Among the dominant genera, Leuconostoc, Bacillus and Atopostipes of Bacilli class (Firmicutes), Peptoniphilus and Ruminococcaceae_uc of Clostridia class (Firmicutes), Bacteroides of Bacteroidia class (Bacteroidetes), and Pseudomonas of Proteobacteria class (Proteobacteria) were lower (p