CAT and gangrene: ‎In similar studies El- Deeb, reported the same in ‎milk of mastitic does and Li-Li and Qingzhang, in milk and mammary ‎tissue of goat with gangrenous mastitis showed ‎that the level of GPx, SOD and CAT ‎were ‎decreased significantly and the level of MDA was significantly ‎increased when compared to ‎control animals.30,31 On the other hand, Atroshi et al. in cows with mastitis and ‎kizil et al. in goat with ‎M.