Hyaline Hyphomyces Forming Conidia Singly

Scedosporium apiospermum

s. apiospermum
Formerly known as Monosporium apiospermum, S. apiospermum is the anamorph of Pseudallescheria boydii. Many authors consider this species a dematiaceous fungus (e.g. The ASM Manual of Clinical Microbiology 7th ed. and Larone's Medically Important Fungi: A Guide to Identification 3rd ed.) However, since Koneman et al. describe the species as hyalohyphomyces in their Color Atlas and Textbook of Diagnostic Microbiology, I've elected to describe it here with the hyaline hyphomyces for convenient cross-reference with that text.

FIG. 1. Scedosporium apiospermum in slide culture.

scedosporium apiospermum

Pseudallescheria boydii

Pseudallescheria boydii is the teleomorphic or sexual stage of Scedosporium apiospermum.

Scedosporium inflatum

s. prolificans
Also referred to as S. prolificans.
scedosporium inflatum

FIG. 1. Scedosporium inflatum in slide culture. Arrow indicate "crooked neck" characteristic of the organism.

FIG. 2. Scedosporium inflatum in slide culture.

scedosporium inflatum



FIG. 1. Chrysosporium in slide culture. Conidia here are borne in short chains.



FIG. 1. Sepedonium in slide culture. Histoplasma is in the differential diagnosis here.

FIG. 2. Sepedonium cleistothecia in slide culture.


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Copyright © 2001, William McDonald, M.D.
Revised: 26 November 2002