Neospora caninum: analysis of reproductive parameters in dairy herds in Brazil

Authors

  • José Márcio Sbruzzi Cardoso Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, São Paulo, SP
  • Marcos Amaku Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, São Paulo, SP
  • Ana Júlia Urias dos Santos Araujo Universidade de Taubaté, Instituto Básico de Biociências, Taubaté, SP

DOI:

https://doi.org/10.11606/issn.1678-4456.v49i6p459-464

Keywords:

Neospora caninum, Abortion risk, Repeated abortion, Reproduction parameters

Abstract

Neosporosis is one of the most important causes of abortion in both dairy and beef cattle in many countries. The objective of this study was to quantify the effect of Neospora caninum seropositivity on reproductive parameters in three dairy herds and the dynamics of anti-N. caninum antibodies during gestation in naturally infected cows. Blood samples from all animals were collected nine times on each of the three farms over a two-year period. Serum was tested for antibodies against N. caninum using the indirect fluorescent antibody test (IFAT) with a cutoff value of 1:100. The relative risk of abortion between N. caninum-seropositive and seronegative cows varied between samplings at all farms, but there was only a statistically significant difference (P<0.05) on Farm III in samplings 4, 7 and 8, with positive animals presenting higher risk of abortion. No significant differences (P>0.05) were found regarding gestational age at abortion, repeated abortion, number of inseminations for conception and calving intervals, between seropositive and seronegative cows on all the farms.

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Published

2012-12-11

Issue

Section

UNDEFINIED

How to Cite

1.
Cardoso JMS, Amaku M, Araujo AJU dos S. Neospora caninum: analysis of reproductive parameters in dairy herds in Brazil. Braz. J. Vet. Res. Anim. Sci. [Internet]. 2012 Dec. 11 [cited 2024 May 26];49(6):459-64. Available from: https://www.revistas.usp.br/bjvras/article/view/53922