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Principal coordinate analysis plot of the cecum microbiota based on the unweighed UniFrac metric. 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.
