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Description
Flashcards by gina_evans0312, updated more than 1 year ago
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Created by gina_evans0312
about 10 years ago
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| Question | Answer |
| Zoonoses | Where an animal infecting virus becomes capable of infecting humans |
| Usual Animal Sources of Viruses | Birds (poultry), or pigs |
| Antigenic Shift | Where two or more different viral strains (or different viruses completely) combine |
| Antigenic Shift- New Virus | New viral subtype with genetic material and surface antigens which are a mix of the two parents |
| Antigenic Shift- New Viral Infectiousness | Varies greatly- can increase, decrease, or no change |
| Antigenic Drift | Alteration of the genome during replication |
| Antigenic Drift- Cause | Immunity leads to selection pressure |
| Antigenic Drift- RNA Polymerases | Have no proof reading and are very error prone, so RNA viruses undergo antigenic drift very often |
| Antigenic Drift- New Strains | Causes new strains of the same virus to develope (i.e. In Influenza each year) |
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