virology exam 2 Flashcards

1
Q

virus that causes abortion in every species except sheep

A

herpes

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2
Q

three major virus that cause abortion in cattle

A

BVD, BHV, bluetongue

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3
Q

in herpes when does abortion most commonly occur

A

4 months gestation to full term, tends to cluster

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4
Q

multifocal hepatic necrosis

A

herpes

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5
Q

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

A

BVD

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6
Q

where does BVD replicate

A

mucosa and palatine tonsils

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7
Q

BVD lesions

A

cerebellar hypoplasia
hairless
osteopetrosis

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8
Q

what looks like BVD but is transmitted by culicoides

A

schmallenberg virus

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9
Q

healthy mare with late term abortions still births and neonatal deaths

A

EHV1

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10
Q

what is the main difference between EHV and EVA

A

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

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11
Q

what cells do eva infect

A

macrophages

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12
Q

what is BVD in small ruminants

A

border disease

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13
Q

which small ruminant virus in not contagious

A

bluetongue. transmitted by arthropods

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14
Q

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

A

bluetongue

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15
Q

which virus can cause hydrocephalus and hydrancephaly

A

cache valley virus

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16
Q

what is important about PRRSV

A

highest mutation rate so no vax

17
Q

when do abortions occur with PRRSV

A

at the end of pregnancy

18
Q

an important cause of reproductive failure worldwide in porcine

A

parvovirus

19
Q

seen in wild pigs and eradicated from domestic pigs

A

Porcine herpes virus

20
Q

dog virus that actually causes viremia in the fetus

A

CHV: mostly infected after birth

21
Q
A