johndeere1 - 4/11/2025 12:29
The cows will have a positive Johns’s test after vaccine and also a positive tb test I am told. That’s why they don’t use it up here. No one wants a false positive tb test.
Yes you are correct. The Johnes vaccine can cause a false TB test result. It also usually leaves a lump at the injection site that never seems to go away.
I don't know anyone using the Johnes vaccine anymore. I would not recommend it for the reasons stated above. Use Rumensin and follow the prevention protocols. | 
Johnes control
