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Percentages of lymphocyte cell subsets CD4+ (a) and CD8+ (b) expressing CD25 of PBMCs from animals inoculated with either MbΔmce2 (n = 4, triangle) or NCTC 10772 (n = 3, circle) stimulated with PPDB (black) or PBS (white) at different time points. Data were analyzed using the Wilcoxon matched pair test for cells with and without PPDB stimulation (*statistically significant P < 0.05 and **statistically significant P < 0.01). The means ± SEM are indicated.
