Isolation of most of the etiologic agents of systemic mycosis from the environment has been accomplished by several workers.
Coccidioides immitis has been isolated by Stewart and Meyer,1 Davis and associates,2 and Emmons3; Histoplasma capsulatum by Emmons,4 Ajello and Zeidberg,5 and Grayston and associates6; Cryptococcus neoformans by San Felice,7 Emmons,8 and Ajello,* and Allescheria boydii by Emmons8 and Ajello.†
The first dermatophyte isolated from a nonliving source was Trichophyton mentagrophytes, which was found by Muende10 growing on dry horse dung in a shed where infected calves were lodged. The only other dermatophyte isolated from soil has been Microsporum gypseum, which was recovered by Downing11 from a strip of olive drab woolen cloth after a week's burial in a pot of soil. Although the soil had not been sterilized, this finding was indicative of the
FUENTES CA, BOSCH ZE, BOUDET CC. Isolation of Microsporum Gypseum from Soil. AMA Arch Derm. 1955;71(6):684–687. doi:10.1001/archderm.1955.01540300006002