Caption: Black mold (Aspergillus brasiliensis) - fruiting structure and spores. Aspergillus brasiliensis is a newly described species which was in part created by the transfer of several existing Aspergillus niger strains to the new species A. brasiliensis. It can be distinguished from A. niger based on both phenotypic and genotypic features. The Internal Transcribed Spacer (ITS) regions and scanning electron microscopy (SEM) were 2 methods used in a polyphasic approach to describe this novel organism. The type strain was isolated from soil in Brazil. Aspergillus brasiliensis is a ubiquitous soil fungus. The conidiophore (fruiting structure) is the swollen end of a hyphae (the fungal vegetative structure) from which radiate numerous sterigmata (short lengths of narrow hyphae) ending in short chains of conidia (spores). Aspergillus species are common saprophytic molds that grow in household dust, soil, and decaying vegetable matter, including stale food. Some species cause a variety of diseases in humans, including: otomycosis, a chronic fungal growth of the passage into the ear; allergic aspergillosis, a hypersensitive reaction (lung disease) provoked by repeated inhalation of Aspergillus spores.
Magnification*: x67
Type: SEM
Copyright 2009 Dennis Kunkel Microscopy, Inc.
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