Symptoms of BVD High fever (107-110° F) Profuse diarrhea Oral ulcers Anorexia Suppresses all immune function
Fetal Symptoms of BVD Death of fetus if infected in the first 120 days of pregnancy Abortion Congenital malformations of nervous system and eyes; blindness and underdeveloped brains Skeletal defects Fetus does not recognize BVD therefore it is unable to fight the virus, resulting in death. Cow survives if vaccinated.
Conclusions BVD would explain the abnormal abortions in Mr. Lang’s herd. The new heifer must have been infected with BVD before her vaccinations (rendering them useless.) The herd was improperly vaccinated. A necessary 3-week booster was not administered.
What Mr. Lang Should Do Segregate all new animals Follow vaccination instructions in the future Promptly remove fetuses and placentas as they may carry the disease Test animals; cull those with 4x elevated titers 30 days apart