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Maize, which contributes to a large portion of the African diet and serves as the base substrate for many fermented cereal products, has been reported to be contaminated with fumonisins. This study aimed to evaluate the in vitro ability of predominant lactic acid bacteria (LAB) in African traditional fermented maize based foods (ogi and mahewu) to bind fumonisin B1 (FB1) and B2 (FB2), as well as the stability of the complex at different pH and temperatures, in particular observed during ogi fermentation and under its storage conditions (time, temperature). The percentage of bound fumonisins was calculated after analysing the level of fumonisins not bound to LAB after a certain incubation time, by HPLC. The results revealed the ability of all tested LAB strains to bind both fumonisins, with binding efficiencies varying between strains and higher for FB2. Binding of fumonisins increased with a decrease in pH from 6 to 4 (observed during the ogi fermentation process) and from 4 to 2 (acidic pH in the stomach...

Potential of lactic acid bacteria for the reduction of fumonisin exposure in African fermented maize based foods