This organism was isolated from a sinus aspirate of a patient with chronic sinusitis and respiratory allergies.Identify the organism shown below.

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Although these isolates may be recovered from virtually any source, they are primarily implicated in chronic fungal sinusitis.Patients are often misdiagnosed and treated for an extended time for bacterial sinusitis.Microscopic evaluation reveals short conidiophores bearing conidia in chains that lengthen in an acropetal fashion.Multicelled conidia have angular cross walls and taper toward the distal end.Alternaria spp.are dematiaceous, rapidly growing fungi with colonies ranging from shades of gray, to brown, to black.CDC PHIL #3962

This Organism Was Isolated from a Sinus Aspirate of a Patient