Aflatoxin contamination of dried yam chips marketed in Nigeria

Abstract

Dried yam chips from different markets in western Nigeria had pH 5.7–6.1 and moisture contents of 7.5–14.3%. Aspergillus was the predominant mould followed by Penicillium. From thin layer chromatography analysis, 54% of the chips were contaminated with aflatoxin B1 up to 186 (g/kg, 32% with aflatoxin B2 up to 55 (g/kg. Of the samples, 51% contained aflatoxin above the 20 ppb internationally accepted residue limit. Copyright © 2003 Whurr Publishers Ltd

Aflatoxin and fumonisin contamination of yam flour from markets in Nigeria

“…The AF presence is in agreement with previous surveys by Bankole and Adebanjo (2003), Bankole and Mabekoje (2004), and Jimoh and Kolapo (2008), who reported occurrence of AFs in yam chips in Nigeria, and by Bassa et al (2001) and Mestres et al (2004) who reported AFs in yam chips in Benin Republic.…”

“…Jimoh and Kolapo (2008) reported 14 mg kg À1 of AFB 1 and 17 mg kg À1 AFG 1 contamination in yam chips; Bankole and Adebanjo (2003) reported AFB 1 levels up to 186 mg kg À1 , while it was up to 30 mg kg À1 as reported by Bankole and Mabekoje (2004).…”

“…For example, Bankole and Adebanjo (2003) reported that 54% of yam chips obtained from markets in western Nigeria was contaminated with AFB 1 levels up 186 mg kg À1 and 32% with AFB 2 up to 55 mg kg À1 . Another study by Bankole and Mabekoje (2004) showed mean concentration of AFB 1 in contaminated samples to be 27.1 mg kg À1 .…”

Fungal contamination and aflatoxin B1 of ‘egusi’ melon seeds in Nigeria

“…In comparison to other Nigerian stored food products such as groundnut (McDonald & Harkness, 1964), maize (Bankole & Mabekoje, 2004) and dried yam chips (Bankole & Adebanjo, 2003a, 2003b, lower incidence and levels of aflatoxin occurred in melon seeds. This is rather surprising because A. flavus distinctly dominated other fungi on stored seeds in the present study and market melon seeds in previous reports (Aboaba & Amasike, 1991;Bankole, 1993).…”

Nigerian Indigenous Fermented Foods: Processes and Prospects

“…In a review, Bankole and Adebanjo (2003), found that the level of aflatoxin B1 , B2 and G1 were significantly higher in corn from the high incidence area for human hepatocellular carcinoma and the average daily intake of aflatoxin B1 from the high risk area was 184.1 g/kg aflatoxin. Udoh et al (2000) reported 33% of maize sample from ecological zones of Nigeria contaminated with aflatoxins.…”