Author
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Klich, Maren |
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Submitted to: Inoculum
Publication Type: Abstract Only Publication Acceptance Date: 3/17/2005 Publication Date: 8/1/2005 Citation: Klich, M.A. 2005. Aflatoxin Production and Long-Term Survival of Aspergillus flavus. Inoculum. 56(4):32-33. Interpretive Summary: Technical Abstract: Eight strains of Aspergillus flavus varying in aflatoxin production were inoculated onto YES and PDA agar media and incubated at 37 degrees C. A. flavus generally produces more aflatoxin on YES than on PDA. All four of the high-producing isolates survived for at least 2.5 years on YES, whereas only one of the isolates on PDA survived over 2.5 years. Only one of the four low/non-producing isolates survived 2.5 years, and that was on YES. The study included high and low aflatoxin-producing strains derived from one isolate. Of these, only the high-producing substrain on YES survived 2.5 years. In a second experiment, two sets of the eight isolates were incubated grown on YES at 25 degrees C for two weeks and then one set was in a 47 degrees C incubator. All of the isolates incubated at 25 degrees C were viable after 1.5 years, but only two of the strains survived 1.5 years at 47 degrees C. Both of these were high-producing strains. Presence of high levels of aflatoxin is associated with long-term survival of A. flavus. |
