%0 Journal Article %T [Influence of the interaction of temperature and water activity on the production of ochratoxin A and the growth of Aspergillus niger, Aspergillus carbonarius and Aspergillus ochraceus on coffee-based culture medium]. %+ Laboratoire de Génie Chimique (LGC) %+ Equipe Génie des systèmes microbiens %+ Laboratoire de biochimie et sciences des aliments, Unité de formation et de recherche de biosciences %+ Institut Pasteur de Côte d'Ivoire %A Kouadio, Ahou Irène %A Lebrihi, Ahmed %A Agbo, Georges N' Zi %A Mathieu, Florence %A Pfohl-Leszkowicz, Annie %A Dosso, Mireille Bretin %< avec comité de lecture %@ 0008-4166 %J Canadian Journal of Microbiology %I NRC Research Press %V 53 %N 7 %P 852-9 %8 2007-07 %D 2007 %R 10.1139/W06-143 %M 17898840 %K Café %K activité de l'eau %K Aspergillus %K ochratoxine A %Z Life Sciences [q-bio]/Microbiology and Parasitology/BacteriologyJournal articles %X In the present study, the effect of temperature and water activity on fungal growth and ochratoxin production on coffee-based medium was assessed. Optimal growth of three Aspergillus strains was observed in the same ecological conditions, namely 30 degrees C and 0.99 water activity. Maximal daily growth is 11.2, 6.92, and 7.22 mm/day for Aspergillus niger, Aspergillus carbonarius, and Aspergillus ochraceus, respectively. However, ecological conditions for optimal ochratoxin production vary according to the toxinogenic strain, with water activity as a limiting factor. Such an ochratoxin A production is inhibited at 42 degrees C and 0.75 water activity. Correspondence between laboratory tested water activity and that measured on a sun-dried ripe cherry batch shows that the first 5 days of drying are critical for fungal growth and ochratoxin A production. Accordingly, artificial drying of cherries at temperatures above 42 degrees C will impede not only fungal growth but also contamination with ochratoxin A. %G French %2 https://riip.hal.science/pasteur-00761245/document %2 https://riip.hal.science/pasteur-00761245/file/INFLUENCE_DOSSO.pdf %L pasteur-00761245 %U https://riip.hal.science/pasteur-00761245 %~ RIIP %~ UNIV-TLSE3 %~ CNRS %~ ENSA-TOULOUSE %~ RIIP_COTEDIVOIRE %~ AGREENIUM %~ LGC %~ TOULOUSE-INP %~ UNIV-UT3 %~ UT3-INP %~ UT3-TOULOUSEINP