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Infection of psittacine birds by beak and feather disease virus (BFDV) is most likely to cause:

(Alejandro Banda) This virus induces a zoonosis transmitted by the wood tick (Dermacentor andersoni), and it is maintained in an epizootic cycle that includes different stages of ticks and small rodents.

African Swine Fever virus can be transmitted by

Which is the most common clinical feature of foot and mouth disease in pigs

(Alejandro Banda) Which are the clinical features of the disease in horses induced by equine alphaviruses?

There is not a vaccine available for African Swine Fever Virus.

Which best describes the structure of a parvovirus?

(Dr. Yan) For the cow with 30 month of age or older, specified risk materials like skull, brain, eyes and spinal cord are prohibited in the human food supply. 

(Dr. Yan) Select the best answer for the characteristic of retrovirus? (2 points) 

(Dr. Yan) The key difference between positive and negative sense RNA: Positive RNA can be translated directly into protein by host machinery whereas negative needs to be converted to positive sense first.