CAT and Behcet disease: Plasma CAT activity, GSH and TAC levels were significantly lower in BD patients (39.86 ± 16.45, 19.33 ± 11.32 and 0.43 ± 0.17,respectivelly) as compared to controls (66.94 ± 33.37, 9.93 ± 2.79 and 1.02 ± 0.44 respectively, P < 0.001).