TABLE 1.

Distribution of L. monocytogenes ribotypes among case and control farms

Subtype (lineage)	No. of L. monocytogenes isolates
	Case farms					Control farms
	Fecal	Feed	Soil	Water	Total (%)	Fecal	Feed	Soil	Water	Total (%)
DUP-1023A (II)	2	0	4	2	8 (3.1)	0	1	2	1	4 (2.5)
DUP-1023B (II)	1	1	0	1	3 (1.2)	0	2	0	0	2 (1.3)
DUP-1030B (II)	0	1	2	4	7 (2.7)	2	0	2	0	4 (2.5)
DUP-1038B (I)	6	2	1	1	10 (3.9)	1	0	0	2	3 (1.9)
DUP-1039A (II)	1	2	3	2	8 (3.1)	1	3	1	3	8 (5.1)
DUP-1039C (II)	9	4	15	11	39 (15.2)	11	4	5	2	22 (13.9)
DUP-1039E (II)	7	3	2	3	15 (5.9)	5	5	4	10	24 (15.2)
DUP-1042B (I)	13	9	18	5	45 (17.6)	0	4	4	7	15 (9.5)
DUP-1042C (I)	4	1	2	1	8 (3.1)	0	0	0	0	0
DUP-1044A (I)	1	0	0	0	1 (0.4)	5	2	1	0	8 (5.1)
DUP-1044B (I)	1	4	3	0	8 (3.1)	0	0	0	1	1 (0.6)
DUP-1045A (II)	0	1	3	2	6 (2.3)	3	5	6	4	18 (11.4)
DUP-1045B (II)	5	0	1	4	10 (3.9)	0	0	1	0	1 (0.6)
DUP-1045D (II)	1	6	1	1	9 (3.5)	1	1	1	2	5 (3.2)
DUP-1045E (II)	2	3	4	6	15 (5.9)	0	0	0	0	0
DUP-1052A (I)	0	3	0	0	3 (1.2)	0	2	2	0	4 (2.5)
DUP-1054A (II)	1	1	1	1	4 (1.6)	1	0	0	0	1 (0.6)
DUP-1062D (II)	2	0	2	0	4 (1.6)	0	2	0	2	4 (2.5)
DUP-1062E (II)	2	1	0	3	6 (2.3)	1	1	1	1	4 (2.5)
DUP-1062F (II)	0	0	1	0	1 (0.4)	1	0	4	0	5 (3.2)
110-239-S2	2	2	3	0	7 (2.7)	0	0	1	0	1 (0.6)
Other ribotype	8	6	13	12	39 (15.2)	7	5	6	6	24 (15.2)
Lineage I	32	24	34	12	102 (39.8)	9	9	10	10	38 (24.1)
Lineage II	35	26	45	47	153 (59.8)	30	28	29	30	117 (74.1)
Lineage III	1	0	0	0	1 (0.4)	0	0	2	1	3 (1.9)
Total	68	50	79	59	256	39	37	41	41	158