TABLE 4.

Percentages of cow, calf, and environmental samples positive for a PFGE pattern on Michigan dairy farms^a

Farm	Serotype	PFGE pattern	AMR pattern	Date (mo/day/yr)	All samples		Cow samples		Calf samples		Environmental samples
					% positive	No. positive/total	% positive	No. positive/total	% positive	No. positive/total	% positive	No. positive/total
101	S. Montevideo	MSU.Smo.Xb5		8/3/2009	19	8/42	28	8/29	0	0/6	0	0/7
101	S. Montevideo	MSU.Smo.Xb9		8/3/2009	17	7/42	10	3/29	0	0/6	57	4/7
101	S. Typhimurium	MSU.Sty.Xb6	ACSSuT	7/20/2000	10	4/41	4	1/28	60	3/5	0	0/8
111	S. Bovismorbificans	MSU.Sbo.Xb3		10/23/2000	54	30/56	50	22/44	50	2/4	75	6/8
111	S. Bovismorbificans	MSU.Sbo.Xb3		12/20/2000	36	18/50	39	14/36	50	3/6	13	1/8
111	S. Bovismorbificans	MSU.Sbo.Xb3		3/13/2001	26	15/58	18	7/38	30	3/10	50	5/10
111	S. Bovismorbificans	MSU.Sbo.Xb3		5/11/2001	29	14/48	26	9/34	33	2/6	38	3/8
111	S. Bovismorbificans	MSU.Sbo.Xb3		8/9/2001	48	29/60	59	24/41	38	3/8	18	2/11
114	S. Muenster	MSU.Smn.Xb1		11/3/2000	48	24/50	47	17/36	67	4/6	38	3/8
114	S. Muenster	MSU.Smn.Xb1		1/2/2001	12	6/52	3	1/35	44	4/9	13	1/8
114	S. Muenster	MSU.Smn.Xb1		4/13/2001	18	9/51	11	4/36	50	3/6	22	2/9
114	S. Muenster	MSU.Smn.Xb1		6/4/2001	23	15/64	25	11/44	0	0/8	33	4/12
114	S. Muenster	MSU.Smn.Xb1		8/6/2001	22	11/49	24	9/37	0	0/4	25	2/8
114	S. 4,5,12:I:-	MSU.Smp.Xb1		7/22/2009	16	8/49	18	6/34	22	2/9	0	0/6
114	S. Typhimurium	MSU.Sty.Xb10		7/22/2009	16	8/49	15	5/34	22	2/9	17	1/6
125	S. Bovismorbificans	MSU.Sbo.Xb3		7/22/2009	19	9/48	22	6/27	20	3/15	0	0/6
125	S. Muenster	MSU.Smn.Xb6		8/21/2001	24	14/59	33	13/40	10	1/10	0	0/9
129	S. Senftenberg	MSU.Snf.Xb1	GKSSuT	7/31/2001	15	10/66	5	2/40	41	7/17	11	1/9
129	S. Senftenberg	MSU.Snf.Xb1	GKSSuT	9/13/2001	16	10/64	3	1/40	53	8/15	11	1/9

^aShown where the total proportion of positive samples was higher than 10%.