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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
Phenotypic and genotypic analysis of enterotoxigenic escherichia coli in samples obtained from egyptian children presenting to referral hospitals
Journal of Clinical Microbiology, Volume 47, No. 1, Year 2009
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Description
Hospital surveillance was established in the Nile River Delta to increase the understanding of the epidemiology of diarrheal disease among Egyptian children. Between September 2000 and August 2003, samples obtained from children less than 5 years of age who had diarrhea and who were seeking hospital care were cultured for enteric bacteria. Colonies from each culture with a morphology typical of that of Escherichia coli were tested for the heat-labile (LT) and heat-stable (ST) toxins by a GM-1-specific enzyme-linked immunosorbent assay and colonization factor (CF) antigens by an immunodot blot assay. Enterotoxigenic E. coli (ETEC) isolates were recovered from 320/1,540 (20.7%) children, and ETEC isolates expressing a known CF were identified in 151/320 (47%) samples. ST CFA/I, ST CS6, ST CS14, and LT and ST CS5 plus CS6 represented 75% of the CFs expressed by ETEC isolates expressing a detectable CF. Year-to-year variability in the proportion of ETEC isolates that expressed a detectable CF was observed (e.g., the proportion that expressed CFA/I ranged from 10% in year 1 to 21% in year 3); however, the relative proportions of ETEC isolates expressing a CF were similar over the reporting period. The proportion of CF-positive ETEC isolates was higher among isolates that expressed ST. ETEC isolates expressing CS6 were isolated significantly less often (P < 0.001) than isolates expressing CFA/I in children less than 1 year of age. Macrorestriction profiling of CFA/I-expressing ETEC isolates by using the restriction enzyme XbaI and pulsed-field gel electrophoresis demonstrated a wide genetic diversity among the isolates that did not directly correlate with the virulence of the pathogen. The genome plasticity demonstrated in the ETEC isolates collected in this work suggests an additional challenge to the development of a globally effective vaccine for ETEC. Copyright © 2009, American Society for Microbiology.
Authors & Co-Authors
Shaheen, Hind Ibrahim
Egypt, Cairo
U.s. Naval Medical Research Unit No. 3, Egypt
Abdel-Messih, Ibrahim Adib
Egypt, Cairo
U.s. Naval Medical Research Unit No. 3, Egypt
Klena, John David
Egypt, Cairo
U.s. Naval Medical Research Unit No. 3, Egypt
Mansour, Adel Mahmoud
Egypt, Cairo
U.s. Naval Medical Research Unit No. 3, Egypt
El-Wakkeel, Z.
Egypt, Cairo
Egyptian Ministry of Health and Population
Wierzba, Thomas F.
Egypt, Cairo
U.s. Naval Medical Research Unit No. 3, Egypt
Cambodia
U.s. Naval Medical Research
Sanders, John Walton
Egypt, Cairo
U.s. Naval Medical Research Unit No. 3, Egypt
Peru, Lima
Naval Medical Research Unit No. 6
Khalil, Sami B.
Egypt, Cairo
U.s. Naval Medical Research Unit No. 3, Egypt
Rockabrand, David M.
Egypt, Cairo
U.s. Naval Medical Research Unit No. 3, Egypt
United States, Silver Spring
Naval Medical Research Center
Monteville, Marshall R.
Egypt, Cairo
U.s. Naval Medical Research Unit No. 3, Egypt
Rozmajzl, Patrick J.
Egypt, Cairo
U.s. Naval Medical Research Unit No. 3, Egypt
Italy
Navy Environmental and Preventive Medicine
Svennerholm, Ann Mari L.
Sweden, Gothenburg
Göteborgs Universitet
Frenck, Robert W.
Egypt, Cairo
U.s. Naval Medical Research Unit No. 3, Egypt
United States, Cincinnati
Cincinnati Children's Hospital Medical Center
Statistics
Citations: 59
Authors: 13
Affiliations: 8
Identifiers
Doi:
10.1128/JCM.01282-08
ISSN:
00951137
Research Areas
Genetics And Genomics
Health System And Policy
Infectious Diseases
Maternal And Child Health