A dark-spored environmental mold often associated with grasses and outdoor plant debris.
Drechslera colonies are usually olive-brown to black and velvety. Microscopically, spores are elongated, multicelled, and darkly pigmented, which places it among the dematiaceous (dark-spored) molds often seen in outdoor air samples.
This fungus is most common outdoors on grasses, soil, and decaying plant material. Indoors, it is typically introduced through open windows, HVAC intake, and foot traffic, then settles in dust and occasionally grows on damp cellulose-rich materials.
Drechslera spores may trigger allergy-like symptoms such as sneezing, irritated eyes, and cough in sensitive occupants. In most indoor settings it is treated primarily as an allergenic exposure concern rather than a toxigenic mold threat.
Elevated indoor counts can follow leaks or humidity problems when dust and organic debris remain damp. Its presence often suggests that moisture control and cleaning of settled dust are both needed to reduce recurring spore load.
If you suspect mold growth in your home or business, contact us for a professional assessment.
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