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School of Biological Sciences
The University of Adelaide

Dr David Ellis

Scedosporium apiospermum

Synonymy: Pseudallescheria apiosperma

RG-2 organism.

Morphological Description: Colonies are fast growing, greyish-white, suede-like to downy with a greyish-black reverse. Numerous single-celled, pale-brown, broadly clavate to ovoid conidia, 4-9 x 6-10 µm, rounded above with truncate bases are observed. Conidia are borne singly or in small groups on elongate, simple or branched conidiophores or laterally on hyphae. Conidial development can be described as annellidic, although the annellations (ring-like scars left at the apex of an annellide after conidial secession) are extremely difficult to see. Erect synnemata may be present in some isolates. Optimum temperature for growth is 30-37C.

Culture of Scedosporium apiospermum.

Conidiophores and conidia

Scedosporium apiospermum conidiophores and conidia, synnemata.

Mycosis: Scedosporium infection