https://pmc.ncbi.nlm.nih.gov/articles/PMC6407708/
The human gut bacterial genotoxin colibactin alkylates DNA - PMC
Certain Escherichia coli strains residing in the human gut produce colibactin, a small molecule genotoxin implicated in colorectal cancer pathogenesis....
the humangutbacterialgenotoxincolibactin