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Black aspergilli and ochratoxin A production in French vineyards

Bejaoui, Hend and Mathieu, Florence and Taillandier, Patricia and Lebrihi, Ahmed Black aspergilli and ochratoxin A production in French vineyards. (2006) International Journal of Food Microbiology, vol. 1 . S46 -S52. ISSN 0168-1605

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Official URL: http://dx.doi.org/10.1016/j.ijfoodmicro.2006.03.004

Abstract

A survey on the occurrence on grape of black Aspergillus species and their capability to produce ochratoxin A (OTA) was conducted in France over three years (2001–2003) in 10 vineyards from four winemaking regions with different geographical locations and climatic conditions. During 2001 and 2002, from setting to harvest, the total numbers of fungal isolates were respectively 721 and 711 increasing in 2003 to reach 1035. The Aspergillus genus was essentially represented by Section Nigri (99%) and it was predominant (80%±4.6) when compared to Penicillium (20%±4.6). Regardless of sampling year, 32.5% (±σ=1.26) of the fungal isolates were OTA producers and 93% (±σ=2.65) belonging to black aspergilli. The ochratoxigenic potential of the isolates and their occurrence on grapes revealed that Aspergillus carbonarius was the main OTA producer (up to 37.5 μg/g). At harvest time, the fungal population was maximal and this was the most critical period influencing OTA contamination. Grapes from Languedoc-Roussillon region were most infested with ochratoxigenic fungi and had the highest concentrations of OTA (up to 2.8 ng/g).

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at International Journal of Food Microbiology website : http://www.sciencedirect.com/science/journal/01681605
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
Laboratoire de Génie Chimique - LGC (Toulouse, France) - Bioprocédés et systèmes microbiens (BioSyM)
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Deposited By: Hélène Dubernard

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