In temperate countries maize grain intended for the human market should be free of mycotoxin contamination, and the by-products yielded by these processes are themselves of high quality (Blair, 2008). In tropical countries, maize bran may be highly contaminated with mycotoxins, particularly during the hot rainy season (Rava, 1996; Scudamore et al., 1998). In Tanzania, in a survey of maize bran intended for poultry feeding, 50% of the samples were positive to aflatoxin B1 and 20% had more than 20 ppb (parts-per-billion) of that toxin (Kajuna et al., 2013).
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