Coloured scanning electron micrograph (SEM) of Sporulating, filamentous fungus (Ulocladium chartarum). Filamentous hyphae are seen producing conidiophores with conidia (orange) at the tips. Ulocladium chartarum is widely distributed in nature and is the species most commonly found in indoor environments. It is a common indicator or water damage. It is found in house and mattress dust, in dry climates and in air conditioners. It is considered one of the most common mould allergens in the United States. The genus Ulocladium is a dematiaceous filamentous fungus that occurs in the soil and on decaying plants. It is related to the genus Alternaria and there is some cross-reactivity. Ulocladium has been reported to cause Type I (hay fever) allergy. There have been cases of Ulocladium chartarum causing skin infections and cutaneous mycoses in immuno-suppressed patients. Magnification: x500 when shortest axis printed at 25 millimetres.
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