Drug Resistance of Staphylococci 273 



may be the major factor in the production of penicilhnase- 

 producing staphylococci. 



The term Staph, aureus is used throughout to denote coagu- 

 lase-positive staphylococci, regardless of pigment production. 



Acknowledgement 



The author's thanks are due to Mr. A. L. Wooding for the photo- 

 graphs. 



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