Excerpt from Aetiology of TuberculosisThat the bacillus of Koch is the cause of tubercular disease, that to these are due all the different lesions of the various tissues in which it is found implanted and that it is then invariably present, though, perhaps at times, difficult to discover, to color, or to isolate, and that, unless it is there, tuber culosis does not exist - all this is proved beyond question or doubt in Koch's Etiology. The mo...
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