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Con el fin de determinar la presencia de bovinos con anticuerpos al parasito Neospora caninum se realizo un estudio en la hacienda San Pedro. Fredonia, Antioquia y para ello se tomaron muestras de sangre sin anticoagulante a 298 animales de la raza holstein y a 49 de la raza Brangus; las cuales se procesaron con la tecnica de ELISA en el laboratorio del Instituto Colombiano de Medicina Tropical. El total de animales con presencia de anticuerpos para IgG contra Neospora fue 120, lo cual correspondio a una prevalencia de 34,6%. En el ganado Holstein el numero de positivos fue 119 para una prevalencia de 39,9%. De los 50 animales Brangus estudiados solo uno resulto positivo, para una prevalencia de 2,0%. Debido a los resultados se considero que se debe tener un control apropiado en la finca, especialmente la presencia de los caninos por ser los hospederos definitivos del parasito y evitar asi las considerables perdidas economicas que hasta la fecha se han presentado. Abstract The neosporosis is a parasitic sickness produced by Neospora Caninum (apicomplexa: coccidia), a protozoal characterized by causing sub fertility early damage of pregnancy, mummification, abort and born calfs with ataxia and paralysis. With the hope of determine the presence of bovines with antibodies of the parasite Neospora Caninum a study was made in San Pedro faro, in Fredonia Town (Antioquia, Department). For this purpose, some blood samples were taken whitout anticoagulant of 296 animals of Holstein breed and of 49 Brangus breed; then was made a process with ELISA technique in the laboratory of the Colombian Institute of Tropical Medicine. The totality number of animals with the antibodies presence of IgG against Neospora was 120, which corresponds to a prevalence of 34.6%. In the Holstein Livestock the numbers of positive was 119 for a prevalence of 39.9%. Of the 49 Brangus animals in the study, only one had positive result, for a prevalence of 2.0%. Because of the results it was considered that there must be an appropriate control in the faro, exactly the presence on canines because they are the animals that carry the parasites and avoid the considerable economics damages that had occurred since today.

ESTUDIO PARA EVIDENCIAR LA PRESENCIA DE Neospora caninum EN BOVINOS DE LA HACIENDA SAN PEDRO EN EL MUNICIPIO DE FREDONIA.