Porcine & Misc. Viruses (Exam 2)

Question 1

3 major coronaviruses cause GI disease on pigs. Two are alphacoronaviruses, ___________ & ___________. One is a deltacoronavirus, _________.

Answer 1

transmissible gastroenteritis virus
porcine epidemic diarrhea virus
porcine deltacoronavirus

Question 2

Transmissible Gastroenteritis Virus transmission is promoted in (cold/warm/hot) temperatures.

Answer 2

cold

Question 3

What are the two forms of Transmissible Gastroenteritis Virus in pigs? Which effects swine of all ages and causes severe disease?

Answer 3

epidemic form (all ages + severe)
endemic form (mild)

Question 4

Porcine Epidemic Diarrhea Virus & Porcine Deltacoronavirus are fatal in:

Answer 4

suckling pigs

Question 5

(T/F) Porcine Epidemic Diarrhea Virus & Porcine Deltacoronavirus destroy crypt epithelium and cause diarrhea by villous atrophy.

Answer 5

False (NO crypt destruction)

Question 6

Infectious Bursal Disease Virus destroys the cloacal bursa of chickens and therefore what cell type?

Answer 6

B lymphocytes

Question 7

Infectious Bursal Disease Virus is a(n) (enveloped/nonenveloped) (ss/ds) (DNA/RNA) virus.

Answer 7

nonenveloped dsRNA virus

Question 8

How is Infectious Bursal Disease Virus spread?

Answer 8

fecal-oral
fomites

Question 9

Chicks <3 weeks of age infected with Infectious Bursal Disease Virus have permanent ___________.

Answer 9

immune deficiency (B cells)

Question 10

What important non-enveloped, RNA calicivirus infects rabbits?

Answer 10

Rabbit Hemorrhagic Disease Virus

Question 11

How is Rabbit Hemorrhagic Disease Virus transmitted?

Answer 11

direct contact (body fluids)
fomites

Question 12

What is the primary lesion seen in Rabbit Hemorrhagic Disease Virus?

Answer 12

hepatic necrosis