Scytalidium Mold Species
Scytalidium
species are causative agents of
Dermatomycosis, (Information from www.doctorfungus.org @ 2005)
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Taxonomic Classifications
Kingdom:
Fungi
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Ecology Scytalidium is a cosmopolitan, saprobic fungus which is at times associated with decaying wood or soil, and sometimes with woody plants diseases, particularly in tropical and sub – tropical regions.
Species
This genus lacks a known sexual state and is generally classified as a dark – walled dematiaceous fungus. There are five existing species under the Scytalidium genus namely, Scytalidium dimidiatum, Scytalidium hyalinum, Scytalidium infestans, Scytalidium japonicum, and Scytalidium lignicola.
Pathogenicity and Health Effects
Scytalidium species is an occasional agent of nail or skin infections. Some cases of subcutaneous or disseminated infection have also been noted. Additionally, Scytalidium dimidiatum and Scytalidium hyalinum are causative agents of onychomycosis and dermatomycosis.
Macroscopic Appearance
Ø Growth rate is very rapid and colony texture is wooly; and Ø Both surface and reverse colony color ranges from white to gray.
Microscopic Appearance
Ø Hyphae are septate, hyaline or pale gray in color; and Ø Arthroconidia are hyaline or pale brown in color, ellipsoidal - or oval – shaped, and unicellular or bicellular.
Table 1. Microscopic Feature Differences in Scytalidium arthroconidia.
Susceptibility
Scytalidium dimidiatum and Scytalidium hyalinum are usually inhibited by cycloheximide.
Remarks
Scytalidium, unlike Geotrichum, produces wooly colonies and brown – pigmented hyphae and arthroconidia.
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The mycological information gathered and
A
Clinical Laboratory Handbook:
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