 There are no reported cases of konzo west of Cameroon.However another neurological disease called tropical ataxic neuropathy (TAN), occurs amongst older people in West Africa (including south-west Nigeria, and also Tanzania, Uganda, Kenya, West Indies and South India) and is probably due to long term intake of cyanogens from cassava at a lower level than that needed to cause konzo.The WHO has recommended three criteria for the diagnosis of konzo