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School of Molecular & Biomedical Science |
Stemphylium sp.Colonies are rapid growing, brown to olivaceous-black or greyish and suede-like to floccose. Microscopically, solitary, darkly pigmented, terminal, multicellular conidia (dictyoconidia) are formed on a distinctive conidiophore with a darker terminal swelling. Note the conidiophore proliferates percurrently through the scar where the terminal conidium (poroconidium) was formed. Conidia are pale to mid-brown, oblong, rounded at the ends, ellipsoidal, obclavate or subspherical and are smooth or in part verrucose. Stemphylium should not be confused with Ulocladium which produces similar dictyoconidia from a sympodial conidiophore, not from a percurrent conidiogenous cell as in Stemphylium.
Conidiophores and conidia of Stemphylium sp.
Clinical significance:Most species are plant pathogens with occasional isolates from soil, they are rarely seen in the clinical laboratory. Mycosis: PhaeohyphomycosisFurther reading:Rippon, J.W. 1988. Medical Mycology. 3rd Edition. W.B. Saunders Co., Philadelphia, USA. McGinnis, M.R. 1980. Laboratory handbook of medical mycology. Academic Press, London, UK.
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