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Bacteria and viruses differ in several key ways. Bacteria are single-celled organisms that can reproduce through fission and contain DNA within a cell membrane and cell wall. Viruses are not considered living and lack cells, existing as strands of DNA or RNA within a protein coat. While antibiotics can treat bacterial infections, viruses require vaccines or antiviral drugs to prevent or slow their reproduction. Common methods of disease transmission include person-to-person contact through hands or saliva, exposure to contaminated bodily fluids, and inhalation of virus-containing airborne droplets from coughs or sneezes.
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Viruses
Viruses are non-living particles that contain genetic material surrounded by a protein coating. They cannot replicate without infecting a living host cell. There are two types of viral infections - active infections immediately produce new viruses and destroy the host cell, while latent infections incorporate viral DNA into the host cell's DNA without immediate damage. Viruses spread through the air or contact and only infect specific cell types. While antibiotics do not affect viruses, vaccines provide immunity by exposing the body to weakened viral particles. Researchers also study viruses to develop gene therapy and antiviral drugs.
Virus ppt
This document is a presentation about viruses given by Mudassar Ayyub to Sir Hassaan for an environmental science class. It defines viruses as submicroscopic parasites that often cause disease and consist of genetic material surrounded by a protein coat. It describes the basic structure of viruses, which all have a capsid and nucleic acid, and some have tail fibers. It explains that viruses cannot reproduce without a host cell and discusses their replication process. It also notes that viruses and bacteria can spread through similar means such as coughing, sneezing, or touching.
Bacterial & Viral Reproduction
Viruses multiply by entering a host cell and forcing it to produce more viruses. There are two ways viruses can multiply - actively, where the host cell is destroyed as it produces new viruses, or latently, where the viral DNA incorporates into the host cell's DNA and is copied as the cell divides without immediately destroying the cell. Vaccines work by introducing a weakened form of the virus to stimulate an immune response and prevent disease from the full virus.
How disease spreads student version
The document discusses various topics related to disease transmission and prevention. It defines infectious and non-infectious diseases, and outlines three main ways diseases can spread: through air, food, water; vectors; and person to person contact. Prevention methods are provided for each transmission category. Key terms are defined, such as epidemic, pandemic, carrier, and sexually transmitted diseases. Students are directed to practice the vocabulary and complete an exit ticket quiz.
Biochemistry of covid19
An attempt done out of concern about health of colleagues and friends amid COVID19 with the help of ACS, SPRINGER, PUBMED
Viruses and coronavirus
Viruses are sub-microscopic particles that can infect all types of life forms. They are made up of genetic material and protein and require a host cell to multiply. Coronaviruses are named for their spiky surface projections and can cause illnesses ranging from the common cold to SARS. COVID-19, which emerged in China in late 2019, is a new type of coronavirus. Coronaviruses originate in animals and some have the ability to transmit between animals and humans. Viral infections occur when a virus reproduces inside the body, potentially causing tissue damage and weakening the immune system.
Virus
A virus is an infectious agent made up of nucleic acid wrapped in a protein coat called a capsid. Viruses have no cell structure of their own and rely on hijacking the cellular machinery of host cells to replicate. They are parasites that infect organisms like bacteria and humans and can cause diseases like HIV. Viruses either contain DNA or RNA but not both and reproduce by injecting their nucleic acid into host cells to replicate their components and assemble new viral particles.
Viruses
This document summarizes key information about viruses and bacteria from a biology chapter 17 presentation. It defines viruses as non-cellular particles composed of genetic material and protein that can invade living cells. It lists many common viral diseases such as the cold, flu, smallpox, measles, and AIDS. The document also explains that viruses are transmitted through coughing, sneezing, touching contaminated surfaces, and sharing of body fluids.
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Viruses
Viruses are non-living particles that contain genetic material surrounded by a protein coating. They cannot replicate without infecting a living host cell. There are two types of viral infections - active infections immediately produce new viruses and destroy the host cell, while latent infections incorporate viral DNA into the host cell's DNA without immediate damage. Viruses spread through the air or contact and only infect specific cell types. While antibiotics do not affect viruses, vaccines provide immunity by exposing the body to weakened viral particles. Researchers also study viruses to develop gene therapy and antiviral drugs.
Virus ppt
This document is a presentation about viruses given by Mudassar Ayyub to Sir Hassaan for an environmental science class. It defines viruses as submicroscopic parasites that often cause disease and consist of genetic material surrounded by a protein coat. It describes the basic structure of viruses, which all have a capsid and nucleic acid, and some have tail fibers. It explains that viruses cannot reproduce without a host cell and discusses their replication process. It also notes that viruses and bacteria can spread through similar means such as coughing, sneezing, or touching.
Bacterial & Viral Reproduction
Viruses multiply by entering a host cell and forcing it to produce more viruses. There are two ways viruses can multiply - actively, where the host cell is destroyed as it produces new viruses, or latently, where the viral DNA incorporates into the host cell's DNA and is copied as the cell divides without immediately destroying the cell. Vaccines work by introducing a weakened form of the virus to stimulate an immune response and prevent disease from the full virus.
How disease spreads student version
The document discusses various topics related to disease transmission and prevention. It defines infectious and non-infectious diseases, and outlines three main ways diseases can spread: through air, food, water; vectors; and person to person contact. Prevention methods are provided for each transmission category. Key terms are defined, such as epidemic, pandemic, carrier, and sexually transmitted diseases. Students are directed to practice the vocabulary and complete an exit ticket quiz.
Biochemistry of covid19
An attempt done out of concern about health of colleagues and friends amid COVID19 with the help of ACS, SPRINGER, PUBMED
Viruses and coronavirus
Viruses are sub-microscopic particles that can infect all types of life forms. They are made up of genetic material and protein and require a host cell to multiply. Coronaviruses are named for their spiky surface projections and can cause illnesses ranging from the common cold to SARS. COVID-19, which emerged in China in late 2019, is a new type of coronavirus. Coronaviruses originate in animals and some have the ability to transmit between animals and humans. Viral infections occur when a virus reproduces inside the body, potentially causing tissue damage and weakening the immune system.
Virus
A virus is an infectious agent made up of nucleic acid wrapped in a protein coat called a capsid. Viruses have no cell structure of their own and rely on hijacking the cellular machinery of host cells to replicate. They are parasites that infect organisms like bacteria and humans and can cause diseases like HIV. Viruses either contain DNA or RNA but not both and reproduce by injecting their nucleic acid into host cells to replicate their components and assemble new viral particles.
Viruses
This document summarizes key information about viruses and bacteria from a biology chapter 17 presentation. It defines viruses as non-cellular particles composed of genetic material and protein that can invade living cells. It lists many common viral diseases such as the cold, flu, smallpox, measles, and AIDS. The document also explains that viruses are transmitted through coughing, sneezing, touching contaminated surfaces, and sharing of body fluids.
Presentation virus
1. The document discusses the history and classification of viruses. Viruses were first observed in 1883 by Dmitri Ivanovsky who discovered virus-like organisms in tobacco plants while studying disease spots using an electron microscope.
2. Viruses can be classified as either living or non-living. They are considered living because they can reproduce, but non-living because they lack a cell structure and can be crystallized.
3. Examples are given of viruses that cause diseases in humans like measles, AIDS, dengue fever, and influenza. The symptoms and transmission methods of each virus are briefly described.
Viruses in reptiles
There are many viruses that infect reptiles from different virus families such as Herpesviridae, Paramyxoviridae, Poxviridae, Adenoviridae, Papillomaviridae, Reoviridae, and Arboviruses. Many of these viruses cause respiratory, skin, or neurological symptoms in reptiles. However, little is known about the transmission and diseases caused by reptilian viruses due to the low commercial value of reptiles and difficulties in research.
Virus and bacteria
Viruses and bacteria are both infectious agents, but they differ in key ways. Viruses are not cells and can only replicate inside host cells, while bacteria are unicellular organisms. Common ways viruses spread include through blood-sucking insects, coughing/sneezing, fecal-oral transmission, sexual contact, and exposure to infected blood. The immune system fights viral infections to eliminate the virus. Bacteria exist in nearly every habitat and environment, and while most bacteria in our bodies are harmless, some species can cause infectious diseases in humans. Bacteria also have important industrial uses like sewage treatment and antibiotic production.
Coronavirus
Coronavirus is a type of virus that causes the disease COVID-19. It originated in a market in Wuhan, China in December 2019 and has since spread globally. The coronavirus spike protein mediates entry into host cells by binding to receptors on the cell surface and fusing viral and host membranes. It infects cells by first binding to receptors and then fusing its membrane with the host cell membrane. Basic prevention methods include frequent hand washing, physical distancing, wearing a mask, and avoiding touching the face.
Baculovirus npv
Baculoviruses are pathogens that infect insects and other arthropods. They are small, double-stranded DNA viruses. The Nuclear polyhedrosis virus (NPV) is a baculovirus that infects insects like moths and butterflies. It forms an extremely stable crystal capsule called the occlusion body that protects the virus in the environment. When an insect eats a contaminated plant, the alkaline environment of its gut dissolves the occlusion body and releases virus particles that infect the gut cells. The virus then replicates rapidly within the host's cells until it dies, filled with new virus particles. NPV spreads by infected insects shedding virus crystals that can then infect other insects.
Viruses
Viruses are non-living particles that can only reproduce inside living cells. They come in various shapes and sizes, with diameters ranging from 20-200 nanometers. Viruses are classified as parasites because they destroy the host cell during reproduction. They have either a protein coat containing genetic material or a protein coat surrounding an inner core and genetic material. Viruses attach and enter host cells using unique proteins that match receptors on certain host cell types. Once inside, the virus takes over the cell's functions to produce more viral proteins and genetic material, filling the cell until it bursts and releases new viruses. Some viruses remain dormant inside the host cell's DNA until certain triggers cause them to become active again.
Virology
Virology is a division of science, which concentrates on the study of viruses and organisms which act like bacteria, such as prions and viroids.
Bacteria viruses
This document provides information about bacteria and viruses from a biology class. It defines bacteria as prokaryotic, unicellular organisms that have all the characteristics of living things. Viruses are not considered living as they require a host cell to replicate. The document outlines the structures of bacteria and viruses and how they cause disease. It describes how antibiotics can treat bacterial but not viral infections, while antivirals and vaccinations can respectively treat and prevent certain viral infections. The best way to avoid sickness is emphasized as practicing good hygiene.
Virus discovery
virus introduction, discovery and scientists involved in discovery of different viruses. evolution of virology
Disease
This document discusses disease and its treatment. It defines disease as any condition that prevents effective functioning in an organism. Diseases are classified as either hereditary/congenital, meaning they are present at birth, or acquired, meaning they develop after birth. Acquired diseases include infectious diseases caused by living organisms, diet/deficiency diseases from too much or too little nutrients, cancers from uncontrolled cell growth, occupational diseases from work environments, and heart diseases from risk factors like smoking. The document also discusses infectious diseases in more depth, how they are spread, treated with antibiotics or prevented through immunization, and how the immune system and its defenses work to fight disease.
General properties of viruses
Viruses are microscopic organisms that exist almost everywhere on earth. They can infect animals, plants, fungi, and even bacteria.Viruses vary in complexity. They consist of genetic material, RNA or DNA, surrounded by a coat of protein, lipid (fat), or glycoprotein. Viruses cannot replicate without a host, so they are classified as parasitic.They are considered the most abundant biological entity on the planet.
Here we discuss the general properties of viruses in detail.
Virus ( bhsa inggris biologi ),, nor azizah
The document discusses viruses, describing them as microscopic parasites that infect organisms and contain genetic material like DNA or RNA. It explains that viruses have characteristics of both living and nonliving things, and notes the structures of viruses can consist of a head, neck, foot and tail. Finally, it provides examples of the roles viruses play in human life, both beneficial by producing vaccines and harmful by causing diseases like influenza.
Chapter 20 notes
Bacteria and viruses are found everywhere on Earth. Bacteria are prokaryotic cells that can be rod-shaped, spiral-shaped, or circular. They reproduce through binary fission or conjugation. Viruses are non-living particles that contain DNA or RNA and reproduce by taking over host cells and forcing them to make more viruses. Bacteria and viruses cause many diseases in humans, but bacteria can also be beneficial as decomposers and in food processing, while vaccines can prevent viral infections.
Structure of viruses
The document summarizes key information about viruses, including their discovery, structure, and characteristics. It provides details on different virus shapes (helical, polyhedral, complex) and structures. Specific viruses discussed include tobacco mosaic virus (TMV), adenovirus, bacteriophage T4, and their components. Viruses are described as ultramicroscopic particles that can only be seen with electron microscopes and vary greatly in size and shape. They contain nucleic acids and infect host cells to reproduce.
Microbes
Microbes are tiny organisms that can only be seen with a microscope. They are found everywhere in the environment and inside and on humans and animals. While most microbes are harmless or beneficial, some can cause illness. There are more microbes on the human body and in soil and oceans than any other type of organism. The three main types of microbes are bacteria, viruses, and fungi. Microbes play a vital role in ecosystems by decomposing waste, generating oxygen, and participating in nutrient cycles. They also aid in food production and help break down food in human and animal digestive systems.
structure morphology_of_viruses
Viruses have a basic structure consisting of nucleic acid surrounded by a protein coat called a capsid. Some viruses have an additional phospholipid envelope. Viruses come in a few different symmetries for their capsids including icosahedral, helical, binal, and complex. Icosahedral capsids can be enveloped or non-enveloped while helical capsids are long and spiral-shaped. Binal symmetry combines icosahedral and helical features with a head and tail. Complex symmetry refers to asymmetrical virus structures.
PP_less_V_chopra
The document discusses microbiology and microorganisms. It defines microbiology as the study of organisms too small to see without magnification, including bacteria, viruses, fungi, protozoa, and helminthes. It notes that bacteria are very tiny, around 1-2 micrometers in size. The document outlines some key figures in the field, including Antonie van Leeuwenhoek who first observed microbes under magnification, and Louis Pasteur who demonstrated germ theory and developed pasteurization. It also discusses how microorganisms are identified, measured, and classified, and notes that while some are pathogens and cause disease, many are beneficial and help with processes like nutrient production and decomposition.
Virology: study of virus
Virology is the study of viruses, which are submicroscopic particles that contain genetic material within a protein coat. It focuses on virus structure, classification, evolution, infection of host cells, interaction with host physiology and immunity, diseases caused, isolation and culture techniques, and application in research and therapy. Viruses can be classified according to the nucleic acid type that makes up their genome and how they replicate - including DNA viruses, RNA viruses, and reverse transcribing viruses. Major branches of virology include classification of animal viruses, plant viruses, and bacteriophages.
Rabies
Rabies is a virus usually spread through the saliva of an infected animal that attacks the central nervous system. It can be transmitted through biting, contact with bats or infected animals, or human-to-human transmission. While all mammals can be infected, the most common carriers are bats, raccoons, skunks, foxes and coyotes. The incubation period varies but initial symptoms include irritability and pain at the exposure site, progressing to paralysis, spasms and death if not treated before symptoms appear. Rabies can be prevented through vaccination and treated effectively if medical care is received early after exposure or onset of symptoms.
viruses_tobacco mosaic virus First semester part_1
1. Viruses are non-living infectious agents that can only replicate inside host cells. They contain genetic material in the form of DNA or RNA surrounded by a protein coat.
2. Early experiments in the late 19th century demonstrated that certain disease-causing agents could be transmitted between hosts and passed through filters, establishing the existence of viruses.
3. Viruses come in a variety of shapes and sizes but are generally quite small, usually between 20-300 nanometers. Their structure includes a nucleic acid core and protein coat called a capsid, which is composed of repeating protein subunits called capsomeres.
2. methode podiumkunsten rosamin pothof
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Presentation virus
1. The document discusses the history and classification of viruses. Viruses were first observed in 1883 by Dmitri Ivanovsky who discovered virus-like organisms in tobacco plants while studying disease spots using an electron microscope.
2. Viruses can be classified as either living or non-living. They are considered living because they can reproduce, but non-living because they lack a cell structure and can be crystallized.
3. Examples are given of viruses that cause diseases in humans like measles, AIDS, dengue fever, and influenza. The symptoms and transmission methods of each virus are briefly described.
Viruses in reptiles
There are many viruses that infect reptiles from different virus families such as Herpesviridae, Paramyxoviridae, Poxviridae, Adenoviridae, Papillomaviridae, Reoviridae, and Arboviruses. Many of these viruses cause respiratory, skin, or neurological symptoms in reptiles. However, little is known about the transmission and diseases caused by reptilian viruses due to the low commercial value of reptiles and difficulties in research.
Virus and bacteria
Viruses and bacteria are both infectious agents, but they differ in key ways. Viruses are not cells and can only replicate inside host cells, while bacteria are unicellular organisms. Common ways viruses spread include through blood-sucking insects, coughing/sneezing, fecal-oral transmission, sexual contact, and exposure to infected blood. The immune system fights viral infections to eliminate the virus. Bacteria exist in nearly every habitat and environment, and while most bacteria in our bodies are harmless, some species can cause infectious diseases in humans. Bacteria also have important industrial uses like sewage treatment and antibiotic production.
Coronavirus
Coronavirus is a type of virus that causes the disease COVID-19. It originated in a market in Wuhan, China in December 2019 and has since spread globally. The coronavirus spike protein mediates entry into host cells by binding to receptors on the cell surface and fusing viral and host membranes. It infects cells by first binding to receptors and then fusing its membrane with the host cell membrane. Basic prevention methods include frequent hand washing, physical distancing, wearing a mask, and avoiding touching the face.
Baculovirus npv
Baculoviruses are pathogens that infect insects and other arthropods. They are small, double-stranded DNA viruses. The Nuclear polyhedrosis virus (NPV) is a baculovirus that infects insects like moths and butterflies. It forms an extremely stable crystal capsule called the occlusion body that protects the virus in the environment. When an insect eats a contaminated plant, the alkaline environment of its gut dissolves the occlusion body and releases virus particles that infect the gut cells. The virus then replicates rapidly within the host's cells until it dies, filled with new virus particles. NPV spreads by infected insects shedding virus crystals that can then infect other insects.
Viruses
Viruses are non-living particles that can only reproduce inside living cells. They come in various shapes and sizes, with diameters ranging from 20-200 nanometers. Viruses are classified as parasites because they destroy the host cell during reproduction. They have either a protein coat containing genetic material or a protein coat surrounding an inner core and genetic material. Viruses attach and enter host cells using unique proteins that match receptors on certain host cell types. Once inside, the virus takes over the cell's functions to produce more viral proteins and genetic material, filling the cell until it bursts and releases new viruses. Some viruses remain dormant inside the host cell's DNA until certain triggers cause them to become active again.
Virology
Virology is a division of science, which concentrates on the study of viruses and organisms which act like bacteria, such as prions and viroids.
Bacteria viruses
This document provides information about bacteria and viruses from a biology class. It defines bacteria as prokaryotic, unicellular organisms that have all the characteristics of living things. Viruses are not considered living as they require a host cell to replicate. The document outlines the structures of bacteria and viruses and how they cause disease. It describes how antibiotics can treat bacterial but not viral infections, while antivirals and vaccinations can respectively treat and prevent certain viral infections. The best way to avoid sickness is emphasized as practicing good hygiene.
Virus discovery
virus introduction, discovery and scientists involved in discovery of different viruses. evolution of virology
Disease
This document discusses disease and its treatment. It defines disease as any condition that prevents effective functioning in an organism. Diseases are classified as either hereditary/congenital, meaning they are present at birth, or acquired, meaning they develop after birth. Acquired diseases include infectious diseases caused by living organisms, diet/deficiency diseases from too much or too little nutrients, cancers from uncontrolled cell growth, occupational diseases from work environments, and heart diseases from risk factors like smoking. The document also discusses infectious diseases in more depth, how they are spread, treated with antibiotics or prevented through immunization, and how the immune system and its defenses work to fight disease.
General properties of viruses
Viruses are microscopic organisms that exist almost everywhere on earth. They can infect animals, plants, fungi, and even bacteria.Viruses vary in complexity. They consist of genetic material, RNA or DNA, surrounded by a coat of protein, lipid (fat), or glycoprotein. Viruses cannot replicate without a host, so they are classified as parasitic.They are considered the most abundant biological entity on the planet.
Here we discuss the general properties of viruses in detail.
Virus ( bhsa inggris biologi ),, nor azizah
The document discusses viruses, describing them as microscopic parasites that infect organisms and contain genetic material like DNA or RNA. It explains that viruses have characteristics of both living and nonliving things, and notes the structures of viruses can consist of a head, neck, foot and tail. Finally, it provides examples of the roles viruses play in human life, both beneficial by producing vaccines and harmful by causing diseases like influenza.
Chapter 20 notes
Bacteria and viruses are found everywhere on Earth. Bacteria are prokaryotic cells that can be rod-shaped, spiral-shaped, or circular. They reproduce through binary fission or conjugation. Viruses are non-living particles that contain DNA or RNA and reproduce by taking over host cells and forcing them to make more viruses. Bacteria and viruses cause many diseases in humans, but bacteria can also be beneficial as decomposers and in food processing, while vaccines can prevent viral infections.
Structure of viruses
The document summarizes key information about viruses, including their discovery, structure, and characteristics. It provides details on different virus shapes (helical, polyhedral, complex) and structures. Specific viruses discussed include tobacco mosaic virus (TMV), adenovirus, bacteriophage T4, and their components. Viruses are described as ultramicroscopic particles that can only be seen with electron microscopes and vary greatly in size and shape. They contain nucleic acids and infect host cells to reproduce.
Microbes
Microbes are tiny organisms that can only be seen with a microscope. They are found everywhere in the environment and inside and on humans and animals. While most microbes are harmless or beneficial, some can cause illness. There are more microbes on the human body and in soil and oceans than any other type of organism. The three main types of microbes are bacteria, viruses, and fungi. Microbes play a vital role in ecosystems by decomposing waste, generating oxygen, and participating in nutrient cycles. They also aid in food production and help break down food in human and animal digestive systems.
structure morphology_of_viruses
Viruses have a basic structure consisting of nucleic acid surrounded by a protein coat called a capsid. Some viruses have an additional phospholipid envelope. Viruses come in a few different symmetries for their capsids including icosahedral, helical, binal, and complex. Icosahedral capsids can be enveloped or non-enveloped while helical capsids are long and spiral-shaped. Binal symmetry combines icosahedral and helical features with a head and tail. Complex symmetry refers to asymmetrical virus structures.
PP_less_V_chopra
The document discusses microbiology and microorganisms. It defines microbiology as the study of organisms too small to see without magnification, including bacteria, viruses, fungi, protozoa, and helminthes. It notes that bacteria are very tiny, around 1-2 micrometers in size. The document outlines some key figures in the field, including Antonie van Leeuwenhoek who first observed microbes under magnification, and Louis Pasteur who demonstrated germ theory and developed pasteurization. It also discusses how microorganisms are identified, measured, and classified, and notes that while some are pathogens and cause disease, many are beneficial and help with processes like nutrient production and decomposition.
Virology: study of virus
Virology is the study of viruses, which are submicroscopic particles that contain genetic material within a protein coat. It focuses on virus structure, classification, evolution, infection of host cells, interaction with host physiology and immunity, diseases caused, isolation and culture techniques, and application in research and therapy. Viruses can be classified according to the nucleic acid type that makes up their genome and how they replicate - including DNA viruses, RNA viruses, and reverse transcribing viruses. Major branches of virology include classification of animal viruses, plant viruses, and bacteriophages.
Rabies
Rabies is a virus usually spread through the saliva of an infected animal that attacks the central nervous system. It can be transmitted through biting, contact with bats or infected animals, or human-to-human transmission. While all mammals can be infected, the most common carriers are bats, raccoons, skunks, foxes and coyotes. The incubation period varies but initial symptoms include irritability and pain at the exposure site, progressing to paralysis, spasms and death if not treated before symptoms appear. Rabies can be prevented through vaccination and treated effectively if medical care is received early after exposure or onset of symptoms.
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1. Viruses are non-living infectious agents that can only replicate inside host cells. They contain genetic material in the form of DNA or RNA surrounded by a protein coat.
2. Early experiments in the late 19th century demonstrated that certain disease-causing agents could be transmitted between hosts and passed through filters, establishing the existence of viruses.
3. Viruses come in a variety of shapes and sizes but are generally quite small, usually between 20-300 nanometers. Their structure includes a nucleic acid core and protein coat called a capsid, which is composed of repeating protein subunits called capsomeres.
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Microbes
Microbes are tiny organisms that are too small to see without a microscope. They are found everywhere and come in different shapes. The four major groups of microbes are bacteria, viruses, fungi, and protozoa. While some microbes cause disease, many are harmless or even beneficial to humans. Bacteria are single-celled microbes that can be round, rod-shaped, or spiral. Viruses are not cells and consist of genetic material surrounded by protein, and they cause disease by invading and taking over host cells. Fungi are primitive plants that include mushrooms and molds, and some fungi are useful in food production. Protozoa are single-celled animal-like microbes that usually cause disease
Virus
Viruses are non-living particles that can only reproduce inside host cells. They are much smaller than bacteria and come in various shapes. Viruses cause diseases like smallpox, influenza, and AIDS. They enter cells and use the cell's machinery to replicate themselves before destroying the cell. While viruses cannot live outside of a host, they have developed ways to spread between hosts, such as through respiratory droplets or animal vectors. The best ways to prevent viral spread are vaccination, good hygiene like handwashing, and avoiding contact with infected bodily fluids.
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Viruses exist in a boundary between living and non-living things. They cannot reproduce without infecting a host cell and using the cell's machinery. Viruses consist of genetic material surrounded by a protein coat, and sometimes an envelope. They infect all types of life from animals and plants to bacteria. While viruses disrupt hosts and cause disease, they also play important roles in evolution by transferring genes between organisms.
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Germs are microorganisms that can only be seen with a microscope. There are different types of germs including bacteria, viruses, fungi, and protozoa. Bacteria are single-celled organisms that can be helpful or harmful. Viruses are even smaller and can only reproduce inside living cells. Fungi are plant-like and get nutrients from other organisms. Protozoa are single-celled organisms that thrive in moist environments. Germs can spread through direct contact, contaminated food/water, airborne transmission, and contact with surfaces. Bacterial diseases are caused by bacteria and include diseases like tuberculosis, cholera, and tetanus. Viral diseases have different causes and symptoms and include diseases like
BTEC 4C: Infectious diseases and vaccines
The document discusses infectious diseases and how vaccination can prevent them. It defines a pathogen as a microorganism that causes disease and lists bacteria and viruses as examples. It describes how bacteria and viruses can enter the body and cause infectious diseases. It then explains how vaccinations work by exposing the body to inactive or dead forms of pathogens to allow the immune system to develop antibodies and memory cells to quickly fight off future infections without causing illness.
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Viruses come in a wide range of sizes but are generally quite small, ranging from 10-300 nm in diameter. They have either DNA or RNA as their genetic material and are unable to replicate without hijacking the cellular machinery of a host cell. Viruses can infect all manner of organisms, including humans, animals, plants, fungi, and bacteria. Some viruses are known to cause specific types of cancer in their hosts.
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Assignment on Infectious Diseases
This document discusses infectious diseases and their transmission. It notes that infectious diseases are a major global public health burden driven by socioeconomic, environmental, and ecological factors. The majority of emerging infectious diseases are zoonoses originating in wildlife, and over time there has been a significant increase in both the number and incidence of emerging infectious diseases. However, surveillance efforts focus more on countries less likely to be the source of new infectious diseases.
Viruses
This document provides an overview of viruses and viral diseases. It defines viruses as strands of DNA or RNA surrounded by protein that can only replicate inside host cells. Viruses are not considered alive since they lack characteristics of living things, like the ability to reproduce outside a host. The document describes how viruses cause diseases by destroying host cells during replication and release of new virus particles. It also discusses methods to treat and prevent viral diseases, including antiviral drugs and vaccines which trigger antibody production to develop immunity. The document concludes by noting scientists research viruses to develop new disease treatments and explore virus links to cancer.
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Pathogens are organisms that cause disease and include viruses, bacteria, fungi, and parasites. Viruses can cause infections like the common cold, flu, measles, hepatitis, HIV/AIDS, and more. Bacteria cause diseases like strep throat, UTIs, tuberculosis, gonorrhea, and others. Common fungal infections include ringworm, athlete's foot, and thrush. Parasitic diseases include malaria, giardiasis, and trichomoniasis. Pathogens spread through various means like contact, airborne particles, bodily fluids, contaminated food/water, insect bites, and more.
INFECTION PPT...pptx
The document discusses different types of infections and their modes of transmission. It defines infection as the lodgment and multiplication of a parasite in a host's tissues. Infections are classified as viral, bacterial, fungal, or parasitic. Viral infections involve a virus infiltrating and replicating within a host's cells. Bacterial infections are caused by bacteria that can enter through wounds or openings. Fungal infections are often mild but some can be serious. Parasitic infections involve protozoa or other parasites that thrive in moist environments. Infections can be transmitted directly from person to person through droplets, skin contact, or body fluids, or indirectly through vectors, contaminated objects, food/water, animals, or the environment
infectious agents
This document discusses the four main classes of infectious agents: bacteria, fungi, viruses, and parasites. It provides details about each type, including their characteristics, examples of diseases they cause, and how they are transmitted. Bacteria are single-celled organisms that can spread through various fluids or surfaces. Fungi are multi-cellular organisms like yeast and mushrooms that typically cause skin or lung infections. Viruses are the smallest and can only replicate inside host cells, spreading through various fluids, aerosols, or vectors. Parasites live in or on another organism and reproduce at their host's expense, with examples including roundworms, protozoa, tapeworms and flukes.
8.6_VIRAL DISEASE AN APPROACH.pptx
Viruses are very small infectious agents that can only replicate inside host cells. They contain genetic material (DNA or RNA) surrounded by a protein coat. There are many types of viral infections that affect different body systems like the respiratory, gastrointestinal, liver, nervous and skin. Respiratory viruses commonly cause infections like influenza and COVID-19. Some viruses are also associated with certain cancers through their ability to insert their genetic material into host cells. Proper hygiene practices, vaccination and antiviral treatment can help prevent and treat viral infections.
The 10 deadliest_diseases
The document summarizes 10 of the deadliest diseases in history. It provides brief descriptions of how each disease infects and spreads within the body, leading to symptoms and in many cases death. The top 3 deadliest diseases are described as:
1. HIV/AIDS, which attaches to white blood cells and uses them to reproduce more viruses, undermining the body's defenses.
2. Ebola, which is highly lethal because it starts rapidly multiplying right after infection via infected fluids, making a cure very difficult.
3. SARS, which invades the lungs after infection via droplets and multiplies there, causing respiratory symptoms.
Bacteria1
Bacteria are prokaryotic microorganisms that can have unique structures like capsules, pili, and flagella. They come in different shapes like coccus, bacillus, and spirillum. Some bacteria form endospores to survive harsh conditions. Bacteria play important environmental and digestive roles, and can be treated with antibiotics, disinfectants, heat or radiation. Viruses are not considered living and contain nucleic acids and proteins; they invade host cells to replicate and are transmitted through various means. Both bacteria and viruses can cause infectious diseases if not properly contained.
Bacteria and virus Notes
Bacteria are prokaryotic microorganisms that can have unique structures like capsules, pili, and flagella. They come in different shapes like coccus, bacillus, and spirillum. Some bacteria form endospores to survive extreme environmental conditions. Bacteria play important environmental and industrial roles like sewage disposal and genetic engineering. While some cause disease, others in the human body aid digestion and produce vitamins. Viruses consist of genetic material and proteins but are not living without a host cell. They invade hosts and hijack cellular mechanisms to replicate. Both bacteria and viruses can transmit diseases via various routes. Antibiotics treat bacterial but not viral infections.
Y8 Humans 10 infectious diseases
This document discusses infectious diseases and microbes. It explains that infectious diseases are caused by microorganisms like viruses, bacteria, and fungi. It defines disease and explains that microbes need food, water, and warmth to grow and replicate. It provides examples of how different diseases are spread, such as through contaminated food or water, coughs and sneezes, mosquito bites, or sexual contact.
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.
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Date: May 29, 2024
Tags: Information Security, ISO/IEC 27001, ISO/IEC 42001, Artificial Intelligence, GDPR
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- 1. 1. Salmonella thypii (bacteria) 2. Dengue Virus (virus) 3.
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