While mean gene abundance for each b-gus and gdh was similar in both groups, we observed that the proportion of contributing bacterial taxa differed in regard to b-gus and gdh. Relative abundance of Bacteroidetes b-gus increased in CRC, and Bacteroidetes were reported to mostly carry the BG-type of B-GUS [27, 40]. The gene discussed is PPIB; the disease is colorectal carcinoma.