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Journal of Clinical Microbiology, January 2005, p. 101-111, Vol. 43, No. 1
0095-1137/05/$08.00+0     doi:10.1128/JCM.43.1.101-111.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

Multigene Phylogenetic Analysis of Pathogenic Candida Species in the Kazachstania (Arxiozyma) telluris Complex and Description of Their Ascosporic States as Kazachstania bovina sp. nov., K. heterogenica sp. nov., K. pintolopesii sp. nov., and K. slooffiae sp. nov.

Cletus P. Kurtzman,1* Christie J. Robnett,1 Jerrold M. Ward,2 Cory Brayton,3 Peter Gorelick,4 and Thomas J. Walsh2

Microbial Genomics and Bioprocessing Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, Peoria, Illinois,1 Immunocompromised Host Section, Pediatric Oncology Branch, National Cancer Institute, Bethesda, Maryland,2 Center for Comparative Medicine, The Baylor College of Medicine, Houston, Texas,3 Animal Health Diagnostic Laboratory, National Cancer Institute at Frederick, SAIC Frederick, Frederick, Maryland4

Received 2 July 2004/ Returned for modification 3 September 2004/ Accepted 13 September 2004

A yeast causing widespread infection of laboratory mice was identified from 26S rRNA gene sequences as Candida pintolopesii. To determine the relationship of C. pintolopesii with other members of the Kazachstania (Arxiozyma) telluris species complex, nucleotide sequences from domains 1 and 2 of the 26S rRNA gene, the mitochondrial small-subunit rRNA gene, and the RNA polymerase II gene were phylogenetically analyzed. That analysis resolved the 48 strains examined into five closely related species: K. telluris, Candida bovina, C. pintolopesii, Candida slooffiae, and a previously unknown species. One or more strains of each of the last four species formed an ascosporic state much like that of K. telluris. To place these ascosporogenous strains taxonomically, it is proposed that they be assigned to the teleomorphic genus Kazachstania as K. bovina (type strain NRRL Y-7283, CBS 9732, from the nasal passage of a pigeon), K. heterogenica (type strain NRRL Y-27499, CBS 2675, from rodent feces), K. pintolopesii (type strain NRRL Y-27500, CBS 2985, from the peritoneal fluid of a dead guinea pig), and K. slooffiae (type strain NRRL YB-4349, CBS 9733, from the cecum of a horse). On the basis of multigene sequence analyses, K. heterogenica appears to be a hybrid of K. pintolopesii and a presently unknown species. With the exception of K. bovina, the phylogenetically defined species show a moderate degree of host specificity.

* Corresponding author. Mailing address: Microbial Genomics and Bioprocessing Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, 1815 N. University St., Peoria, IL 61604. Phone: (309) 681-6561. Fax: (309) 681-6672. E-mail: kurtzman{at}ncaur.usda.gov.

Journal of Clinical Microbiology, January 2005, p. 101-111, Vol. 43, No. 1
0095-1137/05/$08.00+0     doi:10.1128/JCM.43.1.101-111.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



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