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J Med Microbiol 46 (1997), 611-616; DOI: 10.1099/00222615-46-7-611
© 1997 Society for General Microbiology
ISSN 0022-2615
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Molecular epidemiology of Vibrio cholerae O1 isolates from Colombia

M. TAMAYO, S. KOBLAVI*, F. GRIMONT*, E. CASTAÑEDA and P. A. D. GRIMONT*

Instituto Nacional de Salud, Avenida Eldorado carrera 50 Zona 6, Santafé de Bogota, Colombia

*Unité des Entérobacteries, Unité INSERM 389, Institut Pasteur, 28 rue du Dr Roux, 75724 Paris Cedex 15, France

Corresponding author: Dr P. A. D. Grimont.

Received March 15, 1996 Revision received November 25, 1996.
Accepted November 25, 1996

A total of 173 Vibrio cholerae O1 isolates from the recent cholera epidemic in Colombia was analysed by the polymerase chain reaction (PCR) for the genes encoding the A subunit of cholera toxin (ctx A) and the zonula occludens toxin (zot), and by ribotyping. All isolates were positive for ctx A and zot, which was confirmed by hybridisation. Ribotyping with restriction endonuclease Bg/I digestion of total DNA revealed three ribotypes: B5a comprising 165 (96.4%) isolates, and two new designated ribotypes B20 and B21a in six (3.5%) isolates and two (1.1%) isolates, respectively. These findings have significant public health implications.




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