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Journal of Clinical Microbiology, September 2001, p. 3362-3364, Vol. 39, No. 9
0095-1137/01/$04.00+0   DOI: 10.1128/JCM.39.9.3362-3364.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Discrimination between Candida albicans and Other Pathogenic Species of the Genus Candida by Their Differential Sensitivities to Toxins of a Panel of Killer Yeasts

P. Buzzini* and A. Martini

Dipartimento di Biologia Vegetale e Biotecnologie Agroambientali, Sezione di Microbiologia Applicata, University of Perugia, 06100 Perugia, Italy

Received 2 October 2000/Returned for modification 14 December 2000/Accepted 15 May 2001

The differential sensitivities to toxins produced by a short panel of four killer yeasts allowed discrimination between 91 strains of the yeast Candida albicans and 223 non-C. albicans Candida strains. One hundred percent of C. albicans isolates exhibited negative results to the toxin panel, while 100% of non-C. albicans cultures gave well-defined and reproducible positive results to at least one of the four killer toxins. Among C. albicans strains only 96 and 87% gave germ tube (GT)- and chlamydospore-positive results, respectively. In addition a few GT-false-positive strains were detected among non-C. albicans isolates. Susceptibility to the toxin panel is apparently expressed more consistently than either GT or chlamydospore production and may constitute a promising basis for a new simple and easy-to-use procedure for routine discrimination between the species C. albicans and other species of the genus Candida.

* Corresponding author. Mailing address: Dipartimento di Biologia Vegetale e Biotecnologie Agroambientali, Sezione di Microbiologia Applicata, University of Perugia, 06100 Perugia, Italy. Phone: 39 075 585 6455. Fax: 39 075 585 6470. E-mail: pbuzzini{at}unipg.it.

Journal of Clinical Microbiology, September 2001, p. 3362-3364, Vol. 39, No. 9
0095-1137/01/$04.00+0   DOI: 10.1128/JCM.39.9.3362-3364.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.




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