ARAF and colorectal carcinoma: Bacteria such as Fusobacterium nucleatum, Bacteroides fragilis, and pks+E. coli found in the intestine are involved in promoting CRC, while others like Streptococcus thermophilus, Streptococcus salivarius, Clostridium butyricum, Lactobacillus gallinarum, and Lactobacillus paracasei are considered to inhibit CRC (181–183).