Tuberculosis in white-tailed deer in Michigan is another example of a disease in wildlife that threatens domestic livestock. Cattle herds in the area are at risk until the outbreak is eradicated from deer. Nationwide, tuberculosis in cattle has almost been eliminated. This foci of infection remains an obstacle to eradication as the program to eliminate this disease in the nation's cattle herds moves closer to success. Forty-five states are officially free of the disease.
Diseases are the producer's greatest enemy.