The Causal Organism of Cholera

Choi^ra is almost universally attributed to the cholera vibrio, first discovered by Koch in 1883, and accepted, though not entirely without faint murmurs of questioning-, since. A doubt seems always to have existed as to the actual role played by t'he cholera vibrio, partly owing to the fact that a disease resembling cholera cannot be produced in experimental animals. Whilst to a certain extent this doubt persists, and is reflected in textbooks, in other respects the teaching of these textbooks is dogmatic enough. All refer to the enormous number of comma bacilli present in films made from t'he stools, and the " fish in a stream "