Sheep Associated Bovine Malignant Catarrhal Fever

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AC/1539/16

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1. Which of the following viruses do not cause clinical MCF *

1 point

OvHV-2

A1HV-1

A1HV-2

Gemsbok MCFV

CpHV-2

2. Which of the following is the least susceptible to MCFV infection *

1 point

Banteng

White tail dear

Pe're David's deer

Water buffalo

Bos taurus

3. In one survey OvHV-2 infection in sheep in SA has shown a prevalence of *

1 point

77 % in 86 sheep

86 % in 77 sheep

80 % in 70 sheep

70 % in 80 sheep

50 % in 76 sheep

4. Under natural conditions sheep *

1 point

Are born infected

Become infected at 2 months of age

Never become infected

Only become infected after 2 years

Only remains infected for 6-9 month

5. Following on aerosol route of infection by OvHV-2 *

1 point

Lambs may develop subclinical bronchointerstitial pneumonia

Wildebeest calves develop subclinical bronchointerstitial pneumonia

The upper respiratory tract escapes infection.

The brain is the target organ infected.

The intestinal tract is the target organ system infected

6. Following on infection with OvHV-2 domestic pigs *

1 point

May develop very severe lesions of pneumonia

Never develops MCF like clinical signs.

Develop MCF like clinical signs (head and eye form)

Become clinically affected in very large numbers

Become clinically affected despite the absence of close contact with sheep.

7. Following on exposure to OvHV-2 domestic goats *

1 point

Never becomes affected

Always becomes clinically affected

Always develops lesions of arteritis in all animals

Show an abortion storm

May develop MCF like disease.

8. On the African the most economically and clinically important form of Malignant Catarrhal fever is associated with *

1 point

SA-MCF

Gemsbok MCF

WA-MCF

Muskox- MCF

None of the above

9. Transmission of sheep associated Malignant Catarrhal fever to cattle is mostly through *

1 point

direct physical contact with a carrier animal

Ingestion of foetal membranes

Through drinking water

Artificial insemination

None of the above

10. Control measures for SA-MCF in South Africa include *

1 point

Vaccination of susceptible species

Vaccination of carrier animals

Slaughter out of infected flocks

Prevention of co-grazing of carriers and susceptible animals

All of the above

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