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June 15, 1895

Answer to Dr. Rogers.

JAMA. 1895;XXIV(24):946. doi:10.1001/jama.1895.02430240036011

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New York, June 10, 1895.

To the Editor:  —Dr. Rogers' attack upon Koch's demonstration of the causation of cholera, in the Journal of June 8, is rather amusing to the medical man of to-day. While believing that he will receive answers more able than mine, I take the liberty of calling his attention to a few errors in his statement.In the first place, Koch did not "fancy" that the comma bacillus was the cause of cholera; it had to be present in every [case of cholera, it had to be capable of cultivation in artificial media in pure culture, and it had to produce the disease whenever inoculated, before he was willing to identify it as the cause. Unfortunately, the inoculation experiments do not depend alone upon results obtained in the lower animals, for several bacteriologists have themselves been infected while working with this organism.In the second place,

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