A severe outbreak of bovine tuberculosis in a 1300-head, multisite dairy herd in Great Britain had several unusual features, including anergy to the tuberculin skin test, milkborne disease in calves and a farm cat, and a risk of human infection. The outbreak was controlled by culling 221 cattle over 15 months, by using the γ-interferon (γ-ifn) test and by the examination of milk samples. The γ-ifn test detected infected animals that were not detected by the skin test.
- British Veterinary Association. All rights reserved.
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