Licence: Public Domain Mark
Credit: State control of tuberculosis. Source: Wellcome Collection.
Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.
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![and McFadyeaii coidd not infect rabbits and gninea pigs by feeding tbem witb milk winch was known to be tubercnlons. Pencil, for two months, fed two pigs with milk that, by injection, prodnced tnbercnlosis in rabbits, withont prodncing any effect npon the pigs. Gerlach also was sometimes snccessfnl and sometimes not. On the other hand, many feeding experiments have been snccessfnl. Ernst, nsing milk from tuber- cnlons animals with apparently healthy udders, pro- dnced tu])erculosis in two out of forty-eight calves fed with it. He also infected five out of twelve pigs; and, in another series of experiments, eight out of tAventy- one calves. Law reports three calves which had milk from sound udders, but became tuberculous. Pearson fed pigs with milk known to be tuberculous, and the animals apparently got fat upon it, Init wdien killed were found to Ije infected. He saj^s instances are not rare in which calves and swine fed with skim milk from a creamery, have developed tul^erculosis on farms that are otherwise free from this disease. The evidence, then, seems to ))e that milk of tuber- culous animals is quite likely to be infected, and that if infected it frequently produces tuberculosis in other animals, even of a different species, wliicli partake ui it. If milk can infect human lacings as it does calves and swine, it is certainly dangerous to use in a raw state the milk from tuberculous animals. While we have no incontrovertible evidence that bovine tul)er- culosis is thus transmitted to man, it is extremely probable that it is so. We certainly have very little evidence that it is not, and it would require prett}- strong evidence to show that a disease which can l)e carried over from cows to swine, rabbits, guinea](https://iiif.wellcomecollection.org/image/b21226209_0024.jp2/full/800%2C/0/default.jpg)
