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Brucellosis in dairy herds—some applications of the milk ring test

Published online by Cambridge University Press:  15 May 2009

G. S. Ferguson
Affiliation:
Department of Veterinary Hygiene and Preventive Medicine, Royal (Dick) School of Veterinary Studies, Edinburgh
A. Robertson
Affiliation:
Department of Veterinary Hygiene and Preventive Medicine, Royal (Dick) School of Veterinary Studies, Edinburgh
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1. It has been shown that cows infected with brucellosis of the udder can usually be detected by an application of a modified milk ring test, based on the finding that milks from infected cows, in addition to showing a high bulk MRT titre also show considerable quarter variations. The effects of adult vaccination with strain 19 vaccine on the MRT are reported; low bulk titres with uniformity between quarters, except at the beginning and end of lactation and immediately following vaccinations, were observed, thus making differentiation between vaccinated and infected cows possible.

2. In a survey of raw milk samples from three areas in southern Scotland, 3·5, 5·3 and 9·0% of samples were shown to be infected with Br. abortus.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1960

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