Aflatoxin and fumonisin contamination of yam flour from markets in Nigeria

► We analysed yam flour for aflatoxin and fumonisin. ► Aflatoxin and fumonisin was detected in yam flour at low concentration. ► There was co-occurrence of aflatoxin and fumonisin in yam flour. ► Aflatoxin level was reduced during the processing of yam flour to yam flour paste “amala”. ► Ochratoxin A, zearalenone and deoxynivalenol were not found in the limited samples analysed.