title: An epidemiological approach to the study of the role of carriers and natural water sources in the maintenance of cholera infection in an endemic area in Calcutta.
mesh_terms: D000293:Adolescent; D000328:Adult; D002353:Carrier State; D002648:Child; D002675:Child, Preschool; D002771:Cholera / Q000635:transmission*; D005260:Female; D006801:Humans; D007194:India; D007223:Infant; D008297:Male; D008875:Middle Aged; D014734:Vibrio cholerae / Q000302:isolation & purification*; D014871:Water Microbiology; D014881:Water Supply