Abstract
Samples of fæces from the members of five families living in a Calcutta slum were examined repeatedly for over a year. In July, 1967, cholera vibrios were isolated from nine persons, at least one isolation being from each family. All vibrio-excretors were symptom-free, and no link could be established with any index case. Although cases of cholera were noted elsewhere during the period of the study, there was no overt disease in the five families, nor among their immediate neighbours. The fact that there was no cholera in the locality, despite the presence of carriers, may be explained by the availability of safe water and provision for effective disposal of fæces. The findings suggest that young children may play an important role as introducers of the infection.
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