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Either the bovine or the human type of tubercle bacillus may give rise to disease in any part of the human body, and the type of infection can be determined only by careful bacteriologic examinations. In England and Wales, 98 to 99 per cent of all cases of pulmonary tuberculosis and 70 per cent of all cases of nonpulmonary tuberculosis are due to the human type of tubercle bacillus, and at all ages about 6 per cent of the deaths are due to the bovine type. In Scotland, however, the incidence of the bovine type of tuberculosis in man is higher than in England and Wales. Indeed, about 5 per cent of the cases of pulmonary tuberculosis are caused by the bovine type of tubercle bacillus. Because of the prevalence of both human and bovine tubercle bacilli in Great Britain, most persons come in contact with these organisms before they
Report of the Committee on Tuberculosis in War-Time. JAMA. 1943;121(3):221–222. doi:10.1001/jama.1943.02840030059030
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