Abstract
11,650 specimens were studied bacteriologically. 139 El Tor Inaba strains were isolated from the stool of suspected patients and contacts, from water of various wells and tributaries of Kelantan river, and from shellfish. 15 El Tor Inaba, 25 non-agglutinable and 10 partially-agglutinable and auto-agglutinable (rough) strains were demonstrated in edible types of shellfish. 55 non-agglutinable vibrios were isolated from stools of suspected patients, from shellfish and water, and were regarded as pathogenic. Shellfish and water were considered as predominant vehicles for the transmission of cholera in this outbreak. The short-term carrier state is emphasized and the causal relationship of cholera with carrier was found to be insignificant in this outbreak. Bacteriological significance of partially-agglutinable and auto-agglutinable (rough) El Tor vibrios is discussed.
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