Within the past two years a number of articles have appeared beside that of to-day more or less exhaustively reviewing the evidence as to the frequency or possibility of human tuberculosis originating by contagion from cattle. Such evidence as we can obtain must necessarily be circumstantial. Even if it were permissible to make direct inoculation or infection experiments on the human being, a settlement of the question could only be obtained by a series of comparative tests on many individuals with tubercle bacilli of human and bovine origin respectively, and accompanied by all the safeguards to exact experimentation which have been found necessary in our similar tests made on cattle. We can therefore see the folly and the futility of those oversanguine experimenters who propose to decide the matter by one clumsily conducted inoculation test on a human victim. Truly, "Fools rush in where angels fear to tread."
DINWIDDIE RR. THE INTERTRANSMISSIBILITY OF HUMAN AND BOVINE TUBERCULOSISA REVIEW OF THE EXPERIMENTAL EVIDENCE.. JAMA. 1902;XXXIX(25):1574–1581. doi:10.1001/jama.1902.52480510014001c
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