NADIS Knowledge Transfer - Abortion in Cattle

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Abortions caused by Listeria monocytogenes :

	are seen sporadically during winter months when feeding very poor quality silage (high pH)
	are associated with silage eye (bovine iritis)
	occur when cattle co-graze with sheep
	result from cattle drinking from contaminated waterways
	follow introduction of carrier cattle

In cattle Salmonella Dublin infection can cause:

	early abortion and return to oestrus
	repeated returns to oestrus
	an outbreak of abortions during the winter months
	an outbreak of abortions during the summer months
	birth of a small live calf at full-term

What is the most commonly diagnosed cause of bovine abortion in the UK:

	Neospora caninum
	Mycotic (fungal) abortion
	Listeria monocytogenes
	Frequent coughing and weight loss two to three weeks after housBrucella abortusing
	S. typhimurium

Which three of the following control measures applies to Neospora caninum abortion:

	keeping dogs away from calving areas and products of calving, abortion
	don't feed dogs raw meat
	careful disposal of products of abortion/stillbirth
	vaccination
	strict biosecurity

Control of bovine virus diarrhoea (BVD/MD) can be best achieved by which two of the following:

	maintenance of a disease-free herd and strict biosecurityl
	completion of the recommended vaccination programme before heifers and bulls enter the breeding programme
	Mixing bulling heifers with dry cows
	buying replacement heifers from multiple sources
	use of artificial insemination only in breeding programmes

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