Introduction to Viruses
•Download as PPTX, PDF•
1 like•421 views
This document provides an introduction to viruses, defining them as infective agents consisting of nucleic acid and protein coat that are too small to see with a light microscope and can only multiply within a host cell. It recaps that viruses are not cells but contain DNA/RNA protected by protein and need a host to reproduce. While viruses lack traditional traits of life like cells, they have significant impacts on living organisms and public health.
Report
Share
Report
Share
Recommended
Viruses ...in detail
Concept of virology
Viruses
Types of viruses
Viral characteristics
Virion
Size and Shape
Structure
Replication
Viral Variation
Classification
Presentation
BEST OF LUCK
Chapter 1 introduction to virus
Viruses are small infectious agents that cannot replicate outside of host cells. They contain either DNA or RNA surrounded by a protein coat called a capsid. Some viruses have an additional outer envelope. Viruses come in different shapes and sizes, including spherical, helical, polyhedral and more complex structures. 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.
Viruses
Viruses are non-cellular, obligate intracellular parasites that consist of nucleic acid (DNA or RNA) surrounded by a protein coat. They can only replicate inside living host cells by using the host's cellular machinery. Viruses come in a variety of shapes and sizes but are generally quite small, ranging from 18-400 nm. They are classified based on their nucleic acid composition and structure. Viruses infect both plants and animals and include important human pathogens.
general properties of virus
this presentation gives idea about general properties of viruses like how they differ from prokaryotes,different forms etc, general structure.
AGR154 CHAPTER 4 - VIRUS
Viruses are nucleoproteins that can only reproduce inside living cells. They have either DNA or RNA, come in various shapes, and form protective capsids around their nucleic acids. Viruses utilize host cell substances to multiply, taking up space and disrupting cellular processes. They enter plants through wounds, vectors, or infected plant parts. Viruses move between cells through plasmodesmata and are transported via phloem to growing regions. Detection methods include observing inclusion bodies under microscopes, viewing virus particles with electron microscopes, transmission to healthy plants, serology tests like ELISA, and using DNA/RNA probes.
Viruses
Viruses are composed of nucleic acids enclosed in a protein coat and are smaller than bacteria. They cannot replicate without a host cell and are considered non-living. A virus infects a host cell by attaching to receptors on its surface, and then either injects its nucleic acid inside or fuses with the host cell's membrane. Once inside, the virus takes over the cell's machinery to replicate itself through one of two cycles - lytic kills the host cell, while lysogenic integrates viral DNA into the host genome without immediately killing the cell. Retroviruses like HIV are unique as they use reverse transcriptase to transcribe their RNA into DNA before integrating into the host cell's chromosome.
general organization and characterstics of virus
Viruses are nonliving infectious agents that contain either DNA or RNA surrounded by a protein coat called a capsid. They can only reproduce inside of living host cells by hijacking the cell's machinery to produce more viruses. Viruses vary greatly in size and morphology, ranging from 10-400 nanometers, and some have an additional outer envelope acquired from the host cell membrane. They exhibit both living characteristics like reproduction and mutation, as well as nonliving characteristics as they do not metabolize or divide outside of host cells.
Viruses, viroids, and prions
this is the full description of viruses. structure, figure, and the diseases caused by the virus, viroids, prions are briefly describe here.
Recommended
Viruses ...in detail
Concept of virology
Viruses
Types of viruses
Viral characteristics
Virion
Size and Shape
Structure
Replication
Viral Variation
Classification
Presentation
BEST OF LUCK
Chapter 1 introduction to virus
Viruses are small infectious agents that cannot replicate outside of host cells. They contain either DNA or RNA surrounded by a protein coat called a capsid. Some viruses have an additional outer envelope. Viruses come in different shapes and sizes, including spherical, helical, polyhedral and more complex structures. 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.
Viruses
Viruses are non-cellular, obligate intracellular parasites that consist of nucleic acid (DNA or RNA) surrounded by a protein coat. They can only replicate inside living host cells by using the host's cellular machinery. Viruses come in a variety of shapes and sizes but are generally quite small, ranging from 18-400 nm. They are classified based on their nucleic acid composition and structure. Viruses infect both plants and animals and include important human pathogens.
general properties of virus
this presentation gives idea about general properties of viruses like how they differ from prokaryotes,different forms etc, general structure.
AGR154 CHAPTER 4 - VIRUS
Viruses are nucleoproteins that can only reproduce inside living cells. They have either DNA or RNA, come in various shapes, and form protective capsids around their nucleic acids. Viruses utilize host cell substances to multiply, taking up space and disrupting cellular processes. They enter plants through wounds, vectors, or infected plant parts. Viruses move between cells through plasmodesmata and are transported via phloem to growing regions. Detection methods include observing inclusion bodies under microscopes, viewing virus particles with electron microscopes, transmission to healthy plants, serology tests like ELISA, and using DNA/RNA probes.
Viruses
Viruses are composed of nucleic acids enclosed in a protein coat and are smaller than bacteria. They cannot replicate without a host cell and are considered non-living. A virus infects a host cell by attaching to receptors on its surface, and then either injects its nucleic acid inside or fuses with the host cell's membrane. Once inside, the virus takes over the cell's machinery to replicate itself through one of two cycles - lytic kills the host cell, while lysogenic integrates viral DNA into the host genome without immediately killing the cell. Retroviruses like HIV are unique as they use reverse transcriptase to transcribe their RNA into DNA before integrating into the host cell's chromosome.
general organization and characterstics of virus
Viruses are nonliving infectious agents that contain either DNA or RNA surrounded by a protein coat called a capsid. They can only reproduce inside of living host cells by hijacking the cell's machinery to produce more viruses. Viruses vary greatly in size and morphology, ranging from 10-400 nanometers, and some have an additional outer envelope acquired from the host cell membrane. They exhibit both living characteristics like reproduction and mutation, as well as nonliving characteristics as they do not metabolize or divide outside of host cells.
Viruses, viroids, and prions
this is the full description of viruses. structure, figure, and the diseases caused by the virus, viroids, prions are briefly describe here.
VIRUSES
This seminar presentation summarizes the general characteristics and classification of viruses. It defines viruses as obligate intracellular parasites that are too small to be seen by optical microscopes and must replicate inside host cells. Viruses do not have cellular organization and contain either DNA or RNA, but not both. They lack the enzymes for protein and nucleic acid synthesis and are dependent on host cell machinery for replication. Viruses come in various shapes and sizes and have capsids made of protein that surround their nucleic acid cores. Their capsids exhibit different symmetries and some viruses have envelopes. Viruses are cultivated using techniques like animal inoculation, embryonated egg culture, and cell culture.
B.sc.(micro) i em unit 3.5 viruses
Viruses have both living and non-living properties. They contain nucleic acids surrounded by a protein coat called a capsid, and some have an additional lipid envelope. Viruses come in various shapes and sizes, and infect bacteria, plants, and animals. They are able to replicate by entering host cells and using the host's cellular machinery to produce new virus particles, which then exit and infect new host cells.
Bacteriophage, phage typing and application
This document discusses bacteriophages (phages), viruses that infect bacteria. It covers the composition and structure of phages, how they infect host cells through adsorption and nucleic acid injection, and their multiplication cycles of either the lytic or lysogenic pathways. The document also discusses phage typing, which uses specific phages to identify and differentiate bacterial pathogens, and applications of phages in areas like diagnostics, therapeutics, biocontrol, and more.
07 viruses
Viruses are small infectious particles that contain genetic material and reproduce by inserting their DNA or RNA into host cells. They are not considered living organisms as they do not have cells, lack metabolism, and are obligate intracellular parasites. Viruses can cause diseases in humans and other organisms. They reproduce through lytic and lysogenic cycles and can be transmitted through various methods like contact, air, body fluids, or insect bites depending on the virus. While viruses cause disease, they can also be used to deliver beneficial genes or drugs through viral vectors in applications like gene therapy or chemotherapy. Other infectious particles like viroids and prions also lack cells but can damage crops or brains.
8 - Virus Structure Multiplication
Viruses are small infectious agents that cannot replicate without a host cell. They contain either DNA or RNA as their genetic material and have a protein capsid that protects the genetic material. Some viruses have an additional envelope outside the capsid. Viruses hijack the machinery of host cells to replicate their genetic material and assemble new virus particles. The replication cycle involves attachment to and entry into the host cell, uncoating of the virus, replication of the genetic material, assembly of new virus particles, and release of progeny viruses. DNA viruses can either integrate into the host cell genome or replicate episomally. RNA viruses use RNA-dependent RNA polymerases or reverse transcriptase. Viruses may cause disease in hosts by
Characteristics of viruses
Viruses are the smallest of all pathogens, ranging from 20-500 nanometers in size, consist of either DNA or RNA surrounded by a protein coat or capsule, and have characteristics of both living and non-living entities. They contain genetic material and can reproduce but only within a host cell by taking over the cell's machinery. Viruses cause infectious disease, come in different shapes, and have the ability to mutate or become dormant.
M2 basic virus_hg
Viruses are small infectious particles that contain genetic material inside a protein coat. They are not living and can only reproduce inside host cells by hijacking the cell's machinery. There are two main types of viruses - those containing DNA and those containing RNA. All viruses have a basic structure that includes the genetic material surrounded by a protein capsid and sometimes an outer lipid envelope. Viruses infect cells by attaching to and entering the cell, then using the cell to replicate their genome and proteins and assemble new virus particles which are released to infect other cells. The immune system helps fight viral infections through cell-mediated immunity and antibody production.
Structure and diversity of virus
Viruses come in a wide diversity of shapes and structures. They contain either DNA or RNA genetic material within a protein capsid shell that protects the nucleic acid. Some viruses have an additional outer membrane envelope. Viruses replicate solely within the living cells of their host by using the host's cellular machinery and cannot reproduce on their own. They range in complexity from simple viruses with just a few genes to more complex viruses with thousands of genes. Viruses infect all domains of life including animals, plants, bacteria, and archaea.
Viruses
Viruses come in a variety of shapes and sizes and are composed of either RNA or DNA surrounded by a protein capsid. They can only replicate by infecting living host cells. Viruses enter cells through different methods like endocytosis, fusing with membranes, or piercing the cell. Viral infection can result in lysis of the host cell or lysogeny where the viral DNA remains dormant within the host DNA. Common viral diseases are spread through routes like respiratory droplets, contaminated objects or fluids, mosquitoes, and food. Prevention methods include vaccines, good hygiene, and disinfectants.
Viruses
This document discusses the classification of viruses based on their structure, genetic material, replication process, and other properties. It describes the main groups of viruses according to the Baltimore classification system, which categorizes viruses into 7 groups based on their genome type and replication strategy. The groups include double-stranded DNA viruses, single-stranded DNA viruses, double-stranded RNA viruses, and different types of single-stranded RNA viruses. The document also discusses taxonomy based on other virus characteristics.
Viral replication by Kainat Ramzan-SlideShare
Virus multiplication are in Following steps: attached, penetration, biosynthesis, maturation, assembly and release and also discribe the life of Bacteriophage by following two life cycle
Present By Kainat Ramzan
General characteristics of virus
Viruses are the smallest infectious agents that can only replicate inside living host cells. They are metabolically inert and made up of either DNA or RNA surrounded by a protein coat called a capsid. Some viruses have an outer envelope as well. Viruses come in different shapes, sizes and structures depending on the symmetry of their capsids. They infect plants, animals and bacteria. Viruses replicate through lytic and lysogenic cycles where they take over the host cell machinery to produce new virus particles. While they exhibit some living properties like mutation and existing in different strains, viruses still lack many cellular functions and rely entirely on host cells for reproduction.
Viruses ppt
Viruses exist at the boundary between living and non-living things. They consist of nucleic acids and proteins but cannot reproduce outside of a host cell. Viruses come in different shapes and sizes and have unique structures suited to their method of infection. They hijack the machinery of living cells to reproduce either through lytic or lysogenic cycles, ultimately resulting in the destruction of the host cell. While viruses rely on host cells, they are not considered alive as they do not have their own metabolism or respond to their environment.
Chapter+5,+25,+37 (microbiology) 8th edition
Viruses are genetic elements that cannot replicate independently and cause many diseases. They come in various shapes and sizes and have either DNA or RNA genomes. Viruses infect all types of living organisms including bacteria, archaea, animals, and plants. They replicate inside host cells and can cause cell lysis or establish persistent infections. Important viral models include bacteriophages and retroviruses. Viruses display both lytic and lysogenic life cycles and use a variety of mechanisms to infect hosts and replicate their genomes.
Viruses
1) Viruses are non-living infectious particles that contain genetic material and a protein coat called a capsid. 2) Viruses can only replicate inside a host cell by injecting their genetic material and using the host cell's machinery. 3) Viruses exist in two states - as active viruses when infecting a host cell, or dormant virions when not in contact with a host.
Viral replication
The document discusses the process of viral replication. It begins with an introduction that defines viral replication as the production of all virus components through an assembly process rather than cellular division. It then describes the 7 key steps in viral replication: 1) Attachment, 2) Penetration, 3) Uncoating, 4) Genome replication, 5) Assembly, 6) Maturation, and 7) Release of new virus particles. The document concludes that while the details vary, all viruses follow a similar overall replication process to initiate infection, replicate their genomes, and release new virions.
Prokaryotes Virus APBio
Prokaryotes include bacteria and archaea. Bacteria come in various shapes and have diverse metabolic pathways. They reproduce through binary fission and exchange genetic material through conjugation. Archaea inhabit extreme environments like hot springs and saltwater. Viruses are parasites that infect cells and hijack their machinery to replicate. They are host-specific and have a protein coat surrounding their genetic material. Prions are infectious protein particles that cause fatal neurological diseases.
1 virus structure
This document discusses key concepts about viruses including their structure, classification, replication, and mechanisms of infection. The main points covered are:
- Viruses are obligate intracellular parasites that can only replicate inside host cells and are composed of nucleic acids surrounded by a protein capsid.
- They come in various shapes including spherical, rod-shaped, and helical and have either DNA or RNA genomes.
- Viruses hijack host cell machinery to produce new viral components and assemble them into progeny virus particles to infect new cells.
- They are classified based on properties like genome type, morphology, and replication mechanisms. Important human viruses like herpesviruses, coronaviruses, and HIV are discussed.
B.sc.1 viruses general characteristics
The document discusses key characteristics and properties of viruses. It notes that viruses are microscopic particles that infect cells and often destroy them. Viruses are smaller than bacteria, change rapidly, and there are many unknown types. Their small size and rapid mutation make viruses difficult to treat. The document then describes viruses as obligate intracellular parasites that are non-cellular, replicate by taking over host cell machinery, and lack their own metabolism or protein synthesis abilities. Finally, it briefly discusses virus shapes, taxonomy, and references used.
Viruses and prion
Viruses and prions are two types of infectious agents. Viruses are small microorganisms that infect other living organisms and consist of nucleic acid surrounded by a protein shell. They can cause oral diseases. Prions are proteinaceous particles that can self-replicate and induce neurodegenerative diseases like Creutzfeldt-Jakob disease in humans after a long incubation period. They are highly resistant to inactivation.
Virus
This document discusses microbes, pathogens, viruses, and viral diseases. It begins by defining microbes and pathogens, noting that microbiology studies microorganisms responsible for common diseases. It then describes viruses, explaining that they are non-living particles that invade and reproduce inside living cells using the cell's genetic material and processes. The document outlines the basic parts of viruses and how they hijack cells, causing the cell to explode and release new virus copies to infect other cells. It notes that viruses cannot live without a host cell and do not have the characteristics of living things. In the end, it lists some common viral diseases caused by cell damage or death.
Viruses-definition, classification, replication, cultivation of viruses
Viruses-definition, classification, replication, cultivation of virusesDepartment of Pharmaceutics
Pravara Rural College of Pharmacy Loni
More Related Content
What's hot
VIRUSES
This seminar presentation summarizes the general characteristics and classification of viruses. It defines viruses as obligate intracellular parasites that are too small to be seen by optical microscopes and must replicate inside host cells. Viruses do not have cellular organization and contain either DNA or RNA, but not both. They lack the enzymes for protein and nucleic acid synthesis and are dependent on host cell machinery for replication. Viruses come in various shapes and sizes and have capsids made of protein that surround their nucleic acid cores. Their capsids exhibit different symmetries and some viruses have envelopes. Viruses are cultivated using techniques like animal inoculation, embryonated egg culture, and cell culture.
B.sc.(micro) i em unit 3.5 viruses
Viruses have both living and non-living properties. They contain nucleic acids surrounded by a protein coat called a capsid, and some have an additional lipid envelope. Viruses come in various shapes and sizes, and infect bacteria, plants, and animals. They are able to replicate by entering host cells and using the host's cellular machinery to produce new virus particles, which then exit and infect new host cells.
Bacteriophage, phage typing and application
This document discusses bacteriophages (phages), viruses that infect bacteria. It covers the composition and structure of phages, how they infect host cells through adsorption and nucleic acid injection, and their multiplication cycles of either the lytic or lysogenic pathways. The document also discusses phage typing, which uses specific phages to identify and differentiate bacterial pathogens, and applications of phages in areas like diagnostics, therapeutics, biocontrol, and more.
07 viruses
Viruses are small infectious particles that contain genetic material and reproduce by inserting their DNA or RNA into host cells. They are not considered living organisms as they do not have cells, lack metabolism, and are obligate intracellular parasites. Viruses can cause diseases in humans and other organisms. They reproduce through lytic and lysogenic cycles and can be transmitted through various methods like contact, air, body fluids, or insect bites depending on the virus. While viruses cause disease, they can also be used to deliver beneficial genes or drugs through viral vectors in applications like gene therapy or chemotherapy. Other infectious particles like viroids and prions also lack cells but can damage crops or brains.
8 - Virus Structure Multiplication
Viruses are small infectious agents that cannot replicate without a host cell. They contain either DNA or RNA as their genetic material and have a protein capsid that protects the genetic material. Some viruses have an additional envelope outside the capsid. Viruses hijack the machinery of host cells to replicate their genetic material and assemble new virus particles. The replication cycle involves attachment to and entry into the host cell, uncoating of the virus, replication of the genetic material, assembly of new virus particles, and release of progeny viruses. DNA viruses can either integrate into the host cell genome or replicate episomally. RNA viruses use RNA-dependent RNA polymerases or reverse transcriptase. Viruses may cause disease in hosts by
Characteristics of viruses
Viruses are the smallest of all pathogens, ranging from 20-500 nanometers in size, consist of either DNA or RNA surrounded by a protein coat or capsule, and have characteristics of both living and non-living entities. They contain genetic material and can reproduce but only within a host cell by taking over the cell's machinery. Viruses cause infectious disease, come in different shapes, and have the ability to mutate or become dormant.
M2 basic virus_hg
Viruses are small infectious particles that contain genetic material inside a protein coat. They are not living and can only reproduce inside host cells by hijacking the cell's machinery. There are two main types of viruses - those containing DNA and those containing RNA. All viruses have a basic structure that includes the genetic material surrounded by a protein capsid and sometimes an outer lipid envelope. Viruses infect cells by attaching to and entering the cell, then using the cell to replicate their genome and proteins and assemble new virus particles which are released to infect other cells. The immune system helps fight viral infections through cell-mediated immunity and antibody production.
Structure and diversity of virus
Viruses come in a wide diversity of shapes and structures. They contain either DNA or RNA genetic material within a protein capsid shell that protects the nucleic acid. Some viruses have an additional outer membrane envelope. Viruses replicate solely within the living cells of their host by using the host's cellular machinery and cannot reproduce on their own. They range in complexity from simple viruses with just a few genes to more complex viruses with thousands of genes. Viruses infect all domains of life including animals, plants, bacteria, and archaea.
Viruses
Viruses come in a variety of shapes and sizes and are composed of either RNA or DNA surrounded by a protein capsid. They can only replicate by infecting living host cells. Viruses enter cells through different methods like endocytosis, fusing with membranes, or piercing the cell. Viral infection can result in lysis of the host cell or lysogeny where the viral DNA remains dormant within the host DNA. Common viral diseases are spread through routes like respiratory droplets, contaminated objects or fluids, mosquitoes, and food. Prevention methods include vaccines, good hygiene, and disinfectants.
Viruses
This document discusses the classification of viruses based on their structure, genetic material, replication process, and other properties. It describes the main groups of viruses according to the Baltimore classification system, which categorizes viruses into 7 groups based on their genome type and replication strategy. The groups include double-stranded DNA viruses, single-stranded DNA viruses, double-stranded RNA viruses, and different types of single-stranded RNA viruses. The document also discusses taxonomy based on other virus characteristics.
Viral replication by Kainat Ramzan-SlideShare
Virus multiplication are in Following steps: attached, penetration, biosynthesis, maturation, assembly and release and also discribe the life of Bacteriophage by following two life cycle
Present By Kainat Ramzan
General characteristics of virus
Viruses are the smallest infectious agents that can only replicate inside living host cells. They are metabolically inert and made up of either DNA or RNA surrounded by a protein coat called a capsid. Some viruses have an outer envelope as well. Viruses come in different shapes, sizes and structures depending on the symmetry of their capsids. They infect plants, animals and bacteria. Viruses replicate through lytic and lysogenic cycles where they take over the host cell machinery to produce new virus particles. While they exhibit some living properties like mutation and existing in different strains, viruses still lack many cellular functions and rely entirely on host cells for reproduction.
Viruses ppt
Viruses exist at the boundary between living and non-living things. They consist of nucleic acids and proteins but cannot reproduce outside of a host cell. Viruses come in different shapes and sizes and have unique structures suited to their method of infection. They hijack the machinery of living cells to reproduce either through lytic or lysogenic cycles, ultimately resulting in the destruction of the host cell. While viruses rely on host cells, they are not considered alive as they do not have their own metabolism or respond to their environment.
Chapter+5,+25,+37 (microbiology) 8th edition
Viruses are genetic elements that cannot replicate independently and cause many diseases. They come in various shapes and sizes and have either DNA or RNA genomes. Viruses infect all types of living organisms including bacteria, archaea, animals, and plants. They replicate inside host cells and can cause cell lysis or establish persistent infections. Important viral models include bacteriophages and retroviruses. Viruses display both lytic and lysogenic life cycles and use a variety of mechanisms to infect hosts and replicate their genomes.
Viruses
1) Viruses are non-living infectious particles that contain genetic material and a protein coat called a capsid. 2) Viruses can only replicate inside a host cell by injecting their genetic material and using the host cell's machinery. 3) Viruses exist in two states - as active viruses when infecting a host cell, or dormant virions when not in contact with a host.
Viral replication
The document discusses the process of viral replication. It begins with an introduction that defines viral replication as the production of all virus components through an assembly process rather than cellular division. It then describes the 7 key steps in viral replication: 1) Attachment, 2) Penetration, 3) Uncoating, 4) Genome replication, 5) Assembly, 6) Maturation, and 7) Release of new virus particles. The document concludes that while the details vary, all viruses follow a similar overall replication process to initiate infection, replicate their genomes, and release new virions.
Prokaryotes Virus APBio
Prokaryotes include bacteria and archaea. Bacteria come in various shapes and have diverse metabolic pathways. They reproduce through binary fission and exchange genetic material through conjugation. Archaea inhabit extreme environments like hot springs and saltwater. Viruses are parasites that infect cells and hijack their machinery to replicate. They are host-specific and have a protein coat surrounding their genetic material. Prions are infectious protein particles that cause fatal neurological diseases.
1 virus structure
This document discusses key concepts about viruses including their structure, classification, replication, and mechanisms of infection. The main points covered are:
- Viruses are obligate intracellular parasites that can only replicate inside host cells and are composed of nucleic acids surrounded by a protein capsid.
- They come in various shapes including spherical, rod-shaped, and helical and have either DNA or RNA genomes.
- Viruses hijack host cell machinery to produce new viral components and assemble them into progeny virus particles to infect new cells.
- They are classified based on properties like genome type, morphology, and replication mechanisms. Important human viruses like herpesviruses, coronaviruses, and HIV are discussed.
B.sc.1 viruses general characteristics
The document discusses key characteristics and properties of viruses. It notes that viruses are microscopic particles that infect cells and often destroy them. Viruses are smaller than bacteria, change rapidly, and there are many unknown types. Their small size and rapid mutation make viruses difficult to treat. The document then describes viruses as obligate intracellular parasites that are non-cellular, replicate by taking over host cell machinery, and lack their own metabolism or protein synthesis abilities. Finally, it briefly discusses virus shapes, taxonomy, and references used.
Viruses and prion
Viruses and prions are two types of infectious agents. Viruses are small microorganisms that infect other living organisms and consist of nucleic acid surrounded by a protein shell. They can cause oral diseases. Prions are proteinaceous particles that can self-replicate and induce neurodegenerative diseases like Creutzfeldt-Jakob disease in humans after a long incubation period. They are highly resistant to inactivation.
What's hot (20)
Similar to Introduction to Viruses
Virus
This document discusses microbes, pathogens, viruses, and viral diseases. It begins by defining microbes and pathogens, noting that microbiology studies microorganisms responsible for common diseases. It then describes viruses, explaining that they are non-living particles that invade and reproduce inside living cells using the cell's genetic material and processes. The document outlines the basic parts of viruses and how they hijack cells, causing the cell to explode and release new virus copies to infect other cells. It notes that viruses cannot live without a host cell and do not have the characteristics of living things. In the end, it lists some common viral diseases caused by cell damage or death.
Viruses-definition, classification, replication, cultivation of viruses
Viruses-definition, classification, replication, cultivation of virusesDepartment of Pharmaceutics
Pravara Rural College of Pharmacy Loni
Virus science ii_bimester
Viruses are non-living particles that enter and reproduce inside living cells. They act as parasites and cannot grow or produce energy on their own. Viruses have either DNA or RNA as their genetic material surrounded by a protein coat and sometimes a membrane envelope with surface proteins. These surface proteins help viruses invade host cells. While viruses can cause disease, they can also be used to treat and prevent illnesses through vaccines where a weakened form of the virus is introduced to the body to produce antibodies without causing disease.
b-150112001834-conversion-gate02.pptx
Viruses are non-living infectious agents that contain genetic material (DNA or RNA) surrounded by a protein coat called a capsid. They can only replicate inside living host cells by hijacking the cell's machinery. Viruses come in different shapes and sizes, and some have an outer envelope. They infect bacteria, plants, and animals. To replicate, viruses enter cells, release their genetic material, and use the cell to produce new virus particles, which then exit and infect new host cells.
Viruses
Viruses are non-living particles composed of nucleic acids surrounded by a protein coat. They can only replicate by infecting a living host cell. A virus attaches to and enters a host cell, then uses the cell's machinery to produce copies of itself. It has two replication cycles - lytic causes the cell to burst and release new viruses, lysogenic integrates viral DNA into the host without immediately taking it over. Integrated viral DNA can cause later reoccurrence of diseases like cold sores or shingles.
2.1 viruses Ontario curriculum biology 11.ppt
Viruses have characteristics of both living and non-living entities. They cannot reproduce or carry out life functions without a host cell. Viruses consist of genetic material surrounded by a protein coat and require a host cell to replicate. There are two cycles of viral replication - lytic and lysogenic. In the lytic cycle, viruses destroy the host cell to release new virus particles, while in the lysogenic cycle viruses can integrate their genetic material into the host cell's genome and remain dormant for years. Prions are an unusual type of infectious agent composed solely of protein that can self-replicate and cause neurodegenerative diseases like mad cow disease. While viruses cause diseases, they also have beneficial uses including in vaccinations
(Introduction to Virology)- نور احمد المزيني.pptx
Viruses are small infectious agents that can only replicate inside host cells. They are composed of nucleic acid, either DNA or RNA, surrounded by a protein coat called a capsid. Some viruses also have an outer envelope. Viruses infect cells through attachment to specific receptors and undergo a replication cycle of entry, uncoating, gene expression/replication, assembly, and release of new virus particles. The capsid comes in two symmetries, helical or cubic, and determines how the protein subunits are arranged. Viruses infect all types of cells and have no metabolism of their own outside a host.
Virus slides
Viruses are the smallest microorganisms that can only replicate inside host cells. They consist of nucleic acid surrounded by a protein coat. Viruses are obligate intracellular parasites and are not considered living organisms as they cannot reproduce, grow, or metabolize on their own. The virus reproduction process involves the virus attaching to and entering a host cell, releasing its nucleic acid, using the host cell to produce more virus nucleic acid and proteins, assembling new virus particles, and bursting out to infect more cells. Common viral diseases include influenza, mumps, chickenpox, smallpox, polio, rabies, German measles, and viral meningitis.
Presentation 0n virus (09 12-2014)
Definition of virus
General properties of virus
Size
Structure
Classification
Morphology and
Multiplication 0f viruses
Presentation virus (09 12-2014)
Definition of virus
General properties of virus
Size
Structure
Classification
Morphology and
Multiplication 0f viruses
Virus
This document provides an overview of viruses, including their size, structure, classification, and life cycle. Key points include:
- Viruses are 10-100 times smaller than bacteria and can only be seen with an electron microscope. They contain either DNA or RNA and lack their own metabolism.
- Viruses are classified based on the organism they infect (bacteria, plants, animals), their nucleic acid content, the organ or system affected in humans, their capsid morphology, and whether they have an envelope.
- Viruses range in size from 20-300nm and are composed of a core of nucleic acid surrounded by a protein coat called a capsid, which may be enveloped. They reproduce through a complex process
The virus
Viruses are intracellular parasites that can only replicate inside living host cells. They are smaller than bacteria and consist of genetic material surrounded by a protein coat. There are three main classes of viruses: bacteriophages, plant viruses, and animal viruses. Viruses infect cells through attachment, penetration, uncoating, and then use the host cell's machinery to produce new viral components and assemble complete virions which are then released to infect new host cells. The replication cycle can be lytic, causing host cell death, or lysogenic where the viral genome remains dormant inside the host chromosome. Tissue culture is now widely used to cultivate and study viruses.
General virology.pptx
Viruses are small infectious particles that can only replicate inside living host cells. They contain genetic material in the form of DNA or RNA surrounded by a protein coat called a capsid. Some viruses have an outer envelope. Viruses are classified based on their nucleic acid, host species, symmetry, and presence of an envelope. Examples of DNA virus families include Herpesviridae and Adenoviridae, while common RNA virus families are Orthomyxoviridae, Paramyxoviridae, and Picornaviridae. Viruses infect all life forms and are obligate intracellular parasites.
BACTERIOPHAGE.pptx
introduction of bacteriophage , discovery, morphology, structure and life cycle of bacteriophage,
imp. of bacteriophage and other briefly define lytic and lysogenic cycle.
Basic microbiology aid nurses
This document provides an overview of basic microbiology. It defines microbiology as the study of microorganisms that cannot be seen with the naked eye, including bacteria, viruses, protozoa, and fungi. It classifies microorganisms and describes bacterial cell structure and types, modes of bacterial reproduction, and viral replication. It also discusses factors affecting microbial growth and types of infections.
ocular Microbiology virus and fungi dr.mohammed
Viruses have distinct characteristics including being very small, lacking nuclei and cellular organization, and requiring host cells for replication. DNA viruses of ocular importance include pox viruses like molluscum contagiosum, human papillomavirus which can cause warts or cancer, and herpes viruses. Herpes simplex virus causes conjunctivitis and keratitis while varicella zoster virus causes chickenpox and shingles. Cytomegalovirus can cause retinitis in immunosuppressed individuals. Epstein-Barr virus causes infectious mononucleosis.
Vaccines and its types
Vaccines work by exposing the immune system to antigens from a pathogen. This stimulates the body to develop antibodies that recognize and fight the pathogen if exposed in the future. There are several types of vaccines including live attenuated, inactivated, subunit, toxoid, conjugate, DNA, and recombinant vector vaccines. DNA vaccines and recombinant vector vaccines are experimental and involve introducing microbial DNA into cells to produce antigens and stimulate an immune response. Saponins from the bark of the Quillaja saponaria tree have shown promise as vaccine adjuvants by enhancing immune responses. Further research aims to develop safe and effective vaccines such as an HIV vaccine.
Which of the following appeared last in the course of animal evoluti.pdf
Which of the following appeared last in the course of animal evolution?
nerve net
coelom
notochord
4 chambered heart
amniotic egg
2. Antibodies against polioviruses can prevent the disease because
1. the antibodies bind to the viral particles and prevent the viral particles to attach to the
receptors on host cells
2. the antibodies can bind to host cells and protect the host cells from the virus
3. the antibodies kill all host cells that are infected by the virus
4. the antibodies directly break down the viral particles
Which of the following is true about bacterial endospores?
1. Endospores are very resistant to heat.
2. Endospores can be easily inactivated by disinfectants.
3. One bacterial cell can produce many endospores.
4. Endospores can germinate and grow in environment without water and nutrients..
Poliovirus
Poliovirus is an enterovirus that causes the acute infectious disease poliomyelitis. It is spherical and 27nm in diameter with an icosahedral capsid containing its single-stranded RNA genome. It infects and replicates in the intestinal tract and sometimes spreads to the central nervous system, destroying motor neurons and potentially causing flaccid paralysis. While most infections are asymptomatic, it can cause a range of illnesses from minor to paralytic. Diagnosis involves isolating the virus from specimens through cell culture and identification, and treatment involves vaccination to develop protective antibodies.
Similar to Introduction to Viruses (20)
Viruses-definition, classification, replication, cultivation of viruses
Viruses-definition, classification, replication, cultivation of viruses
Which of the following appeared last in the course of animal evoluti.pdf
Which of the following appeared last in the course of animal evoluti.pdf
Recently uploaded
Constructing Your Course Container for Effective Communication
Communicating effectively and consistently with students can help them feel at ease during their learning experience and provide the instructor with a communication trail to track the course's progress. This workshop will take you through constructing an engaging course container to facilitate effective communication.
Bed Making ( Introduction, Purpose, Types, Articles, Scientific principles, N...
Topic : Bed making
Subject : Nursing Foundation
Hindi varnamala | hindi alphabet PPT.pdf
हिंदी वर्णमाला पीपीटी, hindi alphabet PPT presentation, hindi varnamala PPT, Hindi Varnamala pdf, हिंदी स्वर, हिंदी व्यंजन, sikhiye hindi varnmala, dr. mulla adam ali, hindi language and literature, hindi alphabet with drawing, hindi alphabet pdf, hindi varnamala for childrens, hindi language, hindi varnamala practice for kids, https://www.drmullaadamali.com
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...Nguyen Thanh Tu Collection
https://app.box.com/s/tacvl9ekroe9hqupdnjruiypvm9rdaneclinical examination of hip joint (1).pdf
described clinical examination all orthopeadic conditions .
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) Curriculum
(𝐓𝐋𝐄 𝟏𝟎𝟎) (𝐋𝐞𝐬𝐬𝐨𝐧 𝟏)-𝐏𝐫𝐞𝐥𝐢𝐦𝐬
𝐃𝐢𝐬𝐜𝐮𝐬𝐬 𝐭𝐡𝐞 𝐄𝐏𝐏 𝐂𝐮𝐫𝐫𝐢𝐜𝐮𝐥𝐮𝐦 𝐢𝐧 𝐭𝐡𝐞 𝐏𝐡𝐢𝐥𝐢𝐩𝐩𝐢𝐧𝐞𝐬:
- Understand the goals and objectives of the Edukasyong Pantahanan at Pangkabuhayan (EPP) curriculum, recognizing its importance in fostering practical life skills and values among students. Students will also be able to identify the key components and subjects covered, such as agriculture, home economics, industrial arts, and information and communication technology.
𝐄𝐱𝐩𝐥𝐚𝐢𝐧 𝐭𝐡𝐞 𝐍𝐚𝐭𝐮𝐫𝐞 𝐚𝐧𝐝 𝐒𝐜𝐨𝐩𝐞 𝐨𝐟 𝐚𝐧 𝐄𝐧𝐭𝐫𝐞𝐩𝐫𝐞𝐧𝐞𝐮𝐫:
-Define entrepreneurship, distinguishing it from general business activities by emphasizing its focus on innovation, risk-taking, and value creation. Students will describe the characteristics and traits of successful entrepreneurs, including their roles and responsibilities, and discuss the broader economic and social impacts of entrepreneurial activities on both local and global scales.
BBR 2024 Summer Sessions Interview Training
Qualitative research interview training by Professor Katrina Pritchard and Dr Helen Williams
Your Skill Boost Masterclass: Strategies for Effective Upskilling
Your Skill Boost Masterclass: Strategies for Effective UpskillingExcellence Foundation for South Sudan
Strategies for Effective Upskilling is a presentation by Chinwendu Peace in a Your Skill Boost Masterclass organisation by the Excellence Foundation for South Sudan on 08th and 09th June 2024 from 1 PM to 3 PM on each day.Mule event processing models | MuleSoft Mysore Meetup #47
Mule event processing models | MuleSoft Mysore Meetup #47
Event Link:- https://meetups.mulesoft.com/events/details/mulesoft-mysore-presents-mule-event-processing-models/
Agenda
● What is event processing in MuleSoft?
● Types of event processing models in Mule 4
● Distinction between the reactive, parallel, blocking & non-blocking processing
For Upcoming Meetups Join Mysore Meetup Group - https://meetups.mulesoft.com/mysore/YouTube:- youtube.com/@mulesoftmysore
Mysore WhatsApp group:- https://chat.whatsapp.com/EhqtHtCC75vCAX7gaO842N
Speaker:-
Shivani Yasaswi - https://www.linkedin.com/in/shivaniyasaswi/
Organizers:-
Shubham Chaurasia - https://www.linkedin.com/in/shubhamchaurasia1/
Giridhar Meka - https://www.linkedin.com/in/giridharmeka
Priya Shaw - https://www.linkedin.com/in/priya-shaw
Advanced Java[Extra Concepts, Not Difficult].docx
This is part 2 of my Java Learning Journey. This contains Hashing, ArrayList, LinkedList, Date and Time Classes, Calendar Class and more.
Wound healing PPT
This document provides an overview of wound healing, its functions, stages, mechanisms, factors affecting it, and complications.
A wound is a break in the integrity of the skin or tissues, which may be associated with disruption of the structure and function.
Healing is the body’s response to injury in an attempt to restore normal structure and functions.
Healing can occur in two ways: Regeneration and Repair
There are 4 phases of wound healing: hemostasis, inflammation, proliferation, and remodeling. This document also describes the mechanism of wound healing. Factors that affect healing include infection, uncontrolled diabetes, poor nutrition, age, anemia, the presence of foreign bodies, etc.
Complications of wound healing like infection, hyperpigmentation of scar, contractures, and keloid formation.
Recently uploaded (20)
Constructing Your Course Container for Effective Communication
Constructing Your Course Container for Effective Communication
Bed Making ( Introduction, Purpose, Types, Articles, Scientific principles, N...
Bed Making ( Introduction, Purpose, Types, Articles, Scientific principles, N...
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) Curriculum
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) Curriculum
spot a liar (Haiqa 146).pptx Technical writhing and presentation skills
spot a liar (Haiqa 146).pptx Technical writhing and presentation skills
Your Skill Boost Masterclass: Strategies for Effective Upskilling
Your Skill Boost Masterclass: Strategies for Effective Upskilling
Mule event processing models | MuleSoft Mysore Meetup #47
Mule event processing models | MuleSoft Mysore Meetup #47
IGCSE Biology Chapter 14- Reproduction in Plants.pdf
IGCSE Biology Chapter 14- Reproduction in Plants.pdf
Introduction to Viruses
- 1. An Introduction to Viruses
- 3. The Definition An infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host
- 5. The Definition An infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host
- 7. Let's see this in action!
- 8. Let’s Recap 1. An infector 2. No cells but has DNA protected by a shield of proteins 3. Cannot reproduce on its own- needs a host 4. Really, really, really small
- 16. Five Traits of Life 1. Be made of 1 or more cells 2. Have a metabolism 3. Grow, develop, & evolve 4. Reproduce 5. Respond to stimuli
- 19. No matter if you think viruses are alive or not, we need to protect ourselves
- 20. Two Options