Abstract
We analyzed a randomly selected group of 30 diffusely adherent (DAEC), 30 enteropathogenic, 30 enteroaggregative, and five Shiga toxin-producing Escherichia coli strains isolated from children with diarrhea. Enterotoxigenic E. coli (ETEC) colonization factors (CFs) were evaluated by a dot-blot assay using 21 CF-specific monoclonal antibodies. Out of 95 non-ETEC strains, three DAEC were found to express coli surface antigen 20 (CS20). No other E. coli expressed CFs. We confirmed the three CS20-positive strains as ETEC-negative by repeat PCR and as toxin-negative by ganglioside-GM1-enzyme-linked immunosorbent assay. To our knowledge, this is the first study that has identified currently recognized CFs in non-ETEC diarrheagenic E. coli strains identified using molecular methods. CFs may be an unrecognized relevant adherence factor in other E. coli, which may then play a role in pathogenesis and the immune response of the host. FEMS Immunology & Medical Microbiology
Original language | English |
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Pages (from-to) | 186-189 |
Number of pages | 4 |
Journal | FEMS Immunology and Medical Microbiology |
Volume | 60 |
Issue number | 2 |
DOIs | |
State | Published - Nov 2010 |
Keywords
- Children
- Colonization factor antigens
- Diarrhea
- Diarrheagenic Escherichia coli
- Diffusely adherent Escherichia coli
- Enterotoxigenic Escherichia coli