Effects of exposure to calves persistently infected with bovine viral diarrhea virus type 1b and subsequent infection with Mannheima haemolytica on clinical signs and immune variables: model for bovine respiratory disease via viral and bacterial interaction.
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C. Krehbiel | C. Richards | A. Confer | R. Fulton | M. Montelongo | D. Step | L. Burciaga-Robles | B. Holland