Bovine adenovirus serotype 7 infections in postweaning calves.
OBJECTIVE
To detect bovine adenovirus serotype 7 (BAV-7) infections in calves by use of viral isolation and serologic testing.


METHODS
205 postweaning calves.


METHODS
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
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).
Department of Veterinary Pathobiology, College of Veterinary Medicine, Oklahoma State University, Stillwater 74078, USA.
Genny M
GM
Fent
Robert W
RW
Fulton
Jeremiah T
JT
Saliki
Shannon L
SL
Caseltine
Howard D
HD
Lehmkuhl
Anthony W
AW
Confer
Charles W
CW
Purdy
Robert E
RE
Briggs
Raymond W
RW
Loan
Glenn C
GC
Duff
D000257:Adenoviridae Infections / Q000097:blood / Q000662:veterinary* / Q000821:virology; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D046808:Atadenovirus / Q000145:classification / Q000302:isolation & purification*; D002417:Cattle; D002418:Cattle Diseases / Q000097:blood / Q000821:virology*; D009297:Nasal Mucosa / Q000821:virology; D009500:Neutralization Tests / Q000662:veterinary
D000914:Antibodies, Viral