An Effort to Isolate Mycobacterium bovis from Environmental Substrates during Investigations of Bovine Tuberculosis Transmission Sites (Cattle Farms and Wildlife Areas) in Michigan, USA

Table 4

Mycobacterial culture results of environmental substrates collected from bovine tuberculosis-positive farms.

	Total	AFB + (%)	Contamination + (%)
Pasture and vegetation	79	13 (16%)	15 (19%)
Soil	75	13 (17%)	32 (43%)
Open water	78	2 (3%)	12 (30%)
Hay	50	5 (10%)	10 (20%)
Cattle feed	10	3 (30%)	2 (20%)
Barn water	4	0 (0%)	0 (0%)
Bedding	22	0 (0%)	9 (41%)
Manure	40	1 (3%)	12 (30%)
Manure mix	23	6 (26%)	12 (52%)
Deer feces	10	0 (0%)	4 (40%)
Wildlife feces	17	1 (6%)	3 (18%)
Bear hair	1	0 (0%)	0 (0%)
	409	44 (11%)	111 (27%)