Fifteen isolations ofGymnoascus demonbreuniifrom canine and soil sources

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Abstract
Eleven isolations of Gymnoascus demonbreunii were obtained from a total of 265 dogs which were killed and tissues cultured for Histoplasma capsulatum. Seven of these isolates were obtained from lung tissue and 4 from mediastinal lymph nodes. The occurrence of this fungus in dogs is thought to be incidental because there were no lesions present nor fungal multiplication in the tissues since the highest number of colonies obtained from one organ was 9 and in the majority of cases only 1. H. capsulatum was isolated in addition to G. demonbreunii from 4 of the above 11 animals. Four isolates of G. demonbreunii were obtained from soils collected from chicken houses where H. capsulatum has also been isolated. After numerous studies, no relationship could be shown between G. demonbreunii and H. capsulatum with the exception of perhaps an environmental one.