Fungal microflora and ochratoxin a risk in French vineyards

Journal of Agricultural and Food Chemistry
Lucile SageFrançoise Seigle-Murandi

Abstract

To evaluate the ochratoxin A risk in French vineyards, five winemaking regions were investigated. An exhaustive survey of the fungal microflora of 60 grape samples was carried out at two development stages of the berries: end of veraison and harvest time. Potentially toxinogenic fungi isolated from grapes were assessed in vitro for ochratoxin A production. Ochratoxin A was also quantified in musts by high-performance liquid chromatography after cleanup on immunoaffinity columns. Among the 90 species identified, almost half are listed as mycotoxin producers, but only 2 are potentially ochratoxinogenic: Aspergillus carbonarius and Aspergillus niger. Among these strains, only A. carbonarius, isolated from the Languedoc region at harvest time, was found to produce ochratoxin A. These results were in accordance with the presence of ochratoxin A in French southern region musts (0.01-0.43 microg/L) and confirmed the major implication of A. carbonarius in ochratoxin A contamination.

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Citations

Dec 3, 2013·Food Microbiology·Sandrine RousseauxMichèle Guilloux-Bénatier
Jul 19, 2013·International Journal of Food Microbiology·A MorettiR H Proctor
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