Bovine Respiratory Syncytial Virus

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AC/1536/16

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Name and Surname *

SAVC Registration Number *

1. BRSV is a *

1 point

Rhabdovirus

Poxvirus

Orbivirus

Pneumovirus

Lentivirus

2. The known natural host for BRSV is *

1 point

Camelids

Cattle

Pigs

Horses

Buffalo

3. BRSV initially infects the *

1 point

Vaginal epithelium

Nasal epithelium

Tracheal epithelium

Bronchial epithelium

b, c and d

4. Clinical signs may be characterized by the presence of *

1 point

Lameness, swollen joints

Abortions

Vaginal discharges

Rumen stasis

Dyspnoea

5. Post inoculation it was found that the median time to seroconversion was *

1 point

Day 9 (range 5 - 21 days)

Day 3 (range 1 - 7 days)

Day 20 (range 15 - 30 days)

Day 21 (range 16 - 28 days)

Day 25 (range 20 - 35 days)

6. The following cells may typically be seen in histological sections of affected lung *

1 point

Neutrophils

Syncytial cells

Lymphocytes

Eosinophils

Basophils

7. A diagnosis could most easily be confirmed by means of *

1 point

Histology

Serology

Culture

IHC staining of formalin fixed sections.

FAT

8. The presence of NS proteins *

1 point

Are not mediated by genes

Mediate resistance of BRSV to IFN stimulated response

Stimulate phosphorylation

Supresses activation of IRF3

Release complement

9. Secondary bacterial infections are commonly seen which would include *

1 point

M. haemolytica

P. multocida

H. somnus

Nore of the above

All of the above.

10. Which of the following above will not be an important differential *

1 point

Parainfluenza type 3

Rabies

Bovine adenovirus

IBR

Atypical interstitial pneumonia

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