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Appl Environ Microbiol. 1968 June; 16(6): 819-821
Copyright © 1968 American Society for Microbiology. All Rights Reserved.

Investigation of Reported Aflatoxin Production by Fungi Outside the Aspergillus flavus Group

Division of Toxicology, Vanderbilt University School of Medicine, Nashville, Tennessee 37203
Department of Biochemistry and Nutrition, Virginia Polytechnic Institute College of Agriculture, Blacksburg, Virginia 24061
Department of Plant Pathology and Plant Genetics, University of Georgia College of Agriculture, Athens, Georgia 30601

ABSTRACT

A screening study of 121 fungus isolates, representing 29 species, for aflatoxin synthesis demonstrated this property only in Aspergillus flavus and A. parasiticus. Eight of the organisms found negative were isolates reported by other investigators to produce aflatoxin. Since similar negative reports have come from several other workers, it is concluded that only the A. flavus group of Aspergillus can presently be certified as sources of these toxins. Reasons for possible false-positive findings are discussed along with precautionary measures and differential analytical procedures useful in aflatoxin screening studies.