Mananoligossacarídeo e colistina na dieta de leitões desmamados

Abstract

The objective of this trial was to evaluate the effects of prebiotic, antimicrobial, or association of both promoters in piglets diet upon performance, intestinal histomorfometry, and total IgA and IgG serum levels, in each treatment. The experiment was carried out in commercial pig farm, one-site production, using a hundred weaned castrated males, hybrid piglets, from 21 to 63 days of age, distributed in 4 traits with 5 repetitions: T1 = basal feed + antimicrobial as conventional growth promoter (colistin sulphate, 40 ppm); T2 = basal feed without any growth promoter; T3 = T1 + Bio- MosÒ prebiotic; T4 = T2 + Bio-MosÒ prebiotic. Pieces of intestine were sampled on last day of the trial. There were no differences on performance. The duodenal absorptive mucosa surface was higher in piglets treated with prebiotic and the use of prebiotic by long term post-weaning enhanced immunostimulation. Blood samples were collected on days 0, 14 and 42 days post weaning to measure total IgA and IgG by ELISA test. Fragments of tissue for histomorfometry were collected at slaughter, when piglets were at 63 days of age. It was concluded that there were no differences on nursery piglets performance using prebiotic, antimicrobial, or association of both promoters; the small intestine absorptive surface was higher in piglets treated with prebiotic, and when associated to antimicrobial promoter, was able to increase the levels of total serum IgA at 42 days post weaning, while total serum IgG levels were higher in piglets which didn´t receive any growth promoter in this high health challenge pig farm.