vi Preface 



ing. The majority of the references concern articles available in English. 



It may be reiterated that pathogenic fungi are rarely found on the normal 

 skin. Thus, when such micro-organisms are present, the finding is of etiologic 

 importance in confirming a diagnosis of fungous disease. It is further notable 

 that pathogenic fungi do not multiply or thrive in the presence of acute 

 inflammation. For that reason the finding of pathogenic fungi in eczematous 

 tissue is of prime significance. It is unlikely that fungous disease would 

 supervene on contact dermatitis. 



It is a pleasure to repeat words of gratitude to our former teachers, Drs. 

 Fred D. Weidman and J. Gardner Hopkins, for awakening our interest in 

 the problems of medical mycology. During the years preceding the first 

 edition our laboratory was situated in the dermatologic department of the 

 New York Post-Graduate Medical School and Hospital and later in the 

 Skin and Cancer Unit of that institution. Dr. George M. MacKee was our 

 Chief and he provided us with facilities for many of our investigations. In 

 the fall of 1939, we transferred our laboratory to New York Hospital where 

 we have since been. Dr. Eugene F. Du Bois and, later, Dr. David P. Barr 

 encouraged us to continue our work and have given us a splendid opportu- 

 nity under almost ideal surroundings. For seven years our projects were 

 supported financially by the John and Mary R. Markle Foundation. 



It affords us pleasure to acknowledge the help we have received from col- 

 leagues in many parts of the country both by constructive criticism of former 

 editions and by the submission of supporting material. Dr. Harold L. 

 Temple kindly provided and interpreted several radiographs, Dr. Clement 

 B. Potelunas read the proof and Miss Eleanora Beemer generously provided 

 the requisite secretarial assistance. The Year Book Publishers have been 

 patient with demanding authors. The technical work in the book is all that 

 could be desired. 



We hope that this edition will be received with no less indulgence than 

 those which preceded it. 



—George M. Lewis 

 —Mary E. Hopper 

 June, 1948. 



