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Cholera, tuberculosis, diphtheria and typhoid bacilli were subsequently identified.

The toxine of the typhoid bacillus often affects the heart, and causes what is called cloudy swelling of its muscular fibres.

Changes somewhat analogous to those found in the human aorta as the result of intimal proliferations, are produced in animals by the toxins of the typhoid bacillus and the Streptococcus pyogenes.

The reservoirs, filters, and distribution system, owing to flood conditions, became infected with typhoid bacilli which caused a severe epidemic amongst the consumers.

The typhoid bacillus does not attack any of the domestic animals; consequently all food-borne typhoid is caused more or less directly by human contamination.