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Among 4 European bisons hunted in 1997 in the Bieszczady region, in one animal (male, 8 years old) pathological lesions in the retropharyngeal lymph nodes were found and Mycobacterium bovis strain was isolated. This is the second case of tuberculosis in the same herd. Some results of investigations on tuberculosis of farmed and free living bisons in Canada and USA were discussed.
Poland was declared free from bovine tuberculosis on 31 December 1975. During the national disease control from 1958 to 1975, 83 milion cattle were examined for tuberculosis. 3 614 376 (4.35%) cattle with positive reactions were slaughtered. Each year from 1980 to 1996 3 985 726 (1986) to 2 171 654 (1996) cattle were tested for tuberculosis - i. e. 31.51 to 30.37% of the total number of cattle in...
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