Table 1.

Characterization results of 14 VTEC strains isolated from stool samples of 14 different asymptomatic human carriers

SerotypeNo. of isolatesSex/workplaceaVCAbToxin type(s)Virulence factor presenceSorbitol/β-d-glucuronidase
eae60-MDa plasmidE-hlyAastA
O27:H302M/L+VT2+
O76:H191M/L+VT1+++
O102:H61M/S+VT2+++
O113:H41M/L+VT1, VT2++++
O121:H112M/S+VT2+
O146:H281F/P+VT2+
OX178:H71F/BS+VT2+
O rough:H21M/C+VT1, VT2+++
O rough:H191M/BS+VT1+++
ONT:H21F/P+VT2+++
ONT:H211M/BS+VT2+
ONT:H251F/P+VT1++++
  • a M, male; F, female; BS, butcher shop; C, cutting; L, logistics; P, processing; S, slaughtering.

  • b VCA, Vero cytotoxin production examined in the Vero cell assay.