Drechslera Mold SpeciesDrechslera biseptata is recently isolated from a brain abscess in a patient. (Information from A Clinical Laboratory Handbook: Identifying Filamentous Fungi)
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| Taxonomic Classifications
Kingdom:
Fungi
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Ecology Drechslera is a cosmopolitan fungus, dematiaceous fungus primarily isolated from plants and soil. Some species are considered as plant pathogens. Species
This genus lacks a known sexual state and is generally classified as a dark – walled dematiaceous fungus. McGinnis et. al. (1986) have reviewed the Drechslera isolates from human and animal disease and concluded that all pathogenic species are today considered as members of the genera Bipolaris and Exserohilum.
Pathogenicity and Health Effects
Drechslera biseptata is isolated from a brain abscess recently in a patient evidently lacking any predisposing condition. Drechslera biseptata is the sole species known to cause human or animal disease.
Macroscopic Appearance
Ø Growth is rapid colony texture is velvety to wooly; Ø Both surface and reverse colony color is initially white becoming olive brown to black.
Microscopic Appearance
Ø Hyphae are septate and brown in color; Ø Conidia are pale to dark brown in color, cylindrical or sub – cylindrical in shape, straight and smooth – walled, without a protuberant hilum, and arise through a pore in a sympodially elongating geniculate conidiophore; Ø Conidiophores are brown in color, simple or branched and geniculate; and Ø Germ tubes are observed developing perpendicularly to the long axis of the conidium.
Laboratory Precautions
Only general laboratory precautions are required, no special safety measures needed. |
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The mycological information gathered and organized in this extensive research on different Pathogenic Molds was sourced out from the list of informative websites and reference below:
http://www.osha.gov
A Clinical Laboratory Handbook: Identifying Filamentous Fungi by St. Germain, Guy and R. Summerbell. |
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