CD79A and sexually transmitted disease: In this study, we compared (A) the correlation between the outcomes of the serum-IgG CAT and the mucosa-CAT in a group of women at risk for late complications (attending a fertility clinic) and (B) the correlation between the presence of Chlamydia DNA (PCR) in vaginal swabs and the outcomes of the serum-CAT and mucosa-CAT (IgG and IgA), in women at risk for a current infection (attending an STI clinic).