GSTM1 and infection: Infections with Trypanosoma evansi (surra) similarly result in anemia with reduced RBCs, Hb, and HCT, alongside lymphocytopenia, monocytopenia, eosinopenia, and decreased antioxidant enzyme activities such as glutathione (GSH), superoxide dismutase (SOD), catalase (CAT), and total antioxidant capacity (TAC) [25,47].