Volume 76, Issue 3
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


Enteroinvasive (EIEC) causes dysentery; however, it is less widely reported than other etiological agents in studies of diarrhea worldwide. Between August 2003 and July 2005, stool samples were collected in case-control studies in 22 rural communities in northwestern Ecuador. Infection was assessed by PCR specific for and genes of enterotoxigenic (ETEC), the gene of enteropathogenic (EPEC), and the gene of both enteroinvasive and Shigellae. The pathogenic most frequently identified were EIEC (3.2 cases/100 persons) and Shigellae (1.5 cases/100 persons), followed by ETEC (1.3 cases/100 persons), and EPEC (0.9 case/100 persons). EIEC exhibited similar risk-factor relationships with other pathotypes analyzed but different age-specific infection rates. EIEC was the predominant diarrheagenic bacteria isolated in our community-based study, a unique observation compared with other regions of the world.


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  • Received : 10 Oct 2006
  • Accepted : 07 Nov 2006

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