TABLE 1.

Distribution of L. monocytogenes ribotypes among case and control farms

Subtype (lineage)No. of L. monocytogenes isolates
Case farmsControl farms
FecalFeedSoilWaterTotal (%)FecalFeedSoilWaterTotal (%)
DUP-1023A (II)20428 (3.1)01214 (2.5)
DUP-1023B (II)11013 (1.2)02002 (1.3)
DUP-1030B (II)01247 (2.7)20204 (2.5)
DUP-1038B (I)621110 (3.9)10023 (1.9)
DUP-1039A (II)12328 (3.1)13138 (5.1)
DUP-1039C (II)94151139 (15.2)1145222 (13.9)
DUP-1039E (II)732315 (5.9)5541024 (15.2)
DUP-1042B (I)13918545 (17.6)044715 (9.5)
DUP-1042C (I)41218 (3.1)00000
DUP-1044A (I)10001 (0.4)52108 (5.1)
DUP-1044B (I)14308 (3.1)00011 (0.6)
DUP-1045A (II)01326 (2.3)356418 (11.4)
DUP-1045B (II)501410 (3.9)00101 (0.6)
DUP-1045D (II)16119 (3.5)11125 (3.2)
DUP-1045E (II)234615 (5.9)00000
DUP-1052A (I)03003 (1.2)02204 (2.5)
DUP-1054A (II)11114 (1.6)10001 (0.6)
DUP-1062D (II)20204 (1.6)02024 (2.5)
DUP-1062E (II)21036 (2.3)11114 (2.5)
DUP-1062F (II)00101 (0.4)10405 (3.2)
110-239-S222307 (2.7)00101 (0.6)
Other ribotype86131239 (15.2)756624 (15.2)
Lineage I32243412102 (39.8)99101038 (24.1)
Lineage II35264547153 (59.8)30282930117 (74.1)
Lineage III10001 (0.4)00213 (1.9)
Total6850795925639374141158