CH 19 Viruses Virus Discovery Viruses were detected indirectly long
... Viral diseases in a small isolated population can emerge and become global. New viral diseases can emerge when viruses spread from animals to humans. Viral strains that jump species can exchange genetic information with other viruses to which humans have no immunity. These strains can cause pandemic ...
... Viral diseases in a small isolated population can emerge and become global. New viral diseases can emerge when viruses spread from animals to humans. Viral strains that jump species can exchange genetic information with other viruses to which humans have no immunity. These strains can cause pandemic ...
File
... can be both good and bad bacteria in digestive system help digest food and make vitamins some bacteria produce toxins which kill cells bacteria are usually destroyed by the immune system ...
... can be both good and bad bacteria in digestive system help digest food and make vitamins some bacteria produce toxins which kill cells bacteria are usually destroyed by the immune system ...
Section 19-3 - Effingham County Schools
... 1. Attach-virus attaches to the surface of a cell 2. Inject- the hereditary material of the virus injects itself into the cell. 3. Copy-the viral DNA takes control of the cell and the cell begins to make new virus particles. 4. Assembles- viral particle are assembled into new viruses 5. Release-the ...
... 1. Attach-virus attaches to the surface of a cell 2. Inject- the hereditary material of the virus injects itself into the cell. 3. Copy-the viral DNA takes control of the cell and the cell begins to make new virus particles. 4. Assembles- viral particle are assembled into new viruses 5. Release-the ...
Bacteria / Virus ppt
... • Made of nucleic acid (DNA OR RNA), protein coat (capsid) and sometimes lipids • MUST enter living cells in order to reproduce • Very small • Range from a few to 100s of genes ...
... • Made of nucleic acid (DNA OR RNA), protein coat (capsid) and sometimes lipids • MUST enter living cells in order to reproduce • Very small • Range from a few to 100s of genes ...
HB_Agents_of_Disease_14_BH
... - Tend to infect specific cells - Virus kills host cell during its replication (lytic cycle) - Virus can insert sections of its genome into the host cell genome and lay dormant for an extended period of time (lysogenic cycle) ...
... - Tend to infect specific cells - Virus kills host cell during its replication (lytic cycle) - Virus can insert sections of its genome into the host cell genome and lay dormant for an extended period of time (lysogenic cycle) ...
Student Worksheets
... 7. Indicate which of the following statements are true or false. a. All viruses have the same shape. ...
... 7. Indicate which of the following statements are true or false. a. All viruses have the same shape. ...
Chapter 3: Viruses 第三章:病毒
... • Merck & Co. has stopped the Phase II trial of its V520 HIV vaccine after interim results showed that the vaccine was not effective and did not prevent infection. Viral Disease Treatment/Prevention ...
... • Merck & Co. has stopped the Phase II trial of its V520 HIV vaccine after interim results showed that the vaccine was not effective and did not prevent infection. Viral Disease Treatment/Prevention ...
3. Viruses 2010
... Human Health What makes viruses so challenging? 1. Most are difficult to treat and are not destroyed by sulfa drugs or antibiotics that have been so effective at treating bacterial illnesses. 2. Some viruses remain dormant for years before symptoms appear (due to the lysogenic cycle) ...
... Human Health What makes viruses so challenging? 1. Most are difficult to treat and are not destroyed by sulfa drugs or antibiotics that have been so effective at treating bacterial illnesses. 2. Some viruses remain dormant for years before symptoms appear (due to the lysogenic cycle) ...
Bacteria and Viruses
... Bacteriophage • Bacteriophages are viruses that infect bacteria • Bacteriophage – Head – capsid and DNA – Tail – with fibers to attach to ...
... Bacteriophage • Bacteriophages are viruses that infect bacteria • Bacteriophage – Head – capsid and DNA – Tail – with fibers to attach to ...
PowerPoint Presentation - Epidemiology and Prevention of
... host metabolic machinery to different extents, to form a pool of components which assemble into particles called virions. F Viruses cannot be grown on sterile media, but require the presence of specific host cells. ...
... host metabolic machinery to different extents, to form a pool of components which assemble into particles called virions. F Viruses cannot be grown on sterile media, but require the presence of specific host cells. ...
File
... A provirus is the viral gene that has been inserted into the host chromosome during the lysogenic cycle. A pathogen is any agent that causes disease. HIV is the name of the virus that causes AIDS. Individuals who have AIDS are unable to defend themselves against infections that do not normally occur ...
... A provirus is the viral gene that has been inserted into the host chromosome during the lysogenic cycle. A pathogen is any agent that causes disease. HIV is the name of the virus that causes AIDS. Individuals who have AIDS are unable to defend themselves against infections that do not normally occur ...
Viruses are used for gene therapy
... may be used to treat a brain tumor When the virus gets inside the brain, it seeks out the target tumor cells and invades them The tumor starts to produce herpes enzyme because the virus has inserted its genetic material into the tumor cells ...
... may be used to treat a brain tumor When the virus gets inside the brain, it seeks out the target tumor cells and invades them The tumor starts to produce herpes enzyme because the virus has inserted its genetic material into the tumor cells ...
Lecture 3 Virus
... - Reproduce only within a living host cell (obligate parasitism )تطفل إبجااري. - Each type of a virus infects a limited range of host cells (host range )مدى اإلصااة Viruses are host specific ...
... - Reproduce only within a living host cell (obligate parasitism )تطفل إبجااري. - Each type of a virus infects a limited range of host cells (host range )مدى اإلصااة Viruses are host specific ...
Coxsackievirus
... There is no vaccine to prevent coxsackie virus infection Hand washing is the best prevention,especially after toileting and before eating—can help reduce their spread ...
... There is no vaccine to prevent coxsackie virus infection Hand washing is the best prevention,especially after toileting and before eating—can help reduce their spread ...
Slide 1
... • Acquired from host cell during viral replication or release; envelope is portion of membrane system of host • Composed of phospholipid bilayer and proteins; some proteins are virally-coded glycoproteins (spikes) • Envelope’s proteins and glycoproteins often play role in host recognition ...
... • Acquired from host cell during viral replication or release; envelope is portion of membrane system of host • Composed of phospholipid bilayer and proteins; some proteins are virally-coded glycoproteins (spikes) • Envelope’s proteins and glycoproteins often play role in host recognition ...
Topic 10 Viruses
... to another – Candidates for the original sources of viral genomes include plasmids and transposons – Plasmids are small circular DNA molecules, found in bacteria and yeast, that replicate independently from the main chromosome(s) and can be transferred between cells – Transposons are DNA segments th ...
... to another – Candidates for the original sources of viral genomes include plasmids and transposons – Plasmids are small circular DNA molecules, found in bacteria and yeast, that replicate independently from the main chromosome(s) and can be transferred between cells – Transposons are DNA segments th ...
Viruses
... 3. Virus reprograms host to copy viral DNA and make viral proteins 4. New viruses assemble and mature 5. Cell lyses (bursts) and releases the new viruses to attack other cells 6. Results in death of the host cell ...
... 3. Virus reprograms host to copy viral DNA and make viral proteins 4. New viruses assemble and mature 5. Cell lyses (bursts) and releases the new viruses to attack other cells 6. Results in death of the host cell ...
Chapter 14: Viruses, Prions, and Viroids
... 8. What is a benefit of infection with a lysogenic phage? What change may occur with the bacterial cell? 9. Understand how filamentous phage (M13 and fd) replicate in host cells. What is unique to replication of a ssDNA molecule? 10. What are three mechanisms that reduce infection by phage? 11. Unde ...
... 8. What is a benefit of infection with a lysogenic phage? What change may occur with the bacterial cell? 9. Understand how filamentous phage (M13 and fd) replicate in host cells. What is unique to replication of a ssDNA molecule? 10. What are three mechanisms that reduce infection by phage? 11. Unde ...
MS Word Format
... People are generally familiar with viruses because they cause a number of disorders in living things. Because of this, people tend to think of viruses as alive. However, they are not. They are not composed of cells. They do not carry out the activities of life. They are simply a protein shell called ...
... People are generally familiar with viruses because they cause a number of disorders in living things. Because of this, people tend to think of viruses as alive. However, they are not. They are not composed of cells. They do not carry out the activities of life. They are simply a protein shell called ...
Viruses
... Glycoproteins on viral envelope bind to ____________ on immune cell then fusing with plasma membrane and releasing capsid proteins and RNA into the host cell ___________________ synthesizes DNA from viral RNA then subsequent DNA strands complementary to the first Double stranded viral DNA incorporat ...
... Glycoproteins on viral envelope bind to ____________ on immune cell then fusing with plasma membrane and releasing capsid proteins and RNA into the host cell ___________________ synthesizes DNA from viral RNA then subsequent DNA strands complementary to the first Double stranded viral DNA incorporat ...
What are Viruses?
... Contain RNA, not DNA Contain enzyme called Reverse Transcriptase When a retrovirus infects a cell, it injects its RNA and reverse transcriptase enzyme into the cytoplasm of that cell and it is able to make DNA ...
... Contain RNA, not DNA Contain enzyme called Reverse Transcriptase When a retrovirus infects a cell, it injects its RNA and reverse transcriptase enzyme into the cytoplasm of that cell and it is able to make DNA ...
Proteases and Viruses
... vi·rus (vrs) n. pl. vi·rus·es - Any of various simple submicroscopic parasites that often cause disease and that consist of a core of RNA or DNA surrounded by a protein coat. Unable to replicate without a host cell, viruses are typically not considered living organisms. Some of the better known viru ...
... vi·rus (vrs) n. pl. vi·rus·es - Any of various simple submicroscopic parasites that often cause disease and that consist of a core of RNA or DNA surrounded by a protein coat. Unable to replicate without a host cell, viruses are typically not considered living organisms. Some of the better known viru ...
Are Viruses Alive
... things may have one or more of the characteristics but not all of them. For a virus then to be classified as alive it must: ...
... things may have one or more of the characteristics but not all of them. For a virus then to be classified as alive it must: ...
Are Viruses Alive
... Getting a definite answer if viruses are alive or not may never happen. But hey, that's life...or is it? In the space below, give YOUR opinion. Write a response that expresses and defends your opinion on the topic of viruses as living or nonliving. ...
... Getting a definite answer if viruses are alive or not may never happen. But hey, that's life...or is it? In the space below, give YOUR opinion. Write a response that expresses and defends your opinion on the topic of viruses as living or nonliving. ...
Introduction to viruses
A virus is a biological agent that reproduces inside the cells of living hosts. When infected by a virus, a host cell is forced to produce many thousands of identical copies of the original virus, at an extraordinary rate. Unlike most living things, viruses do not have cells that divide; new viruses are assembled in the infected host cell. But unlike still simpler infectious agents, viruses contain genes, which gives them the ability to mutate and evolve. Over 5,000 species of viruses have been discovered.The origins of viruses are unclear: some may have evolved from plasmids—pieces of DNA that can move between cells—while others may have evolved from bacteria. A virus consists of two or three parts: genes, made from either DNA or RNA, long molecules that carry genetic information; a protein coat that protects the genes; and in some viruses, an envelope of fat that surrounds and protects them when they are not contained within a host cell. Viruses vary in shape from the simple helical and icosahedral to more complex structures. Viruses range in size from 20 to 300 nanometres; it would take 30,000 to 750,000 of them, side by side, to stretch to 1 centimetre (0.39 in).Viruses spread in many ways. Just as many viruses are very specific as to which host species or tissue they attack, each species of virus relies on a particular method for propagation. Plant viruses are often spread from plant to plant by insects and other organisms, known as vectors. Some viruses of animals, including humans, are spread by exposure to infected bodily fluids. Viruses such as influenza are spread through the air by droplets of moisture when people cough or sneeze. Viruses such as norovirus are transmitted by the faecal–oral route, which involves the contamination of hands, food and water. Rotavirus is often spread by direct contact with infected children. The human immunodeficiency virus, HIV, is transmitted by bodily fluids transferred during sex. Others, such as the Dengue virus, are spread by blood-sucking insects.Viral infections can cause disease in humans, animals and even plants. However, they are usually eliminated by the immune system, conferring lifetime immunity to the host for that virus. Antibiotics have no effect on viruses, but antiviral drugs have been developed to treat life-threatening infections. Vaccines that produce lifelong immunity can prevent some viral infections.