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. 1991 Nov-Dec;8(6):731-6.
doi: 10.1080/02652039109374031.

Interaction of water activity and temperature on aflatoxin production by Aspergillus flavus and A. parasiticus in irradiated maize seeds

M K Faraj  1 , J E Smith, G Harran
Affiliations

Interaction of water activity and temperature on aflatoxin production by Aspergillus flavus and A. parasiticus in irradiated maize seeds

M K Faraj et al. Food Addit Contam. 1991 Nov-Dec.

Abstract

The effects of aw (0.90, 0.95, 0.98) and temperature (25 degrees C, 30 degrees C, 35 degrees C) on aflatoxin production by Aspergillus flavus and Aspergillus parasiticus growing on irradiated maize seeds, were examined. Highest levels of aflatoxin were produced by A. parasitious at 25 degrees C and 0.98 aw and by A. flavus at 30 degrees C at 0.95 and 0.98 aw. At 0.90 aw toxin production was consistently low for both species at all temperatures. Temperature cycling of A. flavus between 25 degrees C and 35 degrees C each for 12 h resulted in higher aflatoxin synthesis than when incubated either at 25 degrees C or 35 degrees C.

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