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Journal of Veterinary Diagnostic Investigation, Vol 10, Issue 2, 130-134
Copyright © 1998 by American Association of Veterinary Laboratory Diagnosticians

Articles

Detection of cytopathic bovine viral diarrhea virus in the ovaries of cattle following immunization with a modified live bovine viral diarrhea virus vaccine

DL Grooms, KV Brock, and LA Ward

Ohio Agricultural Research and Development Center, Food Animal Health Research Program, Wooster 44691, USA.

Economic loss from infection with bovine viral diarrhea virus (BVDV) is of worldwide concern. The unique pathogenesis and antigenic variability of BVDV have made this virus challenging to control. Vaccination programs are a major component of control and prevention strategies. Both killed and modified live vaccines are commercially available. Choice between killed and modified live vaccines is controversial. Of major concern is the safety of modified live vaccines. Little information is available on their tissue tropism and potential for causing pathology, especially with respect to the reproductive system. The objective of this study was to determine if BVDV could be detected in the ovary of cattle following immunization with a modified live BVDV vaccine. In 2 separate trials, 6 heifers and 4 mature cows were immunized with a modified live BVDV vaccine and ovaries were removed between 7 and 30 days postvaccination. Cytopathic BVDV was isolated from ovaries removed on days 8, 10, and 12. BVDV antigen was detected using immunohistochemistry on days 10-30. These findings are significant because replication of virus in the ovary could cause ovarian dysfunction, resulting in reduced fertility.


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Copyright © 1998 by the American Association of Veterinary Laboratory Diagnosticians, Inc.