Application of Fluorescent-Antibody Procedures to the Study of Pathogenic Dematiaceous Fungi II. Serological Relationships of the Genus Fonsecaea

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Abstract
Gordon, Morris A. (New York State Department of Health, Albany), and Yousef Al-Doory . Application of fluorescent-antibody procedures to the study of pathogenic dematiaceous fungi. II. Serological relationships of the genus Fonsecaea . J. Bacteriol. 89: 551–556. 1965.—The staining spectra of fluorescein-labeled antiglobulins to Fonsecaea compactum, F. dermatitidis , and F. pedrosoi were determined with respect to 71 strains of morphologically related and 21 miscellaneous molds (including so-called “black yeasts”). All three conjugates showed considerable reaction with saprophytic Cladosporium spp. F. dermatitidis appeared to be most closely related serologically to the genus Cladosporium; F. compactum conjugate was fairly specific; and the few non-specific reactions of diluted F. pedrosoi reagent were almost unexceptionally with species of Fonsecaea and Cladosporium . Most strains of F. pedrosoi were unstained by F. compactum conjugate, and there was very little relationship shown between either of these species and Phialophora verrucosa . Conjugates of two strains of P. verrucosa failed to react with any of the three species of Fonsecaea . The possible significance of these results for classification of the “black yeasts” and other dematiaceous molds is discussed.

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