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. 1993 Jul;31(7):1804–1810. doi: 10.1128/jcm.31.7.1804-1810.1993

A phaeohyphomycotic cyst and peritonitis caused by Phialemonium species and a reevaluation of its taxonomy.

D King 1, L Pasarell 1, D M Dixon 1, M R McGinnis 1, W G Merz 1
PMCID: PMC265636  PMID: 8349757

Abstract

Two cases of human fungal infections caused by members of the genus Phialemonium, a genus proposed by Gams and McGinnis (1983) for fungi intermediate between the genera Acremonium and Phialophora, are presented. The first case was a phaeohyphomycotic cyst on the foot of a renal transplant recipient. The fungus was detected by direct examination and histopathology and was recovered by several procedures over 4 months. It was flat, glabrous, and white becoming yellow with the production of a diffusible yellow pigment; it had conidiophores that were mostly solitary and lateral and terminal phialides and adelophialides with distinct collarettes producing cylindrical to curved conidia. The isolate resembled both Phialemonium dimorphosporum and Phialemonium curvatum, although its characteristics were more consistent with those of the latter. The second case was peritonitis in a renal transplant recipient. The fungus was white-to-cream colored and yeast like, but later became black with a green diffusible pigment, and produced obovoid conidia; it was easily identified as Phialemonium obovatum. Difficulties encountered in the identification and taxonomy of members of this genus highlight the need for standardized conditions, e.g., potato dextrose agar culture incubated at 24 to 25 degrees C for morphologic comparisons, to control significant variations due to culture conditions.

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Selected References

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