Abstract
Summary
A comparative study was made of intermedius-type strains of C. diphtheriae obtained from Dr. J. W. McLeod, Leeds, England and minimus-type strains described by Frobisher in Baltimore. The minimus type was found to be a distinct colony variant and was differentiated from strains described as intermedius by Anderson, et al. Other small-colony variants have also been found differing from both the intermedius and minimus types.
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