An epidemic of typhoid fever involving 135 persons in a semi-closed community of. 742 persons is described. 2. There were nineteen symptomless excreters (14·1%). 3. Among the 116 clinical cases there were seven deaths, giving a case fatality of 6.03%. If the case fatality were calculated on the total persons involved (including symptomless excreters), the figure would be 5·2%. 4. The origin of the outbreak was not discovered, but there was strong cricumstantial evidence in favour of a milk-borne infection.
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Bradley et al. (1951) studied this question.
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