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Bovine adenovirus serotype 7 infections in postweaning calves
Genny M Fent1, Robert W Fulton, Jeremiah T Saliki
1Department of Veterinary Pathobiology, College of Veterinary Medicine, Oklahoma State University, Stillwater 74078, USA.
Objective:
To detect bovine adenovirus serotype 7 (BAV-7) infections in calves by use of viral isolation and serologic testing.
Animals:
205 postweaning calves.
Procedure:
121 calves were assembled by an order buyer through auction markets in eastern Tennessee and transported to New Mexico where they were commingled with 84 healthy ranch-reared calves. Tests included viral isolation in cell culture from peripheral blood leukocytes (PBL) and detection of serum BAV-7 antibodies by use of microtitration viral neutralization.
Results:
BAV-7 was isolated from PBL of 8 calves and seroconversion to BAV-7 was detected for 38 of 199 (19.1%) calves. Concurrent bovine viral diarrhea virus infections were detected in most calves from which BAV-7 was isolated.
Conclusions And Clinical Relevance:
Results of our study indicate that BAV-7 infections can be found in postweaning commingled calves and may develop more commonly in calves with concurrent infections with viruses such as bovine viral diarrhea virus (BVDV).