Combined histological examination and avidin-biotin immunohistochemical staining of formalin-fixed
brain and myocardium from aborted bovine foetuses presented to the Allerton Regional Veterinary
Laboratory were utilized for the diagnosis of bovine neosporosis. Two out of 144 cases were diagnosed
positive for neosporosis, indicating a low prevalence of infection and confirming Neospora caninum to
be a cause of sporadic abortion in the population surveyed.
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