Table 1.

Fecal and environmental culture results

Sampling date	Number of Salmonella-positive samples/total (%)
	Lactating cows	Calves	Environment	Total
08 Feb 2008	1a
12 Feb	0/90	0/67	6/42 (14 %)	6/199 (3.0 %)
27 Feb	1/89 (1.1 %)	1/66 (1.5 %)	0/41	2/196 (1.0 %)
08 Mar	0/96	0/69	0/47	0/212
18 Mar	0/89	0/70	0/46	0/205
03 Apr	1/88 (1.1 %)	0/71	5/135 (3.7 %)	6/294 (2.0 %)
17 Apr	0/83	0/66	0/51	0/200
07 May	0/84	0/58	0/50	0/192
21 May	0/117	0/33	0/50	0/200
4 Jun	0/110	0/40	0/50	0/200
18 Jun	0/108	0/39	0/50	0/197
16 Jul	0/106	0/43	0/50	0/199
11 Aug	1/90 (1.1 %)	0/54	0/50	1/194 (0.51 %)
14 Aug	N	N	0/23	0/23
1 Sep	0/24	N	N	0/24
16 Sep	0/85	0/63	0/56	0/204
22 Oct	0/89	0/57	0/56	0/202
13 Feb 2009	0/89	0/58	0/50	0/197
Total	3/1437 (0.20 %)	1/854 (0.11 %)	11/847 (1.3 %)	15/3138 (0.48 %)

N not done, a initial case