*Relative Distribution was calculated after exclusion of 3.2% unclassified bacteria. **ND: non determined. Note: P value for chi-square test of the relative abundance distribution = 0.65. doi:10.1371/journal.pone.0022788.t001
*Relative Distribution was calculated after exclusion of 3.2% unclassifiedbacteria.**ND: non determined.Note: P value for chi-square test of the relative abundance distribution = 0.65.doi:10.1371/journal.pone.0022788.t001