Table 3.

Results of VT genotyping

VT genotypeTotal no.No. and type of isolate in indicated group
Serogroup O157Other O serogroups
HumanAnimalHumanAnimal
VT1118009523
VT2421601412
VT2vh-a3327141
VT2vh-b90054
VT2vh atypicala1500123
VT2 + VT2vh-a3228031
VT2 + VT2vh-b60015
VT2d-Ount2300158
VT2d-OX3a30012
VT2vh-a + VT2d-Ount10001
VT1 + VT253011
VT1 + VT2vh-a2120100
VT1 + VT2vh-b40013
VT1 + VT2vh-atypicala10010
VT1 + VT2d-Ount38002810
VT1 + VT2 + VT2vh-a11000
VT1 + VT2 + VT2vh-b10010
VT2e60042
Total35995218676
  • a Positive with VT2v1 and VT2v-2 primers and negative with VT2-cm and VT2-f primers, but restriction of amplicons obtained with VT2-c and VT2-d primers and with VT2-e and VT2-f primers does not fit predicted RFLP patterns.