Development of Molecular Methods for Identification of Schizophyllum commune from Clinical Samples

Author:

Buzina Walter1,Lang-Loidolt Doris1,Braun Hannes1,Freudenschuss Kurt1,Stammberger Heinz1

Affiliation:

1. ENT University Hospital, Karl-Franzens-University Graz, A 8036 Graz, Austria

Abstract

ABSTRACT In the last 50 years, to our knowledge, only 16 cases of diseases caused by Schizophyllum commune in humans have been reported. Within only 6 months, we found four isolates of this basidiomycetous fungus, obtained from patients suffering from chronic sinusitis. The cultures of the isolated fungi showed neither clamp connections nor fruiting bodies (basidiocarps), which are distinctive features for S. commune , but fast-growing cottony white mycelium only. This was harvested, and DNA was extracted. The internal transcribed spacer region of the ribosomal DNA (rDNA) was amplified with fungus-specific primers, and the PCR products were sequenced. Two strains of S. commune , collected from branches of a European hornbeam ( Carpinus betulus ) and a tree of heaven ( Ailanthus altissima ), respectively; four specimens from the herbarium of the Institute of Botany, Karl-Franzens-University Graz; and two strains from internationally known culture collections (CBS 340.81 [ATCC 44201] and CBS 405.96) were investigated in the same way. The sequence data of all strains were compared and showed homology of over 99% in this 660-bp-long fragment of rDNA. With these results, a map of restriction enzyme cutting sites and a primer set specific for S. commune were created for reliable identification of this human pathogenic fungus.

Publisher

American Society for Microbiology

Subject

Microbiology (medical)

Reference31 articles.

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3. Buzina W. Molecular examinations on human pathogenic dermatophytes. Ph.D. thesis. 1999 Karl-Franzens-University Graz Graz Austria

4. Basidiomycetous (mushroom) infection of the maxillary sinus;Catalano P.;Otolaryngol. Head Neck Surg.,1990

5. Isolation of Schizophyllum commune from a sputum;Cifferi R.;Atti Ist. Bot. Lab. Crittogam. Univ. Pavia,1956

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