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Black Aspergillus, Black Koji Mold
Aspergillus niger Tiegh. is a ubiquitous filamentous mold that forms black, powdery colonies (not to be confused with the indoor 'black mold' Stachybotrys chartarum) from dark conidial heads. It is one of the most important industrial fungi, used for producing citric acid and many enzymes, and it holds GRAS status for several food-processing uses. In mushroom cultivation it is a common contaminant of grain spawn and agar, appearing as white mycelium that rapidly turns black with spores.
Not edible. Industrial and food-processing organism (citric acid, enzymes). Spores can cause allergy and, rarely, opportunistic infection (aspergillosis, otomycosis) in vulnerable people; some strains produce ochratoxin A or fumonisins.
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