Congenital Neospora infection in calves born from cows that had previously aborted Neospora-infected fetuses: four cases (1990-1992).

B. C. Barr, Patricia A Conrad, R. Breitmeyer, K. Sverlow, Mark L Anderson, J. Reynolds, A. E. Chauvet, J. P. Dubey, Alex Ardans

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139 Scopus citations

Abstract

Four dairy cows that had been successfully rebred following fetal Neospora infection and abortion were identified from 2 drylot dairies. All 4 cows had uncomplicated pregnancies with the birth of 5 full-term calves. The calves all had high precolostral serum IgG antibodies. The precolostral antibodies to Neospora sp as determined by indirect fluorescent antibody test ranged from 5,120 to 20,480, compared with maternal serum and colostral antibody titers from 320 to 1,280. Two calves had mild neurologic limb deficits. Three calves had mild nonsuppurative encephalomyelitis and Neospora organisms were found in the CNS of 3 calves. Findings indicate that repeat transplacental Neospora infections occur in cows. Additionally, calves born from cows with a history of Neospora fetal infection and abortion may have congenital Neospora infections and/or neurologic dysfunctions at birth. The Neospora indirect fluorescent antibody test appears to be a useful antemortem test for detection of calves exposed in utero to Neospora organisms.

Original languageEnglish (US)
Pages (from-to)113-117
Number of pages5
JournalJournal of the American Veterinary Medical Association
Volume202
Issue number1
StatePublished - Jan 1 1993

ASJC Scopus subject areas

  • veterinary(all)

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