MMP9 and meningeal tuberculosis: Densitometric analysis revealed MMP-9 levels of 5.67 ± 2.45 ng/ml for controls, 830.66 ± 83.07 ng/ml for stage I, 1202.55 ± 136.81 ng/ml for stage II and 1679 ± 277.4 ng/ml for stage III TBM patients (Fig. 3b).