CONICET | Buscador de Institutos y Recursos Humanos

The objective of this work was to know the association of seroprevalence to Neospora caninum in buffaloes (Bubalus bubalis) by age and bread in establishments of argentinean northeastern. Neospora caninum is a protozoan responsible for reproductive losses in bovine around the world been found presence in herds for meat and milk of the country. The exploitation of the buffalo in our country has increased in the latest years estimated its population in approximately 100.000 animals located mainly in the provinces of the argentinean northeastern. For the next study were sampled 3 establishments in the province of Corrientes and 2 in the province of Chaco, in total 1693 females of breads Mediterranean, Murrah and Jafarabadi from 2 to 20 years old. The blood samples were obtained by puncture of the jugular vein, sera obtained were processed using the technique of indirect inmunofluorescence (IFI) for detection of antibodies of N. Caninum for serum dilutions, considering as criterion of positivity a title of 1:100. Were used control será positive and negative at the time of microscopic evaluation. Were positive the 41% (694/1693) of the animals, these were divided into four groups by age, 8 years. The analice were releated by a logistic association, the odds ratio (OR) calculed the association between the disease and a factor exposition, assosiating the positives results for age (OR: 1,15; CI 95%: 1,05? 1,26) and bread (OR: 0,89; CI 95%: 0,72- 1,10). The possibility that the animals are seropositives increased by 15% every 2 years in this study, about bread no differences were founded. All the establishments presented seropositive animals and we see that the buffaloes are highly exposed to N. Caninum in the fields of argentinean northeastern and that the age is a important contributing factor at the serologic status to N. Caninum

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