Mounjouenpou Pauline, Gueule Dominique, Fontana-Tachon Angélique, Guyot Bernard, Tondje Pierre R., Guiraud Joseph-Pierre. 2008. Filamentous fungi producing ochratoxin a during cocoa processing in Cameroon. International Journal of Food Microbiology, 121 (2) : 234-241.
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Résumé : Ochratoxin A (OTA) is the main mycotoxin occurring in cocoa. A study was conducted in Cameroon to assess how filamentous fungi and toxigenesis were affected by the type of cocoa post-harvest treatment (boxes or heaps). The filamentous fungi isolated were almost identical when fermentation was carried out in boxes or heaps, with the presence of abundant black Aspergillus filamentous fungi: A. niger and A. carbonarius. Filamentous fungi were more abundant at the end of the harvesting season. Factors affecting bean integrity (poor handling, deferred processing) resulted in a qualitative and quantitative increase in contamination, when the total number of filamentous fungi could reach a maximum value of 5.5 ± 1.4 × 107 CFU g- 1 and black Aspergilli a maximum value of 1.42 ± 2.2 × 107 CFU g- 1. A toxigenesis study showed that Aspergillus carbonarius was the main OTA-producing strain isolated. Its maximum production could reach 2.77 ?g g- 1 on rice medium. Aspergillus niger strains did not always produce OTA and their toxigenesis was much lower. Fermented dried cocoa from poor quality pods was the most contaminated by OTA: up to 48 ng g- 1.
Mots-clés Agrovoc : ochratoxine, fève de cacao, Aspergillus niger, Aspergillus, technologie alimentaire, qualité, contamination biologique, fermentation
Mots-clés géographiques Agrovoc : Cameroun
Mots-clés complémentaires : Aspergillus carbonarius
Classification Agris : Q03 - Contamination et toxicologie alimentaires
Q02 - Traitement et conservation des produits alimentaires
Champ stratégique Cirad : Axe 3 (2005-2013) - Alimentation accessible et de qualité
Auteurs et affiliations
- Mounjouenpou Pauline, IRAD (CMR)
- Gueule Dominique, CIRAD-PERSYST-UMR Qualisud (FRA)
- Fontana-Tachon Angélique, CIRAD-PERSYST-UMR Qualisud (FRA)
- Guyot Bernard, CIRAD-PERSYST-UMR Qualisud (FRA)
- Tondje Pierre R., IRAD (CMR)
- Guiraud Joseph-Pierre
Autres liens de la publication
Source : Cirad - Agritrop (https://agritrop.cirad.fr/543682/)
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