Document Detail

Comparative evaluation of chemiluminescent DNA probe assays and exoantigen tests for rapid identification of Blastomyces dermatitidis and Coccidioides immitis.
MedLine Citation:
PMID:  8027336     Owner:  NLM     Status:  MEDLINE    
Chemiluminescent DNA probe (Accuprobe) assays developed by Gen-Probe, Inc. (San Diego, Calif.), for the rapid identification of Blastomyces dermatitidis and Coccidioides immitis were evaluated and compared with the exoantigen test by using 74 mycelial cultures of B. dermatitidis and 72 mycelial cultures of C. immitis. Seventeen isolates of the dimorphic pathogen Paracoccidioides brasiliensis were included because of their gross morphologic and antigenic relatedness to B. dermatitidis. The heterologous fungi, namely, species of Chrysosporium, which are often confused with B. dermatitidis, and species of Malbranchea, which morphologically resemble C. immitis, were tested. All 74 of the B. dermatitidis mycelial isolates were correctly identified by the Accuprobe assay for B. dermatitidis within 2 h. However, the B. dermatitidis probe cross-hybridized with rRNA extracts of 10 of the 17 P. brasiliensis isolates, misidentifying them as B. dermatitidis. All 72 of the C. immitis isolates were identified correctly with the C. immitis probe. None of the other heterologous fungi belonging to Chrysosporium spp., Malbranchea spp., Onychocola canadensis, and Geotrichum sp. were cross-reactive with the B. dermatitidis and C. immitis probes. The exoantigen tests specifically identified 74 B. dermatitidis, 72 C. immitis, and 17 P. brasiliensis isolates within 48 to 72 h and differentiated the related heterologous fungi from the three dimorphic fungal pathogens.
A A Padhye; G Smith; P G Standard; D McLaughlin; L Kaufman
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of clinical microbiology     Volume:  32     ISSN:  0095-1137     ISO Abbreviation:  J. Clin. Microbiol.     Publication Date:  1994 Apr 
Date Detail:
Created Date:  1994-08-05     Completed Date:  1994-08-05     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  7505564     Medline TA:  J Clin Microbiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  867-70     Citation Subset:  IM    
Emerging Bacterial and Mycotic Diseases Branch, Centers for Disease Control and Prevention, Atlanta, Georgia 30333.
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MeSH Terms
Antigens, Fungal / isolation & purification
Blastomyces / genetics,  immunology,  isolation & purification*
Coccidioides / genetics,  immunology,  isolation & purification*
DNA Probes
Evaluation Studies as Topic
Luminescent Measurements
Molecular Probe Techniques
Mycology / methods*
Soil Microbiology
Reg. No./Substance:
0/Antigens, Fungal; 0/DNA Probes

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