de Toranzo E G, Masana M, Castro J A
Res Commun Chem Pathol Pharmacol. 1983 Aug;41(2):341-4.
Rat and human feces are able to reduce nitro group from Benznidazole (N-benzyl-2-nitro-1-imidazole acetamide) and Nifurtimox (4[5-nitrofurfurylidene)-amino)-3-methylthiomorpholine-1,1-dioxide), two chemotherapeutic agents against Chagas' disease. Feces from rats treated with neomycin sulfate lack nitroreductase activity evidencing the bacterial origin of the enzyme.