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Mycologia Volume 94, 2002 - Issue 1
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Original Articles

Molecular and phenotypic description of Coccidioides posadasii sp. nov., previously recognized as the non-California population of Coccidioides immitis

M. C. Fisher The Institute of Zoology, Regent's Park, London NW1 4RY, UK
,
G. L. Koenig
,
T. J. White Roche Molecular Systems, 1145 Atlantic Avenue, Alameda, California 94501, USA
&
J. W. Taylor Department of Plant and Microbial Biology, University of California at Berkeley, Berkeley, California 94720-3102, USA
Pages 73-84 | Accepted 04 Jun 2001, Published online: 31 Jan 2017
 
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Abstract

Coccidioides posadasii sp. nov., formerly known as non-California (non-CA) Coccidioides immitis, is described. Phylogenetic analyses using single nucleotide polymorphisms, genes, and microsatellites show that C. posadasii represents a divergent, genetically recombining monophyletic clade. Coccidioides posadasii can be distinguished from C. immitis by numerous DNA polymorphisms, and we show how either of two microsatellite loci may be used as diagnostic markers for this species. Growth experiments show that C. posadasii has significantly slower growth rates on high-salt media when compared with C. immitis, suggesting that other phenotypic characters may exist.

We thank Jim Trappe for providing the Latin diagnosis, and Jamie Platt for advice. The National Institutes of Health and the California Healthcare Foundation contributed to funding this study.

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