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Journal of Clinical Microbiology, 03 1995, 769-771, Vol 33, No. 3
Copyright © 1995 by the American Society for Microbiology. All rights reserved.

Molecular epidemiology of Candida isolates from AIDS patients showing different fluconazole resistance profiles

A Lischewski, M Ruhnke, I Tennagen, G Schonian, J Morschhauser and J Hacker
Zentrum fur Infektionsforschung, Universitat Wurzburg, Germany.

Thirty Candida isolates obtained from the oropharynxes of three AIDS patients were genotypically characterized. In vitro fluconazole MIC determination revealed increasing fluconazole resistances during treatment, thereby confirming the in vivo situation. Pulsed-field gel electrophoresis karyotyping, randomly amplified polymorphic DNA analysis, and hybridizations with Candida albicans repetitive element 2 were used to determine possible genotypic changes. The isolates from two patients showed genetic homogeneity, suggesting the selection for resistant variants. One patient experienced a strain switch to Candida krusei. Horizontal spread of identical strains between the patients could be excluded. However, the molecular methods used might not be sufficient to detect the underlying genetic basis of resistance to fluconazole.


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