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JAC Advance Access originally published online on May 9, 2005
Journal of Antimicrobial Chemotherapy 2005 55(6):1016-1019; doi:10.1093/jac/dki140
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© The Author 2005. Published by Oxford University Press on behalf of the British Society for Antimicrobial Chemotherapy. All rights reserved. For Permissions, please e-mail: journals.permissions{at}oupjournals.org

Effect of media composition and in vitro activity of posaconazole, caspofungin and voriconazole against zygomycetes

Cristina Gil-Lamaignere1, Regina Hess1, Stefanie Salvenmoser1, Kathrin Heyn1, Reinhard Kappe2 and Frank-Michael C. Müller1,*

1 Department of Paediatrics III, Paediatric Pulmonology and Infectious Diseases, University of Heidelberg, Im Neuenheimer Feld 153, D-69120 Heidelberg, Germany; 2 Haema Institute of Laboratory Medicine at the Helios Medical Center, Erfurt, Germany

* Corresponding author. Tel: +49-6221-56-8356; Fax: +49-6221-56-33853; Email: frank-michael_mueller{at}med.uni-heidelberg.de

Objectives: The effect of different media and composition on the in vitro activity of posaconazole, caspofungin and voriconazole against 59 zygomycetes species was determined.

Methods: The media tested were RPMI 1640 medium with and without 2% glucose, antibiotic medium 3 (AM3) with and without 2% glucose, and high resolution (HR) medium.

Results: Posaconazole was significantly more active than caspofungin and voriconazole, both in RPMI 1640 medium with 2% glucose and in HR medium. Adding glucose improved the determination of end points, but had only minor influence on the MICs. MICs evaluated in AM3 were lower than in RPMI 1640 medium or HR medium.

Conclusions: The in vivo effect of posaconazole in zygomycosis needs further evaluation.

Keywords: rhizopus , mucor , absidia , rhizomucor , cunninghamella


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