J Med Microbiol 56 (2007), 380-385; DOI: 10.1099/jmm.0.46916-0
© 2007 Society for General Microbiology
ISSN 1473-5644
Shiga toxin-producing Escherichia coli isolated from patients with diarrhoea in Bangladesh
M. Aminul Islam1,2,4,
A. E. Heuvelink2,
E. de Boer2,
P. D. Sturm3,
R. R. Beumer4,
M. H. Zwietering4,
A. S. G. Faruque1,
R. Haque1,
D. A. Sack1 and
K. A. Talukder1
1 International Centre for Diarrhoeal Disease Research, Bangladesh: Centre for Health and Population Research, GPO Box-128, Dhaka-1000, Bangladesh
2 Food and Consumer Product Safety Authority, Zutphen, The Netherlands
3 Department of Medical Microbiology, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
4 Laboratory of Food Microbiology, Wageningen University, The Netherlands
Correspondence
K. A. Talukder
kaisar{at}icddrb.org
Received 25 August 2006
Accepted 14 November 2006
The prevalence of Shiga toxin-producing Escherichia coli (STEC) and its characteristics were determined among hospitalized patients with diarrhoea and children with diarrhoea in an urban slum community of Dhaka city using sensitive culture and PCR methods. Stool samples were collected from 410 patients with diarrhoea enrolled in the 2 % surveillance system (every 50th patient attending the hospital with diarrhoeal disease is included) at the ICDDR,B hospital and from 160 children of 25 years of age with diarrhoea living in an urban slum in Dhaka, between September 2004 and April 2005. Shiga toxin genes (stx) were detected by multiplex PCR in the enrichment broth of nine samples (2.2 %) from hospitalized patients and 11 samples (6.9 %) from the community patients. STEC was isolated from five stool samples with positive PCR results using a colony patch technique. All five isolates were positive in the Vero cell assay and PCR fragments of stx genes were confirmed by sequencing. Two isolates were positive for the E. coli attaching-and-effacing (eae) gene and four were positive for the enterohaemolysin (hlyEHEC) gene and enterohaemolysin production. The five isolates belonged to five different serotypes: O32 : H25, O2 : H45, O76 : H19, ONT : H25 and ONT : H19. It can be concluded that STEC is not a common pathogen in Bangladesh among hospitalized patients with diarrhoea nor among mild cases of diarrhoea in the community.
Abbreviations: STEC, Shiga toxin-producing Escherichia coli.
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M. A. Islam, A. S. Mondol, E. de Boer, R. R. Beumer, M. H. Zwietering, K. A. Talukder, and A. E. Heuvelink
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5414 - 5421.
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