Similarly, women with a history of Chlamydia infection (self-reported or noted in medical records; n = 21) more often had serum-IgG and mucosa-IgA and -IgG than those without such a history (serum-IgG: 81 versus 14%, P < 0.001; mucosa-IgA: 33 versus 1.7%, P < 0.001; mucosa-IgG: 67 versus 36%, P = 0.02). This evidence concerns the gene CD79A and chlamydia infectious disease.