What role do viruses like IBR play in pinkeye disease?
Dr. Lisle George of UC-Davis reported, in the American Journal of Veterinary Research, that IBR virus vaccines tend to inhibit pinkeye-fighting immune cells. He suggests not using MLV IBR vaccines in the face of a pinkeye outbreak. He recommends waiting until the break has cleared up. Bruce Addison (president of Addison Biological Laboratory, Inc.) has said and believed for years that the IBR virus colonizes in the ocular tissue and interferes with the immune response. In some instances where our product was perceived to have failed, we’ve discovered that the herd had subclinical or clinical IBR disease. Note: IBR, Chlamydia and Mycoplasma can cause eye problems. In one instance in Decorah, IA where we were investigating a perceived pinkeye outbreak, post M/G vaccination, Bruce Addison noted classic buccal ulcers on the mouth of several cows. He asked the veterinarian about any recent herd history with BVD. The veterinarian confirmed the herd was being treated for BVD. Bruce reminded h
