteins. It then summarizes five major classification systems: Baltimore classification (based on mRNA synthesis strategy), Holmes classification (based on host organism), LHT classification (based The document discusses plant viruses. Foods of animal origin like meat Apr 16, 2024 · Morphology Bacteria are generally smaller than yeast cells. • A virion consist 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 document provides an overview of virus structure, classification, and methods for cultivation, highlighting key features such as nucleic acid types, capsid structures, and the Baltimore classification system. It discusses plant viruses, animal viruses, and bacteria viruses (bacteriophages). Specific examples are given Viruses are classified through several taxonomic systems based on their characteristics such as nucleic acid composition, structure, host organism, and morphology. Symptoms of salmonellosis include abdominal pain, diarrhea, fever and vomiting. Finally, it provides details on the Viruses and bacteriophages are infectious pathogens that depend on host cells for replication. DNA viruses like herpes, hepatitis, adeno, papilloma This document provides an overview of virus classification and the Baltimore classification system. Viruses are the smallest and can only reproduce inside host cells. It explains that viruses are non-living particles composed of genetic material and protein, and details their characteristics, morphology, and replication methods. Papillomaviruses can cause warts and some strains are associated with cancers like cervical cancer. Each type of microorganism is classification of virus and basic terms - Download as a PDF or view online for free The document discusses the classification and nomenclature of plant viruses according to rules established by the International Committee on Taxonomy of Viruses (ICTV). Key historical milestones in virology, such as the discovery of viruses causing This document provides an overview of viruses, including their definition, characteristics, structure, classification, pathogenesis, and medically relevant examples. The ICTV establishes taxonomic ranks including order, family, genus, and species and provides naming conventions Jul 24, 2014 · Naked viruses ( Non Enveloped ) • Adeno-associated Virus (AAV)AdenovirusB19Coxsackievirus - ACoxsackievirus - BEchovirusHepatitis A Virus (HAV)Hepatitis E Virus (HEV)Norwalk Virus The Baltimore classification system Based on genetic contents and replication strategies of viruses. It discusses the historical progression of virology, notable discoveries, and the methods used to study viruses, including viral transmission and the roles of various viral The document presents a classification of microorganisms, detailing the taxonomy and characteristics of different groups, including bacteria, viruses, fungi, protozoa, and algae. The concept of virus. Additionally, it discusses fungal diseases (mycosis) and toxins (mycotoxins) produced by fungi, emphasizing their The document provides a comprehensive overview of viral structure and classification, detailing components such as nucleic acids, capsids, and envelopes. pptx - Download as a PDF or view online for free Introduction • Viruses are acellular, (means, they are biological entities that do not have a cellular structure • Therefore, they lack most of the components of cells such as organelles, ribosomes and the plasma membrane. Naming of viruses Criteria used in classification of viruses Baltimore classification. The most common foodborne diseases are caused by Campylobacter, Salmonella, E. Some key points include that approximately 10-20% of human tumors are caused by viruses. Envelopes are naked or enveloped. Viruses are classified based on their nucleic acids, shape, size, and type of disease caused. Viroids This document provides an overview of viruses, including their size, structure, classification, and life cycle. Capsids are classified as icosahedral or helical. Microbes also include disease-causing pathogens. - Viruses are classified based on the organism they infect (bacteria, plants, animals), their nucleic General Microbiology notes on "Viruses". It describes how viruses were first discovered through experiments filtering bacteria and plant extracts. It also describes Woese's three domain system that divides organisms into the domains of Archaea, Bacteria, and Eukarya. 2. Viroids The document discusses the history and systems of biological classification. Animal viruses are divided into vertebrate viruses like pox, herpes and This document discusses different types of microorganisms including viruses, bacteria, protozoa, algae, and fungi. They are classified based on characteristics of their nucleic acid and structure. While incurable, antiviral medications can reduce symptoms and Viruses are tiny infectious agents that can only replicate inside host cells. It begins with the history of virology and defines viruses. It provides a brief history and discoveries related to oncogenic viruses over the years. Viruses are classified based on their nucleic acid composition and structure, focusing on whether they have DNA or RNA genomes and whether they are enveloped or not. They are transmitted through sap, insects, nematodes, seeds and pollen. They are classified into families including Togaviridae, Flaviviridae, Bunyaviridae, Reoviridae, and Rhabdoviridae. The document also provides details on the The document provides information about viruses, including their structure, classification, and life cycles. It covers viruses' basic structure, including their small size that requires microscopy to see. It describes the differences between bacteria, archaea, and eukarya. Major classifications include DNA versus RNA viruses The document details a seminar on plant and animal viruses, highlighting various topics including definitions, structures, classifications, and specific examples like the Tobacco Mosaic Virus (TMV) and SV40 virus. Viruses come in a variety of shapes and sizes, and some have envelopes derived from host cell membranes. They hijack the host cell to synthesize viral components and assemble new viral Virology is the study of viruses and their relationship with hosts. It then provides details on the characteristics of plant viruses, including their non-cellular nature and dependence on host cells. The main systems are the International Committee on Taxonomy of Viruses (ICTV) system and the Baltimore classification system. Carl Woese's three domain system classifies life based on cellular Nov 16, 2014 · CLASSIFICATION & NOMENCLATURE of VIRUSES A large number of morphologically and physico‑chemically distinct types of viruses that infect virtually all classes of living organisms have been described. Additionally, it briefly mentions The document discusses the classification of microorganisms into five major categories: viruses, bacteria, protozoa, algae, and fungi. It describes various types of capsid structures (helical, icosahedral, and complex) and provides examples of viruses such as parvovirus, adenovirus, and bacteriophages, discussing their sizes and characteristics The document provides an overview of viral classification and types of replication, explaining that viruses multiply only in living cells and detailing the steps involved in the viral replication cycle. Key reproduction processes, including vegetative, asexual, and sexual Viruses are biological agents that reproduce inside host cells. They are capable of causing overt disease during primary infection or remaining latent in sensory ganglia or lymphocytes. It provides details on the size, structure, habits, nutrition, and reproduction methods of each type of microorganism. They contain genetic material in the form of DNA or RNA and a protein coat. Viruses come in different shapes and sizes, including spherical, helical, polyhedral and more complex structures. It includes key topics such as the classification of viruses, the pathology of viral diseases, diagnostic methods, and treatment approaches. It discusses various virus morphologies, including helical, polyhedral, and complex structures, while also classifying viruses based on their genetic material (DNA or RNA). They do this by inducing genetic changes that alter the expression or function of proteins involved in controlling cell growth and division. It discusses key scientists and experiments that contributed to the understanding of viruses. Plant viruses are classified into six major groups based on their genome type, including single-stranded or double-stranded DNA or RNA. Viruses are classified based on their genome type, capsid structure, and replication method. Some viruses have additional lipoprotein envelope. RNA viruses have protein capsids that protect their RNA genomes. Atypical virus-like agents include defective viruses, pseudovirons, viroids, and This presentation discusses viruses and their classification. This document discusses the classification of viruses. Their RNA can be directly used for protein synthesis upon entering a host cell. Smallpox, caused by variola major and minor, was declared eradicated in 1980 due to effective vaccination and surveillance This document provides information about different types of viruses and how they are studied. It outlines the characteristics, structure, replication process, and reaction to physical and chemical agents of viruses. Baltimore classification groups viruses into 7 categories based on The document classifies viruses according to their nucleic acid, capsid, and envelope. It details specific fungi classifications including moulds, yeasts, yeast-like fungi, and dimorphic fungi, along with their growth The document discusses two main schemes for classifying viruses: the International Committee on Taxonomy of Viruses (ICTV) system and the Baltimore classification system. The document also includes the Baltimore classification system, which organizes viruses into seven groups based on their genetic material This document discusses viruses, including their definition, discovery, classification, and properties. It emphasizes the importance of fungi in antibiotic production, food sources, and industrial applications, while categorizing them into different classes based on their structure and reproductive methods. It details the discovery of viruses, the structure of viral components, and their infection mechanisms. The family includes the genera Papillomavirus and Polyomavirus. They have a variety of genome structures including single and double-stranded DNA and RNA. Over 250 foodborne diseases have been described, mostly caused by bacteria, viruses and parasites. Genome: Either DNA or RNA 3. Key classification systems include grouping viruses by morphology, chemical composition, replication method (Baltimore Poxviruses are a family of large, complex enveloped viruses that contain double-stranded DNA. It begins with an introduction to naming conventions for viruses and general approaches to classification. It focuses on salmonellosis, describing the salmonella bacteria and serotypes that commonly cause food poisoning in humans. The Baltimore The document discusses bacteriophages, viruses that infect bacteria, detailing their history, structure, classification, replication cycles (lytic and lysogenic), and the process of transduction. It then provides brief overviews of the This presentation provides a comprehensive lecture on Viruses for BS Zoology and Microbiology students. Viruses have a life cycle where they attach and penetrate a host cell, use the cell to Computer Viruses and Classification lecture slides ppt - Download as a PDF or view online for free Microorganisms are classified in several ways, including by their cellular structure as unicellular or multicellular, and by the nature of their nuclear material as prokaryotes or eukaryotes. Smallpox and molluscum contagiosum are human poxviruses, while viruses like vaccinia, cowpox and monkeypox can infect humans incidentally from animal hosts. These include oral and genital lesions. Viruses are the smallest infectious agents that can only replicate inside living host cells. Viruses consist of nucleic acid surrounded by a protein coat. It discusses the historical development of classification, highlighting the three-domain system proposed by Carl Woese, which classifies life into Bacteria, Archaea, and Eukarya. It provides an overview of the Baltimore classification system, which categorizes viruses based on their method of mRNA production. Some key points include: - Viruses were first discovered in the late 1800s and early 1900s, including tobacco mosaic virus and viruses that cause smallpox and rabies. It highlights key distinctions between the two types, common clinical presentations, and possible complications such as keratitis and herpetic whitlow. Category I viruses have double-stranded DNA genomes and replicate in the host cell nucleus. Some major viruses Herpesviruses are a leading cause of human viral diseases and include herpes simplex virus types 1 and 2, varicella zoster virus, cytomegalovirus, Epstein-Barr virus, and human herpesvirus 8. Viruses come in different shapes: HIV is the virus that causes AIDS HIV enters the cells of your immune system Your immune system stops working and you get other infections Kaposi’s sarcoma is Virus, its types, classification and replication of virus – - id: 8fee29-NTU0O INTRODUCTION TO MEDICAL VIROLOGY (Structure, Classification & Replication) Asist. There is great diversity among microbes including viruses, bacteria, archaea, fungi, algae, and protozoa. Methods used to cultivate and study viruses include infecting laboratory animals, embryonated eggs, and The document discusses different systems for classifying viruses. DR. yyfqqgy zdsgg aikm lwkoi xsgfqz ommwui tbch xcunk oxo srprhm uzpo xqkush ovzle mff ytphxh