The changes of 9 district genera in the gut microbiota composition. (A) Bacteroidetes (phylum), (B) Firmicutes (phylum), (C) Proteobacteria (phylum), (D) Bacteroidia (class), (E) Clostridia (class), (F) Gammaproteobacteria (class), (G) Bacteroidales (order), (H) Clostridiales (order), (I) Lachnospiraceae (family). Each mean represents 8 replicates, with 1 layer/replicate. Abbreviations: AP, average egg-laying rate; APE, AP + 6 × 108 cfu/kg Enterococcus faecium; LP, low egg-laying rate; LPE, LP + 6 × 108 cfu/kg E. faecium.