Prediction of fungal growth and ochratoxin A production by Aspergillus ochraceus on irradiated barley grain as influenced by temperature and water activity

International Journal of Food Microbiology
E PardoA J Ramos

Abstract

Ochratoxin A (OTA) is a secondary metabolite of Aspergillus and Penicillium species, including Aspergillus ochraceus, a species that can be found in stored cereal grains such as barley. The objective of this study was to determine the effects of water activity (a(w), 0.80-0.99), temperature (10, 20, 30 degrees C), and A. ochraceus isolate differences on radial growth and OTA production in irradiated barley grains. The three isolates showed optimal conditions for growth and ochratoxin A production at 0.99 a(w) and 30 degrees C, with a marked decrease of growth rates and OTA production at the lowest levels of a(w) and temperature assayed. The minimum a(w) level for growth, observed in this study, was 0.85 and 0.90 a(w) for OTA production. Significant differences among the isolates were found. Lag phases prior to fungal growth and OTA production values were modelled by multiple linear regression and response surface models. These models could provide an approximate prediction of growth and OTA production.

References

May 1, 1991·International Journal of Food Microbiology·N RamakrishnaJ E Smith
Dec 1, 1988·International Journal of Food Microbiology·N Magan, J Lacey
Oct 1, 1973·Canadian Journal of Microbiology·G A SansingU L Diener
Mar 13, 1965·Nature·K J van der MerweJ J Theron
Feb 21, 1981·Journal of Theoretical Biology·R M SchoolfieldC E Magnuson
Nov 1, 1994·International Journal of Food Microbiology·A M GibsonT A Roberts
Jan 1, 1996·Food Additives and Contaminants·P M BolgerC D Carrington

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Citations

Apr 25, 2013·International Journal of Food Microbiology·Romina S CanelVanesa Ludemann
Sep 20, 2011·International Journal of Food Microbiology·Daiana GarciaSonia Marín
Aug 17, 2011·Environmental Toxicology and Pharmacology·Mohammadreza Khalesi, Neda Khatib
Oct 20, 2009·Food Microbiology·Daiana GarciaSonia Marín
Mar 10, 2009·International Journal of Food Microbiology·Noureddine BourasStephen E Strelkov
Nov 23, 2007·International Journal of Food Microbiology·Philippe Dantigny, Maurice Bensoussan
Sep 29, 2007·International Journal of Food Microbiology·Katleen BaertBruno De Meulenaer
Nov 13, 2007·Food Microbiology·Katleen BaertBruno De Meulenaer
Nov 6, 2015·International Journal of Food Microbiology·Antonia GalloGiancarlo Perrone
Aug 21, 2012·Journal of the Science of Food and Agriculture·Jolanta WawrzyniakMarzena Gawrysiak-Witulska
Dec 1, 2005·International Journal of Food Microbiology·L GonzálezJ Mañes
Apr 13, 2011·Environment International·Jonathon TaylorPhillip Biddulph
Nov 10, 2013·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·J Wawrzyniak, A Waśkiewicz
Feb 27, 2014·Journal of Industrial Microbiology & Biotechnology·István WeydaPeter S Lübeck
Oct 6, 2018·Environmental Microbiology·L NervaM Turina
Aug 30, 2008·Journal of Food Protection·Susan Rouse, Douwe van Sinderen
Feb 2, 2006·Journal of Agricultural and Food Chemistry·Marjatta VahvaselkäSimo Laakso
May 6, 2021·Animals : an Open Access Journal From MDPI·Daniel Dooyum UyehYushin Ha

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