Table 3.

Association between serotype and virulence factor profiles among 90 STEC isolates

SerotypeNo. of isolatesVirulence factor profile (no.)WSBA resultcVero cell assay resultSorbitol fermentationProperty type (no.)a
O4:H251ehxA stx1stx2++PL (1)
O5:Hb16ehxA stx1stx2(3)+++MS (6), PL (2)
ehxA stx1(12)+++
eaeA stx1+++
O8:Hnt2ehxA stx2+++PL (1), MS (1)
+
O8:H491ehxA stx2+MS (1)
(O8):K25:H162ehxA stx1stx2 (2)+++MS (1)
O75:H4ehxA stx1stx2 (2)++MS (2)
ehxA stx1(2)++
O75:H402ehxA stx1stx2+MS (1), PL (1)
++
O84:H2ehxA stx1+++MS (1), PL (1)
ehxA eaeA stx1+++
O84:H161ehxA stx1stx2+MS (1)
O85:H495eaeA stx1(3)+MS (2)
eaeA ehxA stx2+
ehxA stx1+
O91:Hb22ehxA stx1 (9)+++MS (5), PL (1)
(8)++
(1)+
ehxA stx1stx2(2)++
(2)+++
O91:H281ehxA stx1stx2+PL (1)
O123:H8ehxA eaeA stx2stx1++MS (1), PL (4)
+++
ehxAstx1(3)+++
ehxA stx1stx2(3)+++
O128:H2b11ehxA stx1 (8)+++MS (3), PL (2)
ehxA stx1stx2(3)+++
O136:H401eaeA stx1++MS (1)
O157:Hb2ehxA stx1stx2eaeA++MS (2)
eaeA stx2++
O166:H491ehxA stx1+MS (1)
OX3:HR1ehxA stx1+++MS (1)
OX3:H21ehxA stx1+++MS (1)
Ont:H46ehxA stx1(5)+++MS (3), PL (1)
++
  • a PL, prime lamb; MS, mutton sheep.

  • b Serotype associated with human disease.

  • c A positive result indicates the ability to express enterohemolysin.