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Virology > Small Ruminant Viruses > Flashcards

Small Ruminant Viruses Flashcards

1
Q

viral family of Bluetongue

A
  • reoviridae
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2
Q

how is bluetongue transmitted

A
  • by midge

- arbovirus

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3
Q

3 main clinical signs of bluetongue

A
  • hyperemia
  • cyanotic tongue
  • edema in head and neck
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4
Q

T/F: once infected with bluetongue you are infected for live

A
  • false; eventually clears disease
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5
Q

bluetongue can look similar to what virus

A
  • IBR (herpesvirus 1)
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6
Q

use what to diagnose bluetongue

A
  • buffy coat
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7
Q

reservoir of bluetongue

A
  • subclinical infected cattle
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8
Q

virus family of caprine arthritis-encephalitis

A
  • retroviridae
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9
Q

2 syndromes of caprine arthritis-encephalitis

A
  • kids - encephalomyelitis

- older than 1 year - arthritis

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10
Q

virus that has immune cells attacking nerve cells

A
  • caprine arthritis-encephalitis
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11
Q

mastitis and interstitial pneumonia are common clinical signs of this virus

A
  • caprine arthritis-encephalitis
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12
Q

at necropsy lesions in CNS constitute focal malacia in white matter in this virus

A
  • caprine arthritis-encephalitis
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13
Q

diagnosis of caprine arthritis-encephalitis

A
  • antibody detection - serological
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14
Q

how does vertical transmission occur for caprine arthritis-encephalitis and how can it be prevented

A
  • transmitted through colostrum and milk

- prevented by healing up colostrum (56c for 1hr)

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15
Q

virus family of scrapie

A
  • none; is a prion!
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16
Q

breeds that are mores susceptible to scrapie

A
  • suffolk and hampshire

- genetic component

17
Q

development of pruritus is a hallmark for this disease

A
  • scrapie
18
Q

spongiform presentation of the brain is seen in this disease

A
  • scrapie
19
Q

T/F: scrapie is not zoonotic

A
  • false - animals need to be eliminated
20
Q

T/F: there is inflammation and an immune response associated with scrapie (pruritus is a hallmark)

A
  • false no inflammation or immune response
21
Q

diagnosis of scrapie

A
  • history and clinical signs
22
Q

virus family of Maedi

A
  • retroviridae
23
Q

clinical sings of Maedi and when are they seen

A
  • progressive pneumonia

- seen when flock is driven

24
Q

virus in which lungs appear homogenously consolidated and do not collapse

A
  • maedi
25
Q

immunopathology role in maedi

A
  • immunosuppression delays progress and degenerative changes
26
Q

diagnosis of maedi

A
  • antibody ELISA
27
Q

viral family of ovine pulmonary adenomatosis (OPA)

A
  • retroviridae
28
Q

both maedi and OPA are in the retroviridae family - what is different between them

A
  • OPA can cause tumors
29
Q

virus that has large amounts of surfactant containing viscous fluid produced by tumor cells

A
  • OPA
30
Q

diagnosis of OPA

A
  • histopathology post mortem
31
Q

how is OPA and maedi shed

A
  • through secretions
32
Q

viral family of Orf

A
  • poxviridae
33
Q

this virus is also known as contagious ecthyma

A
  • Orf
34
Q

T/F: orf is zoonotic

A
  • true, when in close contact - basic hygiene will disinfect
35
Q

location of lesions of Orf

A
  • muzzle and lips

- rarely on eyelids, feet and teats

36
Q

progression of Orf lesion

A
  • papules -> pustules -> thick crusts
37
Q

diagnosis of Orf

A
  • clinical diagnosis
38
Q

T/F: Orf is easy to eradicate from a flock

A
  • false
39
Q

when should animals be vaccinated for Orf

A
  • ewes should be vaccinated weeks before lambing

- applied by scarified skin (axilla) where localized lesion develops -> generating short-lived immunity

Virology (8 decks)

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