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Two women examining agar plates in the Northern Regional Research lab

 Image Number D4750-1

Mary Hunt, believed to be on the left, with a fellow worker inside Peoria's USDA Northern Regional Research Laboratory, ca. 1943. They are examining agar plates of bacteria exposed to penicillin as part of a worldwide survey effort to find Penicillium mold strains that produced the highest amounts of the antibiotic.


Photo by USDA.

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