title: Bovine non-O157 Shiga toxin 2-containing Escherichia coli isolates commonly possess stx2-EDL933 and/or stx2vhb subtypes.
abstract: stx(2) genes from 138 Shiga toxin-producing Escherichia coli (STEC) isolates, of which 127 were of bovine origin (58 serotypes) and 11 of human origin (one serotype; O113:H21), were subtyped. The bovine STEC isolates from Australian cattle carried ehxA and/or eaeA and predominantly possessed stx(2-EDL933) (103 of 127; 81.1%) either in combination with stx(2vhb) (32 of 127; 25.2%) or on its own (52 of 127; 40.4%). Of 22 (90.9%) bovine isolates of serotype O113:H21, a serotype increasingly recovered from patients with hemolytic uremic syndrome (HUS) or hemorrhagic colitis, 20 contained both stx(2-EDL933) and stx(2vhb); 2 isolates contained stx(2vhb) only. Although 7 of 11 (63.6%) human O113:H21 isolates associated with diarrhea possessed stx(2-EDL933), the remaining 4 isolates possessed a combination of stx(2-EDL933) and stx(2vhb). Three of the four were from separate sporadic cases of HUS, and one was from an unknown source.
authors.affiliation: Elizabeth Macarthur Agricultural Institute, Camden, New South Wales, Australia 2570.
authors.forename: Kim N
authors.initials: KN
authors.lastname: Brett
authors.forename: Michael A
authors.initials: MA
authors.lastname: Hornitzky
authors.forename: Karl A
authors.initials: KA
authors.lastname: Bettelheim
authors.forename: Mark J
authors.initials: MJ
authors.lastname: Walker
authors.forename: Steven P
authors.initials: SP
authors.lastname: Djordjevic
mesh_terms: D018829:Adhesins, Bacterial / Q000235:genetics / Q000378:metabolism; D000818:Animals; D002352:Carrier Proteins / Q000235:genetics / Q000378:metabolism; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology*; D004926:Escherichia coli / Q000145:classification* / Q000235:genetics / Q000378:metabolism / Q000472:pathogenicity*; D004927:Escherichia coli Infections / Q000382:microbiology / Q000662:veterinary*; D029968:Escherichia coli Proteins / Q000235:genetics / Q000378:metabolism; D006460:Hemolysin Proteins / Q000235:genetics / Q000378:metabolism; D006801:Humans; D012703:Serotyping; D022622:Shiga Toxin 1 / Q000235:genetics / Q000378:metabolism; D022641:Shiga Toxin 2 / Q000145:classification* / Q000235:genetics / Q000378:metabolism; D037521:Virulence Factors / Q000235:genetics / Q000378:metabolism
chemical_list: D018829:Adhesins, Bacterial; D002352:Carrier Proteins; D029968:Escherichia coli Proteins; D006460:Hemolysin Proteins; C036507:Hlya protein, E coli; D022622:Shiga Toxin 1; D022641:Shiga Toxin 2; D037521:Virulence Factors; C073819:eaeA protein, E coli