CD79A and colorectal carcinoma: To investigate the association between serum levels of IgA and IgG antibodies and the amount of F. nucleatum DNA within the tissue, cases (13 CRC and 26 P-BCD) with detectable F. nucleatum DNA were categorized as low (< 50 percentile) versus high (≥ 50 percentile) based on the median cut point amount of F. nucleatum DNA, while cases without detectable F. nucleatum were categorized as negative.