CAT and tuberculosis: Onegroup of authors in India evaluated the circulating concentrations of antioxidantenzymes that have selenium as an essential component and are markers of oxidative stressin patients with pulmonary tuberculosis.(29) The results showed lower antioxidant potential as determined by low levelsof superoxide dismutase, catalase, and glutathione, as well as increased lipidperoxidation (malonaldehyde), in the patients with tuberculosis.