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Journal of Clinical Microbiology, April 2000, p. 1468-1471, Vol. 38, No. 4
0095-1137/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Intraspecies Diversity of Cryptococcus laurentii as Revealed by Sequences of Internal Transcribed Spacer Regions and 28S rRNA Gene and Taxonomic Position of C. laurentii Clinical Isolates

Takashi Sugita,1,* Masako Takashima,2 Reiko Ikeda,1 Takashi Nakase,2 and Takako Shinoda1

Department of Microbiology, Meiji Pharmaceutical University, Kiyose, Tokyo,1 and Japan Collection of Microorganisms, RIKEN (The Institute of Physical and Chemical Research), Wako, Saitama,2 Japan

Received 29 November 1999/Returned for modification 27 December 1999/Accepted 19 January 2000

The intraspecies diversity of an opportunistic yeast pathogen, Cryptococcus laurentii, was revealed by analysis of the sequences of the internal transcribed spacer regions and the 28S rRNA gene. Ten strains of C. laurentii were grouped into two major phylogenetic groups and were further divided into at least seven species. Four of the strains isolated from patients did not represent a single species but showed heterogeneity. These results suggest that C. laurentii is a genetically heterogeneous species, and this must be taken into consideration when identifying C. laurentii clinical isolates.

* Corresponding author. Mailing address: Department of Microbiology, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo, 204-8588 Japan. Phone and Fax: 81-424-95-8762. E-mail: sugita{at}my-pharm.ac.jp.

Journal of Clinical Microbiology, April 2000, p. 1468-1471, Vol. 38, No. 4
0095-1137/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


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