Oxidative Stress/drug effects; Polyamines/pharmacology; Trypanosoma brucei brucei/drug effects; Trypanosomiasis, African/parasitology; Amide Synthases/genetics; Amide Synthases/metabolism; Animals; Culture Media; Eflornithine/pharmacology; Enzyme Inhibitors/pharmacology; Gene Expression Regulation, Enzymologic/drug effects; Glutathione/analogs & derivatives; Glutathione/metabolism; Hematocrit; Hydrogen Peroxide/metabolism; Male; NADH, NADPH Oxidoreductases/genetics; NADH, NADPH Oxidoreductases/metabolism; Ornithine Decarboxylase/genetics; Ornithine Decarboxylase/metabolism; Ornithine Decarboxylase Inhibitors; Polyamines/metabolism; Putrescine/blood; RNA, Messenger/metabolism; Rats; Rats, Wistar; Spermidine/analogs & derivatives; Spermidine/analysis; Spermidine/blood; Spermidine/metabolism; Spermine/blood; Trypanosoma brucei brucei/growth & development; Trypanosoma brucei brucei/metabolism; Trypanosomiasis, African/drug therapy