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Updated: Jun 19, 2026

Staphylococcus aureus Growth using Human Hemoglobin as an Iron Source
Published on: February 7, 2013
A NEW GROWTH FACTOR REQUIRED BY CERTAIN HEMOLYTIC STREPTOCOCCI
1Laboratories of The Rockefeller Institute for Medical Research.
Abstract:
A new factor essential for the growth of hemolytic streptococci of Lancefield's group A has been demonstrated. It has not been possible to identify this factor with any other known growth factor. The active substance occurred in liver as a water-soluble, alcohol-insoluble, non-dialyzable material. It could be rendered dialyzable by treatment in strong alcohol with HCl, but not by many less drastic procedures. The most active concentrates prepared gave a maximal effect when approximately 10 gamma per cc. were added.
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