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Journal of Clinical Microbiology, August 2005, p. 3807-3810, Vol. 43, No. 8
0095-1137/05/$08.00+0     doi:10.1128/JCM.43.8.3807-3810.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

In Vitro Susceptibilities of Clinical Isolates of Candida Species, Cryptococcus neoformans, and Aspergillus Species to Itraconazole: Global Survey of 9,359 Isolates Tested by Clinical and Laboratory Standards Institute Broth Microdilution Methods

M. A. Pfaller,1,3* L. Boyken,1 R. J. Hollis,1 S. A. Messer,1 S. Tendolkar,1 and D. J. Diekema1,2

Departments of Pathology,1 Medicine, Roy J. and Lucille A. Carver College of Medicine,2 Department of Epidemiology,3 College of Public Health, University of Iowa, Iowa City, Iowa 522424

Received 30 March 2005/ Returned for modification 29 April 2005/ Accepted 17 May 2005

The in vitro activity of itraconazole was determined against 7,299 isolates of Candida spp., 1,615 isolates of Cryptococcus neoformans, and 445 isolates of Aspergillus spp. obtained from over 200 medical centers worldwide. Itraconazole was active against all Candida spp. (96% of MICs were ≤1 µg/ml) with the exception of C. glabrata (77% of MICs were ≤1 µg/ml). Itraconazole inhibited 94% of C. krusei and 84% of other fluconazole-resistant Candida species, exclusive of C. glabrata, at a MIC of ≤1 µg/ml. Itraconazole was not active against fluconazole-resistant isolates of C. glabrata. Only modest activity was seen against C. neoformans (80% of MICs were ≤1 µg/ml); however, itraconazole showed excellent activity against Aspergillus spp. (94% of MICs were ≤1 µg/ml). These results provide an update on the antifungal activity of itraconazole against major opportunistic fungal pathogens. In light of the new intravenous formulation of itraconazole these data suggest that this agent remains a viable systemically active antifungal agent.

* Corresponding author. Mailing address: Department of Pathology, Medical Microbiology Division, C606 GH, University of Iowa College of Medicine, Iowa City, IA 52242. Phone: (319) 384-9566. Fax: (319) 356-4916. E-mail: michael-pfaller{at}uiowa.edu.

Journal of Clinical Microbiology, August 2005, p. 3807-3810, Vol. 43, No. 8
0095-1137/05/$08.00+0     doi:10.1128/JCM.43.8.3807-3810.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



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