ANFS332 Lecture Notes - Lecture 11: Fomite, Serology, Antiviral Drug
4 Feb 2020
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Document Summary
Vaccination not usually recommended in usa (regional) Decrease viral replication and shedding from the respiratory and gi tracts. Negative inability to distinguish infected from -vaccinated birds by serological methods. Vaccination puts selective pressure on the virus to mutate. Most common: intraspecies, e. g. human to human, pig to pig, chicken to chicken. Occasional: interspecies and intraclass e. g. pig to human, wild mallard to domestic turkey. Rarely: interspecies and interclass e. g. bird to human, bird to pig. A pandemic occurs when an influenza virus which was not previously circulating among humans and to which most people don"t have immunity emerges and transmits among humans. These viruses may emerge, circulate and cause large outbreaks outside of the normal influenza season. As the majority of the population has no immunity to these viruses, the proportion of persons in a population getting infected may be quite large.
