ANFS332 Lecture Notes - Lecture 2: African Swine Fever Virus, Viral Hemorrhagic Fever, Epizootic
22 Sep 2019
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Document Summary
An epizootic is a disease that appears as new cases in a given animal population, during a given period, at a higher than expected rate. An epidemic is the same term applied to human populations. High population density is a major contributing factor to epizootics. Common diseases that occur at a constant but relatively high rate in the population are said to be enzootic. African swine fever - epizootic disease, now really a panzootic disease - Clinical signs of the disease - hemorrhagic fever. 150-200 million hogs and pigs have been infected. China has up to 440 million head. The virus is very hardy and resistant to physical and chemical inactivation. It can remain viable for extended periods of time in blood, feces and tissues. Its most common acute form presents itself as a hemorrhagic fever. Subacute and chronic forms of the disease also exists. Control of asf is dependent on a stamping out policy and strict quarantine enforcement.
