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Journal of Clinical Microbiology, Nov 1995, 2913-2919, Vol 33, No. 11
GS Sandhu, BC Kline, L Stockman and GD Roberts
We have developed 21 specific nucleic acid probes which target the large
subunit rRNA genes from Aspergillus flavus, Aspergillus fumigatus,
Aspergillus glaucus, Aspergillus niger, Aspergillus terreus, Blastomyces
dermatitidis, Candida albicans, Candida (Torulopsis) glabrata, Candida
guilliermondii, Candida kefyr, Candida krusei, Candida lusitaniae, Candida
parapsilosis, Candida tropicalis, Coccidioides immitis, Cryptococcus
neoformans var. gattii, Cryptococcus neoformans var. neoformans,
Filobasidiella neoformans var. bacillispora, Filobasidiella neoformans var.
neoformans, Histoplasma capsulatum, Pseudallescheria boydii, and Sporothrix
schenckii. A section of the 28S rRNA gene from approximately 100 fungi,
representing about 50 species of pathogens and commonly encountered
saprophytes, was sequenced to develop universal PCR primers and
species-specific oligonucleotide probes. Each step in the process of
detection and identification was standardized to a common set of conditions
applicable without modification to all fungi of interest and all types of
clinical specimens. These steps consist of DNA extraction by boiling
specimens in an alkaline guanidine-phenol-Tris reagent, amplification of a
variable region of the 28S rRNA gene with universal primers, and amplicon
identification by probe hybridization or DNA sequencing performed under
conditions identical for all fungi. The results obtained by testing a panel
of fungal isolates and a variety of clinical specimens indicate a high
level of specificity.
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Molecular probes for diagnosis of fungal infections [published erratum appears in J Clin Microbiol 1996 May;34(5):1350]
Department of Biochemistry and Molecular Biology, Mayo Clinic and Foundation, Rochester, Minnesota 55905, USA.
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