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Shifting prevalence of major diarrheal pathogens in patients seeking hospital care during floods in 1998, 2004, and 2007 in Dhaka, Bangladesh.

Journal article
Authors Aaron M Harris
Fahima Chowdhury
Yasmin Ara Begum
Ashraful Islam Khan
Abu S G Faruque
Jason B Harris
Edward T Ryan
Alejandro Cravioto
Stephen B Calderwood
Firdausi Qadri
Ann-Mari Svennerholm
Published in The American journal of tropical medicine and hygiene
Volume 79
Issue 5
Pages 708-14
ISSN 1476-1645
Publication year 2008
Published at Institute of Biomedicine, Department of Microbiology and Immunology
Pages 708-14
Language en
Keywords Adolescent, Bangladesh, epidemiology, Child, Child, Preschool, Diarrhea, epidemiology, microbiology, virology, Enzyme-Linked Immunosorbent Assay, Escherichia coli, isolation & purification, Female, Floods, Hospitals, Humans, Infant, Male, Patient Acceptance of Health Care, Prevalence, Rotavirus, isolation & purification, Vibrio cholerae, isolation & purification
Subject categories Microbiology in the medical area


Bangladesh experienced severe flooding and diarrheal epidemics in 2007. We compared flood data from 2007 with 2004 and 1998 for diarrheal patients attending the ICDDR,B hospital in Dhaka. In 2007, Vibrio cholerae O1 (33%), rotavirus (12%), and enterotoxigenic Escherichia coli (ETEC) (12%) were most prevalent. More severe dehydration was seen in 2007 compared with 2004 and 1998 (P < 0.001). In 2007, V. cholerae O1 Inaba (52%) and Ogawa (48%) were seen, whereas in 2004 and 1998 it was primarily Inaba and the Ogawa types, respectively (P < 0.001). In 2007, 51% of ETEC produced the heat labile toxin (LT) (P < 0.001 compared with 2004), 22% expressed the heat stable (ST) (P < 0.001), and 27% were ST/LT positive (P = 0.231). The CS7 colonization factor (CF) was the most prevalent in 2007 (20% compared with 6% in 2004; P = 0.05). Our findings demonstrate alterations in clinical features and phenotypic changes of major bacterial pathogens in the recent Bangladesh flood.

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