(Dr. Yan) Which viruses are related with neoplastic disease of poultry?

Which is the clinical and epidemiological significance of non-cytopathic strains of bovine viral diarrhea virus?

(Alejandro Banda) The characteristics of the members of the Togaviridae family are:

(Alejandro Banda) Some small mammals such as lagomorphs (rabbits) may serve as reservoirs as part of a secondary cycle of

(Dr. Wang)  In canine distemper virus infected dogs, immunohistochemistry test will always be positive.

(Dr. Wang) Definition of herd immunity is

(Dr. Yan) Prion will lose the infectivity after they released into the environment. 

Susceptible cells have functional receptor for a given virus, may or may not support viral replication.

True or false:  stimulation of the immune response can make disease due to porcine circovirius-2 infection worse.

(Dr. Wang) Which of the following hosts can be infected by vesicular stomatitis virus?