Of the many genera of the family of Saccharomycetaceae,1 comparatively few play an etiologic rôle in dermatomycoses. The most important and the most frequent dermatologic lesion caused by yeasts is a deep infection first described by Gilchrist in 1914, and commonly known as blastomycosis. This dermatomycosis is caused by the genera Saccharomyces (Blastomyces), Cryptococcus and Coccidioides. The peculiar warty lesions and abscesses that characterize this affection are well known and need not here be described. On the other hand, yeast infection may occur superficially. Thrush is the best known instance. Other instances of less frequent occurrence will be pointed out later, with particular reference to an infection known as intertrigo saccharomycetica, cases of which are herein reported.
Thrush, caused by Oidium albicans and certain species of Monilia, occurs as a white or creamy adherent membrane on an erythematous base, most frequently on the oral mucous membranes of infants. It