In patients with meningitis, Positive correlation was found between NO index with CSF white blood cells (r = 0.319, p < 0.05); CSF-LPO with CSF-protein (r = 0.423, p < 0.01); NO and LPO indices (r = 0.318, p < 0.05); total thiol with LPO indices (r = 0.725, p < 0.0001); S-100B and PGCS (0.608, p < 0.0001); CSF-LPO with CSF-S-100B (r = 0.482, p < 0.002); serum-total thiol with serum S-100B (r = 0.423, p < 0.01). This evidence concerns the gene S100B and infectious meningitis.