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Journal of Clinical Microbiology, February 2000, p. 895-897, Vol. 38, No. 2
0095-1137/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Epidemic Typhoid in Vietnam: Molecular Typing of Multiple-Antibiotic-Resistant Salmonella enterica Serotype Typhi from Four Outbreaks

Phillippa Connerton,1 John Wain,2,3 Tran T. Hien,4 Tahir Ali,1 Christopher Parry,2,3 Nguyen T. Chinh,5 Ha Vinh,4 Vo A. Ho,6 To S. Diep,4 Nicholas P. J. Day,2 Nicholas J. White,2,3 Gordon Dougan,1 and Jeremy J. Farrar2,3,*

The Department of Biochemistry, Imperial College of Science, Technology and Medicine, London SW7 2AZ,1 and The Centre for Tropical Medicine, Nuffield Department of Clinical Medicine, Oxford University, John Radcliffe Hospital, Oxford,3 United Kingdom, and The Centre for Tropical Diseases4 and Wellcome Trust Clinical Research Unit,2 Cho Quan Hospital, and the University of Medicine and Pharmacy,5 Ho Chi Minh City, and Dong Thap Provincial Hospital, Cao Lanh, Dong Thap,6 Vietnam

Received 23 July 1999/Returned for modification 8 October 1999/Accepted 13 November 1999

Multidrug-resistant Salmonella enterica serotype Typhi isolates from four outbreaks of typhoid fever in southern Vietnam between 1993 and 1997 were compared. Pulsed-field gel electrophoresis, bacteriophage and plasmid typing, and antibiotic susceptibilities showed that independent outbreaks of multidrug-resistant typhoid fever in southern Vietnam are caused by single bacterial strains. However, different outbreaks do not derive from the clonal expansion of a single multidrug-resistant serotype Typhi strain.


* Corresponding author. Mailing address: Wellcome Trust Clinical Research Unit, The Center for Tropical Diseases, 190 Ben Ham Tu Quan 5, Ho Chi Minh City, Vietnam. Phone: 84 8 835 3954. Fax: 84 8 835 3904. E-mail: jeremyjf{at}hcm.vnn.vn.


Journal of Clinical Microbiology, February 2000, p. 895-897, Vol. 38, No. 2
0095-1137/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.



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