Fig. 3

Bacteria linked to CRC are known as CRC-associated bacteria, such as Bacteroides fragilis, Escherichia coli, Enterococcus faecalis and Streptococcus gallolyticus, which are individually linked to CRC. Strains of Fusobacterium nucleatum, Parvimonas, Peptostreptococcus, Porphyromonas and Prevotella have increased abundance in faecal and tumour samples from patients with CRC