Caracterização molecular da microbiota e morfologia intestinal da tilápia-do-Nilo (Oreochromis niloticus) após suplementação dietética com mananoligossacarídeo (MOS)

The intensification of tilapia production caused bacterial diseases frequent especially for high density storage and stressful handling. This scene brings unbridled and indiscriminate use of antimicrobials, producing a final product with dubious quality and damage to the environment. A promising alternative to prevent diseases in fish farming is the use of mannan oligosaccharide (MOS) in fish diet, which promotes the adsorption of pathogens in the intestine, improving the health of the animal. The aim of this study was to evaluate the use of mannan oligosaccharide in the characterization of the microbiota and intestinal morphology of Nile tilapia for 45 days of feeding. After seven days of mannan oligosaccharide supplementation, fish fed with diet containing 2 g kg-1 of the supplement had the lowest number of total aerobic bacteria (p 0.05), while the greater thickness of villi was observed in the fish diet with 8 g kg-1 mannan oligosaccharide in the same feeding period, however the villi width in period of 45 days in diet supplemented with 8 g Kg-1 mannan oligosaccharide it was significance in relation to control (p0,05), enquanto a maior espessura das vilosidades foi observada nos peixes alimentados com 8 g kg-1 de mananoligossacarídeo, no mesmo período de alimentação, porém a largura das ..