But it is not just maize that is often contaminated with the poisonous substance. In East Africa, maize, milk and groundnuts are the main sources of aflatoxin exposure. These are commonly mixed together to make a porridge for infants and children, putting them at particular risk of aflatoxin poisoning.For Kenya, aflatoxin contamination is a long-standing problem. The country is considered a world hotspot, with incidents of acute toxicity recorded in 2004 and 2010.