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Journal of Clinical Microbiology, September 2005, p. 4574-4579, Vol. 43, No. 9
0095-1137/05/$08.00+0     doi:10.1128/JCM.43.9.4574-4579.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

Microsatellite Marker Analysis as a Typing System for Candida glabrata

F. Foulet,1 N. Nicolas,1 O. Eloy,2 F. Botterel,1 J.-C. Gantier,3 J.-M. Costa,1,4 and S. Bretagne1,2,3*

Laboratoire de Parasitologie-Mycologie, Hôpital Henri-Mondor-APHP and Université Paris 12, Créteil,1 Laboratoire de Parasitologie, Hôpital Mignot, Versailles,2 Centre National de Référence Mycologie et Antifongiques, Institut Pasteur, Paris,3 Laboratoire de Biologie Moléculaire, Hôpital Américain, Neuilly, France4

Received 23 February 2005/ Returned for modification 25 March 2005/ Accepted 7 June 2005

Candida glabrata is one of the most important causes of nosocomial fungal infection. We investigated, using a multiplex PCR, three polymorphic microsatellite markers, RPM2, MTI, and ERG3, in order to obtain a rapid genotyping method for C. glabrata. One set of primers was designed for each locus, and one primer of each set was dye labeled to read PCR signals using an automatic sequencer. Eight reference strains including other Candida species and 138 independent C. glabrata clinical isolates were tested. The clinical isolates were collected from different anatomical sites of adult patients either hospitalized in different wards of two different hospitals or not hospitalized. Since C. glabrata is haploid, one single PCR product for each PCR set was obtained and assigned to an allele. The numbers of different alleles were 5, 7, and 15 for the RPM2, MTI, and ERG3 loci, respectively. The number of allelic associations was 21, leading to a discriminatory power of 0.84. The markers were stable after 25 subcultures, and the amplifications were specific for C. glabrata. A factorial correspondence analysis did not indicate any correlation between the 21 multilocus genotypes and the clinical data (source, sex, ward, anatomical sites). Microsatellite marker analysis is a rapid and reliable technique to investigate clinical issues concerning C. glabrata. However, its discriminatory power should be improved by testing other polymorphic microsatellite loci.

* Corresponding author. Mailing address: Laboratoire de Parasitologie-Mycologie, Hôpital Henri-Mondor, 51 avenue du Maréchal de Lattre de Tassigny, 94010 Créteil, France. Phone: 33 1 49 81 36 41. Fax: 33 1 49 81 36 01. E-mail: bretagne{at}univ-paris12.fr.

Journal of Clinical Microbiology, September 2005, p. 4574-4579, Vol. 43, No. 9
0095-1137/05/$08.00+0     doi:10.1128/JCM.43.9.4574-4579.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



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