virology exam 2

Question 1

virus that causes abortion in every species except sheep

Answer 1

herpes

Question 2

three major virus that cause abortion in cattle

Answer 2

BVD, BHV, bluetongue

Question 3

in herpes when does abortion most commonly occur

Answer 3

4 months gestation to full term, tends to cluster

Question 4

multifocal hepatic necrosis

Answer 4

herpes

Question 5

what bovine virus typically causes low abortion rates and more commonly infertility

Answer 5

BVD

Question 6

where does BVD replicate

Answer 6

mucosa and palatine tonsils

Question 7

BVD lesions

Answer 7

cerebellar hypoplasia
hairless
osteopetrosis

Question 8

what looks like BVD but is transmitted by culicoides

Answer 8

schmallenberg virus

Question 9

healthy mare with late term abortions still births and neonatal deaths

Answer 9

EHV1

Question 10

what is the main difference between EHV and EVA

Answer 10

EVA causes systemic illness in the mares while EHV1 can be asymptomatic

Question 11

what cells do eva infect

Answer 11

macrophages

Question 12

what is BVD in small ruminants

Answer 12

border disease

Question 13

which small ruminant virus in not contagious

Answer 13

bluetongue. transmitted by arthropods

Question 14

most cases of abortions from this virus have been from vax with the modified live vax

Answer 14

bluetongue

Question 15

which virus can cause hydrocephalus and hydrancephaly

Answer 15

cache valley virus

Question 16

what is important about PRRSV

Answer 16

highest mutation rate so no vax

Question 17

when do abortions occur with PRRSV

Answer 17

at the end of pregnancy

Question 18

an important cause of reproductive failure worldwide in porcine

Answer 18

parvovirus

Question 19

seen in wild pigs and eradicated from domestic pigs

Answer 19

Porcine herpes virus

Question 20

dog virus that actually causes viremia in the fetus

Answer 20

CHV: mostly infected after birth