Aspergillus oryzae & flavus (image) Vanderbilt University Caption Aspergillus oryzae, on the left, has been genetically optimized to convert rice starch into sugars. Its wild cousin, Aspergillus flavus, on the right, is an agricultural pest that produces aflatoxin, a potent natural carcinogen. Credit John Gibbons, Vanderbilt University Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.