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. 1990 Feb;28(2):293–295. doi: 10.1128/jcm.28.2.293-295.1990

Serotypes of Escherichia coli that hybridized with DNA probes for genes encoding Shiga-like toxin I, Shiga-like toxin II, and serogroup O157 enterhemorrhagic E. coli fimbriae isolated from adults with diarrhea in Thailand.

K A Bettelheim 1, J E Brown 1, S Lolekha 1, P Echeverria 1
PMCID: PMC269593  PMID: 1968907

Abstract

Escherichia coli strains isolated from adults with diarrhea in Bangkok, Thailand, were examined for hybridization with DNA probes for genes that code for Shiga-like toxin (SLT)-I, SLT-II, and serogroup O157 enterhemorrhagic E. coli (EHEC) fimbriae. Seven isolates that hybridized with the SLT-I, SLT-II, and O157 EHEC fimbria probes and produced verocytotoxin (VT; group A) were isolated from two patients with diarrhea. Two strains that hybridized with only the SLT-II probe and the O157 EHEC fimbria probe and were VT+ (group B) were isolated from two patients with diarrhea, 7 strains that hybridized with only the SLT-II probe and were VT+ (group C) were isolated from two patients with diarrhea, and 26 strains that hybridized with only the O157 EHEC fimbria probe and were VT- (group D) were isolated from four patients with diarrhea. Seven strains in group A had serotypes O2:H1 (n = 1), O110:H19 (n = 1), and Ont:H8 (n = 5); 2 strains in group B were O112ab:H21 (n = 1) and O113:H21 (n = 1); 7 strains in group C were O6:H28 (n = 1), O22:H16 (n = 1), O52:H25 (n = 1), O112ab:H21 (n = 1), OR:H45 (n = 2), and OR:H11 (n = 1); and 26 strains in group D were O76:H7 (n = 18), O146:H3 (n = 2), O146:H10 (n = 1), O146:Hnt (n = 1), OR:H16 (n = 1), Ont:H2 (n = 1), Ont:H8 (n = 1) and Ont:H16 (n = 1). In Thailand, E. coli strains that hybridized with SLT-I, SLT-II, and O157 EHEC fimbria probes were of a variety of serotypes, none of which were O157:H7.

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Selected References

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