cattlenetwork.com
Bovine viral diarrhea virus (BVDV) was first recognized in the 1940s. One of the first meetings of the Academy of Veterinary Consultants in 1972 discussed the impact BVDV had on feedlot respiratory disease. Today the discussion continues, but now is laced with terminology including immunohistochemistry, cytopathic/non-cytopathic and persistent infection (PI). In the big picture, BVDV is a minor player compared to other factors much more important in determining disease occurrence in feedlots (calf development, animal marketing, age at placement, etc.). It has been implicated in causing immunosuppression leading to increased feedlot morbidity due to bovine respiratory disease (BRD) complex. In the last several years, BVDV has been at the forefront of cattle disease discussions.
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