DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Coloured scanning electron micrograph (SEM) of Mould fruiting structures (Aspergillus versicolor). Conidia (asexual spores) are produced on the conidiophores (fruiting structures). Aspergillus versicolor is very common in damp places including: gypsum boards, carpets, mattresses, upholstered-furniture and damp walls. It is commonly found in soil, hay, cotton, and dairy products. It can produce a mycotoxin, sterigmatocystin, and cyclopiaxonic acid. Sterigmatocystin is reported to be carcinogenic to the liver and kidney, and it can cause such symptoms as diarrhoea and upset stomach. This genus can also cause skin infections in burn victims and the fungal lung infection aspergillosis (secondary infection to AIDS). Magnification: x305 when shortest axis printed at 25 millimetres.
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