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Abstract
Extract
This report describes a case of infection in a dog with the human strain of Mycobacterium tuberculosis. There is a previous report of canine tuberculosis in this country (Dodd, Citation1952), but in this case the infection was cause by the bovine strain. It appears that the incidence of tuberculosis in most populations of clogs is less than 5 per cent. (Francis, Citation1958; Innes, Citation1953; Stamp, Citation1959) although two authorities quoted by Francis give it as high as 13.5 per cent. Any figures must, however, be influenced by the method and extent of the sampling and by the environment in which the dogs live. About two-thirds of cases arise from infection with the human strain of the bacillus and one third from the bovine. Riser and Karlson Citation(1956) refer to experimental work by Feldman and Hull which suggests the dog is equally susceptible to both human and bovine strains, but very resistant to infection with the avian strain. However, as dogs live in closer association with man than with cattle, there is greater opportunity for infection by the human strain.