RESUMEN
The aims of the current study were to assess the inclusion levels of grape byproduct replacing jiggs hay in lambs diets and to evaluate signs of copper poisoning. Thirty-four Texel and Corriedale crossbred female lambs were used in a randomized block experimental design. The treatments comprised four levels of grape byproduct (0; 100; 200 and 300â¯g/kg DM) in replacement of jiggs hay. The diets were adjusted to the same ZnCu ratio (6:1) of the basal diet. Grape byproduct consumption at up to 30%, led to similar weight gain in the different treatments (Pâ¯=â¯.92), which was suitable for growing lambs. Grape byproduct in the diet had linear effect on GGT (Pâ¯<â¯.001) and AST (Pâ¯<â¯.0001) enzymes as well as on total bilirubin (Pâ¯=â¯.05). In addition, the highest grape byproduct addition showed the highest consumption of hay (Pâ¯<â¯.01). Hay replacement by grape byproduct at up to 300â¯g/kg in the DM was satisfactory to weight gain and did not negatively affect feed intake and weight gain of growing lambs. Maintaining zinc:copper ratio in sheep diets is not effective in preventing liver damage caused by increased dietary copper concentrations over a period of 70â¯days.
Asunto(s)
Cobre/envenenamiento , Intoxicación por Metales Pesados/veterinaria , Oveja Doméstica/fisiología , Vitis/química , Zinc/metabolismo , Alimentación Animal/análisis , Fenómenos Fisiológicos Nutricionales de los Animales , Animales , Dieta/veterinaria , Suplementos Dietéticos/análisis , Femenino , Intoxicación por Metales Pesados/prevención & control , Zinc/administración & dosificaciónRESUMEN
A lavage procedure was developed to obtain intestinal secretions from rabbits. The procedure facilitated the repeated monitoring of the intestinal IgA immune response of these animals to enteric infection with Campylobacter jejuni. This non-invasive technique was easily performed, reproducible and yielded consistent levels of IgA from rabbit intestinal secretions. It is anticipated that this procedure will aid in the study of the intestinal immune response of rabbits to other enteric pathogens.