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Appl Environ Microbiol. 1975 October; 30(4): 581-583
Copyright © 1975 American Society for Microbiology. All Rights Reserved.

Production of Aflatoxins B₁ and G₁ by Aspergillus flavus and Aspergillus parasiticus Isolated from Market Pecans

^* Departments of Food Science and Plant Pathology, University of Georgia, Athens, Georgia 30602 and United States Department of Agriculture, Agriculture Research Service, Chicago, Illinois 60605

ABSTRACT

One hundred and forty-eight isolates of Aspergillus flavus and A. parasiticus were isolated from 5,608 pecans obtained from Chicago and Georgia markets. The percentage of internal contamination by these species was 7.3% in the Chicago market pecans and 1.7% in those from markets in Georgia. Of the 148 isolates, 93% of the A. parasiticus, but only 54% of the A. flavus, were capable of producing aflatoxin. Overall, 57% of the isolates were potentially aflatoxigenic. A. parasiticus isolates generally produced a greater amount of aflatoxins than A. flavus.