Abortions in bovines and Neospora caninum transmission in an embryo transfer center

Veterinary Parasitology
Vanessa Silvestre Ferreira de OliveiraAndréa Caetano da Silva

Abstract

Neosporosis is considered to be one of the main causes of abortions in bovines. In this study we evaluated the congenital transmission and occurrence of abortions by Neospora caninum in an embryo transfer center in Neropolis, Goiás. Serological samples from 101 recipients, 61 donors, and 90 calves were analyzed. Among these animals, 32.67% of the recipients, 22.22% of the donors, and 6.66% of the calves were positive for N. caninum. The rate of vertical transmission was 24%. There was a statistically significant difference between antibody titer of the recipient cows and the serological status of the calves. There was no statistically significant relationship between N. caninum serological status and reproductive rates such as estrum repetition and embryo production. Eight abortions occurred, six (75%) in positive females and two (25%) in negative females. These results indicate that neosporosis may be an important cause of failing reproduction and that in embryo transfer centers recipients should be previously examined, and those that are seronegative for Neospora should be chosen to reduce abortion and the birth of seropositive calves.

References

Jul 1, 1989·Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·J P Thilsted, J P Dubey
Sep 17, 1999·Veterinary Parasitology·L F GondimI Yamane
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Apr 2, 2003·The Korean Journal of Parasitology·J P Dubey, John Dubey
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Mar 24, 2004·International Journal for Parasitology·Luis F P GondimDoris E Zemlicka

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Citations

Sep 7, 2014·Comparative Immunology, Microbiology and Infectious Diseases·Eudes Esteves do NascimentoJoão Luis Garcia
Jun 28, 2011·Veterinary Parasitology·J P Dubey, G Schares
Oct 14, 2016·Revista brasileira de parasitologia veterinária = Brazilian journal of veterinary parasitology : Órgão Oficial do Colégio Brasileiro de Parasitologia Veterinária·Inalda Angélica de Souza RamosCarla Lopes de Mendonça

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