ABSTRACT
Objetivo. Evaluar la frecuencia de anticuerpos anti-N. caninum en dos rebaños de ovinos del departamento de Córdoba-Colombia. Materiales y métodos. El estudio fue realizado en el departamento de Córdoba (Colombia) en dos explotaciones de ovinos que presentaron antecedentes de abortos y muerte de animales adultos. Se muestrearon 28 hembras adultas de pelo criollo (Camura), escogidas por muestreo aleatorio simple. Un péptido recombinante de Neospora caninum (NcGRA1) fue utilizado para el diagnóstico por DOT-ELISA y el suero fue diluido en 1:200. Resultados. Este estudio reporta por primera vez para el departamento y para el país la presencia de anticuerpos anti-N. caninum en el 78.6% (22/28) de los ovinos muestreados. Conclusiones. Estos resultados confirman la infección por Neospora caninum en ovinos y la necesidad de nuevos estudios que asocien la presencia del parasito con manifestaciones clínicas en diferentes regiones del país.
Objective. To investigate the effects of supplements with protected fat such as calcium soaps containing omega 3 or 6 milk production, composition and reproductive performance. Materials and methods. Twenty-four Holstein cows were used in a mixed model design. From 20 days before calving until 105 days postpartum, cows were assigned to different treatments; C: control diet, O6: animals supplemented with protected unsaturated fat including a higher amount of omega, 6 and O3: animals fed with protected unsaturated fat including higher amounts of omega 3. Milk volume and composition, and body condition score (CC) were determined, along with the first postpartum heat and ovulation. Results. Supplementation with omega 3 or 6 had no effect on milk volume, and fat percentages, protein, milk non-fat solids (SNF) and total solids (ST). However, there is a positive effect of omega 6 supplementation on the CC at 45 days postpartum (p<0.05). This was also reflected in a faster ovarian recovery (42.24±16.75 days to first postpartum ovulation). Conclusions. The use of omega 6 supplementation improves body condition score of animals during early postpartum, decreasing the days to the first ovulation and postpartum heat without affecting the volume or composition of the milk. Supplementation with omega 3 does not affect any productive parameters in the early postpartum.