Microbiota composition in stool samples. After transplantation, animals received feed pellets with hen antibodies (IgY) or control pellets (without IgY). The microbiota composition was determined in stool samples using a new generation sequencing method. (A) Microbiome composition on day 15 after transplantation. (B) Microbiome composition of allogeneic mice on days 15 and 28 after transplantation. Data are presented as mean ± SEM; *P < .05, **P < .01. Act, Actinobacteria; Bact, Bacteroidetes; Firm, Firmicutes; u. bac, uncultured bacteria.