Avaliação de desempenho e alterações histológicas em intestino delgado de cordeiros suplementados com Bacillus amyloliquefaciens

Abstract

The use of food probiotics has been a strategy to animal performance improvement and productivity increasing. Is such context, the objective of study was to evaluate the performance of Texel x Ile de France lambs supplemented with Bacillus amyloliquefaciens. Fourteen lambs were confined, aged 96-115 days and average weight of 31 kg. The animals were segregated in control group (GC) and Bacillus amyloliquefaciens supplemented group (GBA). The food for both groups was based on corn-grain (2,5% of live weight), soybean meal (1% of live weight) and barley straw. The B. amyloliquefaciens strain CCTB06 endospores were inoculated in the corn from the GBA group at a dose of 33 mL/kg (33 x 108 UFC/kg). Average weight gain, body condition score and carcass yield, as well as histological changes in the small intestine of lambs were evaluated. The GBA animals demonstrated higher weight gain during the evaluations, at slaughtering and carcass weight, in addition to greater epithelial integrity and development of intestinal villi. It was concluded that supplementation with Bacillus amyloliquefaciens improve the performance of the lambs.