Distribution and gene mutation of enteric flora carrying β-glucuronidase among patients with colorectal cancer.

Objective: To explore the difference of distribution in intestinal flora among colorectal cancer patients and healthy controls and investigate characteristics and changes of sequences in beta-glucuronidase (β-glucuronidase, β-G).

Methods: Bacterial genomic DNA and E. coli DNA in feces were extracted from colorectal cancer patients and healthy controls respectively.