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Serovar, biotype, phage type, toxigenicity & antibiotic susceptibility patterns of Vibrio cholerae isolated during two consecutive cholera seasons (1989-90) in Calcutta.
Article in English | IMSEAR | ID: sea-22995
ABSTRACT
Characteristics of V. cholerae isolated from patients of acute secretory diarrhoea admitted to the Infectious Diseases Hospital, Calcutta during two consecutive cholera seasons (1989 and 1990), with special emphasis on biotyping and toxigenicity, were investigated. The isolation rates of V. cholerae during 1989 and 1990 were 78 and 85.1 per cent respectively, with Inaba serotype dominating in 1989 and Ogawa in 1990. All the V. cholerae 01 strains isolated in this study belonged to biotype Eltor with phage type 4 dominating (48.8%). Most of the strains of V. cholerae were resistant to 10 and 150 micrograms/ml of 0/129 vibriostatic agent. Similarly, majority of the V. cholerae strains were resistant to furazolidone (95.7%), cotrimoxazole (83%) and tetracycline (63.1%) and several resistance patterns were encountered. All the V. cholerae 01 strains examined produced cholera toxin (CT) in amounts ranging between greater than 70 pg/ml and greater than 2.5 ng/ml. In contrast, all but one of the non-01 strains isolated in this study did not produce CT. Further studies are required to elucidate the mechanism involved in the pathogenesis of non-01 V. cholerae mediated diarrhoea.
Subject(s)
Full text: Available Index: IMSEAR (South-East Asia) Main subject: Pteridines / Vibrio cholerae / Humans / Drug Resistance, Microbial / Microbial Sensitivity Tests / Cholera / Cholera Toxin / Bacterial Typing Techniques / India / Anti-Bacterial Agents Country/Region as subject: Asia Language: English Year: 1992 Type: Article

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Full text: Available Index: IMSEAR (South-East Asia) Main subject: Pteridines / Vibrio cholerae / Humans / Drug Resistance, Microbial / Microbial Sensitivity Tests / Cholera / Cholera Toxin / Bacterial Typing Techniques / India / Anti-Bacterial Agents Country/Region as subject: Asia Language: English Year: 1992 Type: Article