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NADIS Knowledge Transfer - BVD in Cattle

Please select one or more answers from the list for each question. Many have multiple answers - these will only be marked as correct when all the right answers and none of the wrong answers, have been selected

Cattle that become persistently infected (PI) are infected during which of the following periods:

	During foetal development before day 110
	During foetal development after day 150
	During the first week of life
	During the first month of life
	During the first year of life

Major financial losses result where infection is introduced into which category of livestock listed below:

	A group of susceptible breeding cattle during early pregnancy
	A group of breeding cattle vaccinated against BVD
	A group of fattening cattle
	A group of susceptible cattle during late pregnancy (more than 5 months pregnant)
	A group of vaccinated stud bulls

What percentage of UK herds has had exposure to bovine virus diarrhoea virus (BVDV).:

	more than 2%
	more than 10%
	more than 20%
	more than 50%
	more than 90%

Which four of the following pose a risk of infection for BVD:

	Purchase of growing cattle of unknown disease status from a market
	Direct contact of cattle over a fence
	From hired bulls of unknown disease status
	From frozen semen
	Purchase of week-old calves from a market

Where purchase of breeding heifers is essential, which of the following should apply with respect to BVD control:

	Purchase cattle already pregnant
	Purchase cattle before mated, quarantine, blood sample then vaccinate against BVD
	Vaccinate during late pregnancy before introduction to main herd
	Mix with persistently infected PI animal to naturally vaccinate
	Mix with persistently infected bull

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