A survey of causes of bovine abortion occurring in the San Joaquin Valley, California.

Mark L Anderson, Patricia C Blanchard, B. C. Barr, R. L. Hoffman

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

The causes of abortion in cattle in the San Joaquin Valley of California were surveyed from submissions to the California Veterinary Diagnostic Laboratory at Tulare. Four hundred sixty-eight abortion cases were examined. Most submissions (89%) were from large drylot dairies, milking an average of 814 cows. Abortion evaluations included necropsy, histopathology, bacteriology, virology, and other immunologic and serologic tests. A specific cause was identified in 29.5% of the abortions. Bacterial infections, most of which were sporadic, accounted for 16% of all abortions. Viral causes and protozoal infections were diagnosed in 5.6% and 3.2% of the abortions, respectively. Fetuses with protozoal infection had histologic lesions of focal nonsuppurative necrotizing encephalitis, and protozoa were detected. Similar histologic lesions were seen in 80 additional fetuses (17.1%), and although an etiologic agent was not identified for these cases, a protozoal infection was suspected.

Original languageEnglish (US)
Pages (from-to)283-287
Number of pages5
JournalJournal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc
Volume2
Issue number4
StatePublished - Oct 1990

ASJC Scopus subject areas

  • Microbiology
  • veterinary(all)

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