Virus - cases and 4.7 million deaths per year Smallpox,...

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Click to edit Master subtitle style Viruses Life(?) in Subminiature
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The Viruses Very small, even by bacterial standards – 18-350 nm Non-living parasites Use host cells for reproduction Have genetic material of DNA or RNA Classified based on genetic mechanism and host range (Check table 21.7) One recent web site revealed over 70 families without much monophyly Can reproduce with appalling rapidity
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Herpes virus
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Viral Induced Coloration in Tulip
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HIV an Encapsulated Virus
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T-even type Bacteriophage
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Alternate Life Cycles In Viral Infection
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Encapsulate d Virus “Life” Cycle
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Some Major Viral Diseases AIDS – HIV – 5.6 million new cases and 2.6 million deaths annually Measles – 200 million cases and 1 million deaths per year Hepatitis – 200 million cases and 1 million deaths per year Respiratory infections (some bacterial) – 1 billion
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Unformatted text preview: cases and 4.7 million deaths per year Smallpox, anthrax and polio not even listed!!!! What about antibiotics? Chemical that interferes with some aspect of bacterial (usually) life cycle Rather specific to target organism Useless against other sorts of organisms Often derived from chemicals produced as part of natures ongoing germ warfare If not 100% effective, bacteria rapidly develop immunity (= they evolve) What about immunization? You produce antibodies to specific antigens of pathogen Antibodies very specific to target organism Useless against other sorts of organisms, including other types of viruses Diversity of viruses make immunization less than efficient Viruses can reproduce very rapidly and escape immunity (= they evolve)...
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This note was uploaded on 04/06/2008 for the course BIO 1102 taught by Professor Kendramaxwell during the Spring '08 term at Appalachian State.

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Virus - cases and 4.7 million deaths per year Smallpox,...

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