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Journal of Clinical Microbiology, September 2006, p. 3401-3404, Vol. 44, No. 9
0095-1137/06/$08.00+0     doi:10.1128/JCM.00611-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

Clonal Relationship among Vibrio cholerae O1 El Tor Strains Causing the Largest Cholera Epidemic in Kenya in the Late 1990s

M. Scrascia,1 F. Maimone,1,2 K. A. Mohamud,2 S. F. Materu,3 F. Grimont,4 P. A. D. Grimont,4 and C. Pazzani1*

Dipartimento di Genetica e Microbiologia, Università di Bari, Via G. Amendola 165/A, 70126 Bari, Italy,1 Interuniversity Research Center for Sustainable Development, Università "La Sapienza," Palazzo Doria Pamphilj, 00038 Valmontone, Roma, Italy,2 African Medical and Research Foundation (AMREF), P.O. Box 30125, Nairobi, Kenya,3 Unité de Biodiversité des Bactéries Pathogènes Emergentes, Institut Pasteur, 75724 Paris Cedex 15, France4

Received 22 March 2006/ Returned for modification 9 May 2006/ Accepted 17 July 2006

Eighty Vibrio cholerae O1 strains selected to represent the 1998-to-1999 history of the largest cholera epidemic in Kenya were characterized by ribotyping, antimicrobial susceptibility, and random amplified polymorphic DNA patterns. Except for 19 strains from 4 local outbreaks in North Eastern Province along the Somalia border, the other 61 strains from 25 outbreaks occurring in districts scattered around the country were all ribotype B27 and resistant to chloramphenicol, spectinomycin, streptomycin, sulfamethoxazole, and trimethoprim. The 61 strains showed similar and specific amplified DNA patterns. These findings indicate that the predominant strains that caused the Kenyan epidemic had a clonal origin and suggest that ribotype B27 strains, which first appeared in West Africa in 1994, have had a rapid spread to eastern Africa.

* Corresponding author. Mailing address: Dipartimento di Genetica e Microbiologia, Università di Bari, Via G. Amendola 165/A, 70126 Bari, Italy. Phone: 39 0805443379. Fax: 39 0805443386. E-mail: pazzani{at}biologia.uniba.it.

Journal of Clinical Microbiology, September 2006, p. 3401-3404, Vol. 44, No. 9
0095-1137/06/$08.00+0     doi:10.1128/JCM.00611-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.



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