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Abstract
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Article Information:
Identification of Different Categories of Diarrheagenic Escherichia coli in Stool Samples by Using Multiplex PCR Technique
Sehand K. Arif and layla I.F. Salih
Corresponding Author: Sehand K. Arif
Submitted: 2010 August, 23
Accepted: 2010 September, 22
Published: 2010 November, 10 |
Abstract:
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Diarrheal diseases continue to be one of the most common causes of morbidity and mortality among
young children in developing countries. The objective of this study was to evaluate the multiplex PCR as a
rapid diagnostic tool for simultaneous detection of four categories of diarrheagenic E. coli (ETEC, EPEC,
EHEC and EAEC) in one PCR reaction using six virulent genes. During the period from June 2009 to
September 2009, 50 stool samples were collected from children suffering from diarrhea in Pediatric Teaching
Hospital at Sulaimani and Karkuk cities. E. coli were isolated and diagnosed using set of conventional
biochemical tests and API 20E system. Two different methods of DNA extraction (salting out and boiling) were
used, and then the DNA was used as a template for PCR. The multiplex PCR detected target genes of
diarrheagenic E. coli in 19 out of the 50 diarrheal stools specimens (38%). Genes of ETEC (lt or st) were
detected in 5/19 specimens (26.3%). Gene of EPEC (eae and/or bfp) was detected in 12/19 specimens (63.1% ).
Genes of EAEC was detected in 4/19 specimens (21%), two of them (10.5%) were showed EAEC plus EPEC
and EAEC plus ETEC denoting mixed infection. Genes for EHEC were not detected in any of the diarrheal
specimens. Multiplex PCR for the simultaneous detection of several pathogenic genes in one PCR reaction will
save time and effort involved in analyzing various virulence factors and will help investigators to clarify the
role of Diarrhoeagenic E. coli in diarrheal diseases.
Key words: Diarrheagenic, E. coli, eae, bfp, lt, st, PCVD, stx gene
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Cite this Reference:
Sehand K. Arif and layla I.F. Salih, . Identification of Different Categories of Diarrheagenic Escherichia coli in Stool Samples by Using Multiplex PCR Technique. Asian Journal of Medical Sciences, (5): 237-243.
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ISSN (Online): 2040-8773
ISSN (Print): 2040-8765 |
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