Screening of fermentative bacteria for their ability to bind and biotransform deoxynivalenol, zearalenone and fumonisins in an in vitro model simulating corn silage
Résumé
Fermentative bacteria can potentially be utilized to detoxify corn silages contaminated by Fusarium toxins. The objective of the present study was to test a large number of these bacteria for their ability to bind and/or biotransform deoxynivalenol (DON), zearalenone (ZEN), and fumonisins B1 and B2 (FB1, FB2) in conditions simulating corn silage. A total of 202 strains were screened in contaminated, pH 4, corn infusion inoculated with 5 × 108 CFU ml-1. Eight Lactobacilli and three Leuconostoc biotransformed ZEN into α zearalenol, but no biotransformation was detected for DON and fumonisins. In contrast, most strains were capable to bind Fusarium toxins. The most effective genera were Streptococcus and Enterococcus capable to bind up to 33%, 49%, 24% and 62% of DON, ZEN, FB1 and FB2, respectively. The ability to bind Fusarium toxins seems to be a common property of fermentative bacteria and could contribute to decrease their toxicity in animals.
Domaines
Microbiologie et Parasitologie
Origine : Fichiers produits par l'(les) auteur(s)
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