webnotes_lec22_emergentdisease_112007

webnotes_lec22_emergentdisease_112007 - Vocabulary Emerging...

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Unformatted text preview: Vocabulary: Emerging Diseases • Emerging (emergent) disease • Agent of disease (pathogen) • Vector • Transmission • Prion • Virus • Bacterium • Protozoan • Antibiotic • Resistance • Vaccine/Immunization • Prokaryote • Eukaryote Disease Agents vs. Vectors • Disease suddenly appears in significant number of individuals in a population – New or thought to have been eradicated – Host switching – Mutation to more virulent form “Emerging” Disease Prion • Self-replicating protein • Invades nervous tissues – BSE (Bovine Spongiform Encephalopathy, aka mad cow) – CWD (Chronic Wasting Disease) – CJD (Creutzfeldt-Jakob Disease) Viral Structure (general) • Nucleic acid – DNA (ss or ds) or RNA as genetic material • Protein coat – sometimes membrane • Small! – 20-400 nm (1 nanometer = 10-9 meters) • Examples: – Adenovirus, Influenza, HIV, bacteriophages Viral Replication • Uses host cell organelles and materials to replicate Prokaryotes (bacteria)...
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webnotes_lec22_emergentdisease_112007 - Vocabulary Emerging...

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