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Prevalence of Enterohaemorrhagic and Enteroaggregative E. coli among Children with Diarrhea in Najaf, Iraq.

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Diarrhea is one of the leading causes of morbidity and mortality among children under 5 years old in developing countries. The classification of diarrheagenic E. coli (DEC) strains among children… Click to show full abstract

Diarrhea is one of the leading causes of morbidity and mortality among children under 5 years old in developing countries. The classification of diarrheagenic E. coli (DEC) strains among children with diarrhea is still receiving low attention. The present study aimed at determining the prevalence of enterohaemorrhagic E. coli (EHEC) and enteroaggregative E. coli (EAEC) among children under 5 years old suffering from acute diarrhea. Stool samples (n=100) were collected from children under 5 years old suffering from acute diarrhea for the molecular detection of EHEC (using stx1 and stx2) and EAEC (using aat) by polymerase chain reaction technique. The results showed a high percentage of isolation of EHEC from stool samples, in compression to EAEC; accordingly, among 75 identified DEC isolates, 15.9% belonged to EHEC, while 5.3% belonged to EAEC. Among EHEC, stx1 was highly prevalent among isolates (9.3%), in comparison to stx2 (6.6%). A high frequency of EHEC was detected in males in the age group of 7-12 months, whereas EAEC was found in females in the age group of 13-19 months. In conclusion, EHEC and EAEC were associated with bloody and watery diarrhea among children under 5 years old. Genes associated with virulence factors (i.e., stx1, stx2, and aat) could be used as genetic markers for the detection of EHAE and EAEC.

Keywords: among children; children years; prevalence enterohaemorrhagic; children diarrhea; years old; coli

Journal Title: Archives of Razi Institute
Year Published: 2022

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