General description[ edit ] The genus Acremonium is a large polyphyletic genus of approximately species, many of which are derived from a closely related families in the Sordariomycetes. Colonies are flat, with smooth, wet, velvety or floccose texture, sometimes resembling thin cottony mounds. Lower microscopy shows pin-head spore ball formation. Shown in the image is a microscopic image of A. Cases involving different species of Acremonium are often reported as simply as an Acremonium species, which reduces the amount of accurate information on the clinical presentation of A.
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It is a widespread mold currently believed to contain about species. Most species of this mold exist as saprophytes, being isolated from dead plant material and soil. Some species are parasites of plants and animals capable of causing serious infections. A few species are widely used for producing pharmaceuticals. Health Significance Acremonium Acremonium rarely cause disease in humans.
However, infection with Acremonium has been described in immunocompromised patients. It can cause fungal maxillary sinusitis. In medical literature, it has been reported as the cause of pulmonary infections and infections of the cornea and nails in individuals with weak immune systems. There are three main species of Acremonium associated with human infections: Acremonium falciforme, A.
The 3 species are biosafety level 2 fungi. Some species have been reported to be allergenic while some are known to produce mycotoxins. Occurrence of Acremonium in indoor environment In indoor environment, Acremonium species are primarily isolated from acoustic and thermal fibreglass insulation used in heating ventilation and air conditioning systems, cooling coils, drain pans, windowsills, and water from humidifiers.
Also found on carpet and mattress dust, damp or wet walls especially in basements , gypsum board and wallpaper. The most common species in indoor environment are Acremonium strictum and A.
Acremonium strictum is commonly encountered in wet, cellulose-based building materials suffering from chronic wet conditions. It can also be recovered from outside air samples.
Acremonium - Schimmelpilzgattung