Changes in microbial diversity and populations in the caecal content, assessed by 454-pyrosequencing.

<p>Microbial diversity indexes (A). Principal component analysis based on the relative abundance distribution at the species level (B). Relative abundances of bacterial taxa accounting for more than 1%, at the phylum, family and genus levels (C). Relative abundances of the Bacteroidetes phylum, <i>Bacteroidaceae</i> family, <i>Bacteroides</i> genus and species-like <i>Bacteroides</i> HQ788586 (D). Data with different superscript letters are significantly different.