Antibody dynamics during gestation in cows naturally infected with Neospora caninum from four dairy herds in Brazil
Neospora caninum has been described as an important cause of abortion in bovine worldwide. The objective of the present study was to characterize patterns of antibody dynamics during gestation in dairy cows naturally infected with N. caninum. Twelve N. caninum naturally infected cows were selected f...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2009 |
| País: | Brasil |
| Institución: | Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP) |
| Repositorio: | Brazilian Journal of Veterinary Research and Animal Science |
| Idioma: | portugués |
| OAI Identifier: | oai:revistas.usp.br:article/26789 |
| Acceso en línea: | https://www.revistas.usp.br/bjvras/article/view/26789 |
| Access Level: | acceso abierto |
| Palabra clave: | Neospora caninum Antibody dynamics Antibody titer Pregnancy Bovine Dinâmica de anticorpos Título anticorpos Gestação Bovinos |
| Sumario: | Neospora caninum has been described as an important cause of abortion in bovine worldwide. The objective of the present study was to characterize patterns of antibody dynamics during gestation in dairy cows naturally infected with N. caninum. Twelve N. caninum naturally infected cows were selected from four dairy herds from Brazil and blood samples were monthly collected during pregnancy. Serum were tested for antibodies against N. caninum by Indirect Fluorescent Antibody Test (IFAT). During this period, all cows remained clinically normal and gave birth to healthy calves. The cows remained seropositives during the study and N. caninum IFAT titers ranged from 100 to 12,800; only animal 234 presented one negative result in the first month of pregnancy. Significant differences of N. caninum IFAT titers were found between months from 1 to 9 of pregnancy by the Friedman Test (P<0.001). The statistical analysis showed an increase of N. caninum antibody titers from second and third trimester of pregnancy in relation to first trimester. High titers were observed in few cows after month fifth of pregnancy. This study showed a variation of specific antibody levels in seropositive cows during different gestational periods. The highest values were observed during the second and third trimester. The antibody increase after the fifth month of gestation was not associated to abortion. |
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