In this context, here we investigated potential PLTB biomarkers, validating and/or evaluating the accuracy of dosing IgA and IgG response to mycobacterial single Ags MT10.3, MPT64 and PPE59, fusion proteins MT10.3:MPT64 and the novel F2, in PF and sera from patients with pleural effusion using an in-house ELISA method. The gene discussed is CD79A; the disease is Pleural effusion.