Autochthonous probiotic bacteria modulate intestinal microbiota of Pirarucu, Arapaima gigas

This study aimed to investigate the ability of two probiotic strains ( Lactococcus lactis subsp. lactis and Enterococcus faecium ) to colonize Arapaima gigas intestines and their competence in modulating gut microbiota, morphology, and immunological status. A total of 135 A. gigas (58.86 ± 10.25 g) were divided into three treatments: (a) fish fed a diet containing L. lactis subsp. lactis at 1 × 10 8 CFU −1 , (b) fish fed a diet containing E....