How can I prevent my animals from getting Johnes Disease?
The best way to avoid introducing this disease into your herd is to be as certain as possible that animals brought into the herd are not infected with M. paratuberculosis . Using the laboratory tests mentioned above for pre-purchase screening of animals is a good start. However, it is important to understand the limitations of the tests: Those done on individual animals are not able to detect every infected animal. It is much more reliable to buy from herds in which all adults have been tested negative, or in which at least 30 adults have been tested.
