CD79A and colorectal carcinoma: At present, available studies include: the analysis of Clostridioides difficile's anti-tcdB antibody, which revealed a significantly higher number of preoperative CRC cases who were positive for the anti-tcdB IgG and IgA antibodies compared with their healthy controls [14]; and a study on the Fap2 protein of Fusobacterium nucleatum, which showed that most of the CRC cases were reactive to the synthetic mimotope of Fap2 protein [18].