An Effort to Isolate Mycobacterium bovis from Environmental Substrates during Investigations of Bovine Tuberculosis Transmission Sites (Cattle Farms and Wildlife Areas) in Michigan,
USA
Figure 1
Map of Michigan indicating the Bovine Tuberculosis State Status Designations: (1) modified accredited (infected zone) and (2) modified accredited advanced (disease-free zone). Source: Michigan Department of Agriculture, http://www.michigan.gov/bovinetb.