THE FIRST case of North American blastomycosis (Blastomyces dermatitidis) apparently was reported by Gilchrist1 to the American Dermatological Association in June 1894. The name Gilchrist's disease has since been frequently applied to the condition caused by B. dermatitidis which usually occurs in the form of a chronic infection. The disease is characterized by the formation of granulomatous lesions associated often with intraepithelial, suppurative foci. Two workers, Jacobson2 and Moore,3 are largely responsible for the division of the disease into two categories: (1) a systemic type, which probably originates as a pulmonary infection and becomes dispersed throughout the body, usually proceeding to a fatal termination, and (2) a cutaneous type, which is the commoner form and is associated with verrucous, granulomatous lesions showing intradermal abscesses on microscopic section.
Clinically, North American blastomycosis is closely related to the paracoccidioidal (South American blastomycosis) type of infection found in the southern
KELLER AP, MEISSNER TOW. BLASTOMYCOSIS OF THE EXTERNAL AUDITORY CANAL (BLASTOMYCES DERMATITIDIS). AMA Arch Otolaryngol. 1951;53(3):296–298. doi:10.1001/archotol.1951.03750030055006
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