(56) measured the relative abundance of Fn, Faecalibacterium prausnitzii (Fp), Bifidobacterium (Bb), and Lactobacillus (Lb) in stool samples from 2 cohorts of 903 individuals and found that the ratio of the abundance of Fn, Bb and Clostridium prazines can be used to predict CRC with a sensitivity of 90%. This evidence concerns the gene FN1 and colorectal carcinoma.