Table 6.

Overall distribution of virulence factors in 168 human and bovine STEC isolates of serotypes O26:H11, O103:H2, O111:H8, O111:H−, O145:H−, and O157:H7 (set 3)

Gene or characteristicDistributiona
Overall  (n = 168)Bovine  (n = 77)Human  (n = 91)HUS + BD  (n = 46)D + NS  (n = 45)
ehxA158 (94.0)73 (94.8)85 (93.4; 0.7026)45 (97.8; 0.4117)40 (88.9; 0.2277)
espP140 (83.3)69 (89.6)71 (78.0; 0.0446)37 (80.4; 0.0224)34 (75.6; 0.0389)
eae168 (100.0)77 (100.0)91 (100.0; 1.0000)46 (100; 1.0000)45 (100; 1.0000)
stx1129 (76.8)67 (87.0)62 (68.0; 0.0039)26 (56.5; 0.0001)36 (80.0; 0.3027)
stx283 (49.4)37 (48.1)46 (50.5; 0.7470)33 (71.7; 0.0103)13 (28.9; 0.0378)
HEp-2b0.991 (SD = 0.741)0.847 (SD = 0.557)1.112 (SD = 0.852; 0.0203)1.004 (SD = 0.682; 0.1667)1.223 (SD = 0.992; 0.0083)
  • a The first number in parentheses indicates the percentage of the total category positive for the respective characteristic. The second number in parentheses for the last three columns indicates the P value for the comparisons with the isolates of bovine origin in chi-square tests.

  • b HEp-2, level of adherence on HEp-2 cell cultures measured in proportion to a positive control.