Effects of M. pneumoniae antigens on cytokine production by murine lymphocytes. Lymphocyte culture supernatant concentrations of (a) IL-17A (pg/ml), (b) IL-10 (pg/ml). Closed squares (■) show stimulation with 50 μg protein/ml of M. pneumoniae antigen. Closed triangles (▲) show saline control. *p < 0.05 vs. saline control by Student’s t-test.