Under the Scope
by Dr. Rajiv Sahay
There are over 100,000 species of fungi. Many fungi are
good and useful (edible mushrooms would be an example of these) while some
cause problems (some fungi can injure plants and humans). Every week the IEQ
Review will describe a specific microorganism, its morphological origin and
potential health effects. If you would like to know about a specific
organism and/or would like it published in The IEQ Review please email Dr.
Rajiv Sahay with the Environmental Diagnostics Laboratory (EDL) at
Pure Air Control Services laboratory@pureaircontrols.com
This week we will cover ...
Scedosporium prolificans
Scedosporium prolificans is a dematiaceous filamentous fungus
isolated from soil samples. Scedosporium prolificans can infect both
immunocompetent and immunocompromised hosts. Subcutaneous infections,
osteomyelitis, and arthritis are usually posttraumatic and may affect otherwise
healthy individuals. Disseminated infections, on the other hand, are mostly
encountered in patients who are immunosuppressed (particularly, neutropenic)
due to various reasons and are often fatal Scedosporium prolificans is now
recognized as the most common cause of disseminated Cases with pneumonia,
meningoencephalitis, and endocarditis have been reported. Ocular infections
(keratouveitis) and colonization by Scedosporium prolificans have also been
reported. Conclusively, optimal treatment of Scedosporium prolificans
infections remains yet unknown and there is a great demand for novel agents
with favorable activity. Importantly, the clinical outcome is closely
associated with the immune status of the host, extent of the infection, and
feasibility of concomitant surgical debridement.
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