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JAC Advance Access published online on September 12, 2003

Journal of Antimicrobial Chemotherapy, doi:10.1093/jac/dkg425
© 2003 by The British Society for Antimicrobial Chemotherapy
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© 2003 The British Society for Antimicrobial Chemotherapy

Original article

Combination antifungal therapy of murine aspergillosis: liposomal amphotericin B and micafungin

John R. Graybill 1 , Rosie Bocanegra 1 , Gloria M. Gonzalez 2 , and Laura K. Najvar 1 *

1 The University of Texas Health Science Center at San Antonio, Department of Medicine, Division of Infectious Diseases (7881), 7703 Floyd Curl Drive, San Antonio, TX 78229-3900, USA
2 The University of Texas Health Science Center at San Antonio, Department of Medicine, Division of Infectious Diseases (7881), 7703 Floyd Curl Drive, San Antonio, TX 78229-3900, USA; Departamento de Microbiología, Facultad de Medicina, Universidad Autónoma de Nuevo León, Monterrey, N. L., Mexico

* Corresponding author. E-mail: najvar{at}uthscsa.edu.

Received 6 March 2003 ; revised 9 July 2003 ; accepted 18 July 2003

Abstract

Objectives: AmBisome and micafungin were used alone and in combination in a series of studies designed to identify any additive or antagonistic effects of combination antifungal therapy.

Methods: Immune-suppressed mice were infected either intravenously or intranasally with Aspergillus fumigatus. Micafungin, liposomal amphotericin B or both drugs together were administered for 7 days. Parameters of efficacy included survival and tissue burden of A. fumigatus.

Results: Whilst each drug was effective in murine aspergillosis, additive effects were observed only in reduction of tissue burden in limited experimental conditions. No antagonism was seen.

Conclusions: The present studies neither encourage nor discourage clinical use of combination therapy. Clinical trials are suggested before combined therapy is routinely adopted.

Keywords: antifungals, Aspergillus fumigatus, invasive aspergillosis
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