TABLE 4.

Seropathotypes (serotypes and virulence genes) of human STEC isolates (n = 126)

SerotypeaTotal no. of isolatesstx1stx2eaeehxA
O1:H71+
O1:H71+++
O1:H-1+++ (−)b+
O2:H111+
O2:H271+
O2:H-1+
O6:H491++
O8:H111+
O8:H191++
O9:H212+
O20:H191++
O26:H1111++ (β1)+
O26:H111++ (β1)
O26:H111++ (β1)+
O26:H?1++ (β1)+
O26:H-1++ (β1)+
O41:H21++ (−)+
O46:H311+
O64:H251++ (NR)c+
O69:H111++ (β1)+
O75:H81+++
O76:H191++
O77:H411+++ (−)+
O77:H411++
O79:H141+
O81:H?1++
O83:H-1+
O84:H?1++ (ζ)+
O84:H21++ (ζ)+
O91:H211+++
O91:H-2++
O91:H-1+++
O98:H-2++ (ζ)+
O103:H22++ (ε)+
O103:H211+
O110:H281++
O111:H-1++ (−)
O111:H-4+++ (γ2)+
O113:H41++
O113:H41+
O113:H211++
O113:H212+
O116:H-1+
O116:H41++
O117:H281++
O117:H-1++
O118:H162++ (β1)+
O123:H191+
O128:H21+++ (−)+
O141:H21+++
O145:H81++ (γ1)+
O145:H-1++ (γ1)+
O145:H-1++ (γ1)+
O146:H211+
O146:H212+++
O150:H-2++ (ζ)+
O153:H211+
O153:H331+
O153:H-1+
O156:H41+
O156:H-1++ (ζ)+
O157:H711++ (γ1)+
O157:H713+++ (γ1)+
O162:H41++ (−)+
O166:H282+
O172:H-1++ (ε)+
O174:H-2+
OX177:H-1++ (β1)+
ONT:H42++
ONT:H81++
ONT:H81+
ONT:H101++
ONT:H191++
ONT:H211++ (ζ)
ONT:H281+
ONT:H411++
ONT:H?1++ (β1)+
ONT:H-2+++
ONT:H-1+++ (γ2)+
  • a Names of serotypes previously associated with human STEC causing HUS are in boldface characters; names of new serotypes not previously found among human STEC isolates are underlined.

  • b Isolates that were negative for the eae gene [(−)].

  • c Typing of eae (intimin) genes was realized years after the isolation of the strains. Some of them had lost the viability, so eae typing could not be realized [(NR)].