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Molecular and Phenotypic Description of Coccidioides posadasii sp. nov., Previously Recognized as the Non-California Population of Coccidioides immitis

M. C. Fisher, G. L. Koenig, T. J. White and J. W. Taylor
Mycologia
Vol. 94, No. 1 (Jan. - Feb., 2002), pp. 73-84
DOI: 10.2307/3761847
Stable URL: http://www.jstor.org/stable/3761847
Page Count: 12
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Molecular and Phenotypic Description of Coccidioides posadasii sp. nov., Previously Recognized as the Non-California Population of Coccidioides immitis
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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.

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