TABLE 2.

MPN values and prevalence of all three genes (stxI, stxII, and eaeA) in cow waste lagoon waters using nested PCR

SeasonFarmE. coli MPN/100 mlMPN/100 ml for:Data for simultaneous occurrence of stxI, stxII, and eaeA
stxIstxIIeaeAMPN/100 mlPrevalence of stxI, stxII, and eaeA per no. of E. coli isolates
Fall21.6 × 1051.7 × 1031.8 × 1021.4 × 103<1.8 × 1021:>889
31.6 × 1048.3 × 1018.3 × 1011.4 × 1028.3 × 1011:193
41.6 × 1052.8 × 1047.0 × 1034.6 × 1034.6 × 1031:35
51.6 × 1057.8 × 1027.8 × 1027.8 × 1027.8 × 1021:205
Spring11.6 × 1041.7 × 1021.3 × 1022.1 × 1021.3 × 1021:123
31.6 × 1054.9 × 1023.3 × 1025.4 × 1032.3 × 1021:696
41.6 × 1062.0 × 1039.3 × 1032.7 × 1042.0 × 1031:800
52.4 × 1051.8 × 103<1.8 × 1036.8 × 103<1.8 × 1031:>133
Summer31.6 × 1049.3 × 1019.3 × 1016.8 × 1016.8 × 1011:235
42.4 × 1051.7 × 1054.3 × 1041.4 × 1052.3 × 1041:10