Pathotypes of diarrheagenic Escherichia coli in children attending a tertiary care hospital in South India.

نویسندگان

  • Priya Rajendran
  • Sitara Swarna Rao Ajjampur
  • Divya Chidambaram
  • Gunasekaran Chandrabose
  • Bhuvaneswari Thangaraj
  • Rajiv Sarkar
  • Prasanna Samuel
  • Deva Prasanna Rajan
  • Gagandeep Kang
چکیده

The prevalence of diarrheagenic Escherichia coli (DEC) in children under 5 years was studied in children with diarrhea and controls in South India. Four polymerase chain reaction (PCR) "schemes" were used to detect genes of the 6 pathotypes of DEC. In 394 children with diarrhea, 203 (52%) DEC infections were found. Among the 198 controls, 126 (63%) DEC infections were found. Enteroaggregative E. coli was the most common pathotype by multiplex PCR both in cases (58, 14.7%) and controls (47, 23.7%), followed by enteropathogenic E. coli seen in 10% cases and 8% of controls. Enterotoxigenic E. coli (ETEC), enterohemorrhagic E. coli (EHEC), enteroinvasive E. coli (EIEC), and diffusely adherent E. coli (DAEC) were found in 4.1%, 2.0%, 1.0%, and 0.5% of cases, respectively. ETEC was found in 2.5% of controls, but EHEC, EIEC, and DAEC were not detected. Overall, no single assay worked well, but by discounting genes with a pathogenicity index of less than 1, it was possible to use the PCR assays to identify DEC in 75/394 (19%) cases and 12/198 (6.1%) controls, while mixed infection could be identified in 8/394 (2%) cases and 2/198 (1%) controls.

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عنوان ژورنال:
  • Diagnostic microbiology and infectious disease

دوره 68 2  شماره 

صفحات  -

تاریخ انتشار 2010