What is the USDA's criterion for states or zones to gain Bovine Tuberculosis (bTB) Free Status?

The criterion for states or zones to gain Bovine Tuberculosis (bTB) Free Status is based on having a herd prevalence of zero for bTB. This means that in order for a state or zone to be granted this status, there must be no confirmed cases of bovine tuberculosis in the cattle herds within that area. A herd prevalence of zero signifies that the disease is effectively eradicated and that there are no ongoing infections that could pose a risk of transmission within the cattle population.

This standard is crucial for maintaining the health of livestock and protecting the agriculture industry from the economic impacts of outbreaks. Without a zero prevalence, there would be a risk of the disease spreading, which could lead to significant repercussions for animal health, public health, and trade regulations. Therefore, achieving and maintaining a herd prevalence of zero is a fundamental requirement for any state or zone seeking to achieve and retain bTB Free Status.