JAC Advance Access originally published online on July 23, 2007
Journal of Antimicrobial Chemotherapy 2007 60(3):673-676; doi:10.1093/jac/dkm264
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Efficacy of amphotericin B lipid complex in a rabbit model of coccidioidal meningitis
1 California Institute for Medical Research, San Jose, CA, USA 2 Department of Medicine, Division of Infectious Diseases, Santa Clara Valley Medical Center, San Jose, CA, USA 3 Department of Medicine, Division of Infectious Diseases and Geographic Medicine, Stanford University, Stanford, CA, USA 4 Department of Pathology, Stanford University, Stanford, CA, USA 5 Veterans Affairs Medical Center, Palo Alto, CA, USA
Received 20 February 2007; returned 20 April 2007; revised 18 June 2007; accepted 22 June 2007
* Correspondence address. Division of Infectious Diseases, Santa Clara Valley Medical Center, 751 South Bascom Avenue, San Jose, CA 95128-2699, USA. Tel: +1-408-998-4557; Fax: +1-408-998-2723; E-mail: clemons{at}cimr.org
Objectives: We compared the efficacy of treatments in a rabbit model of coccidioidal meningitis (CM).
Methods: Rabbits were infected intracisternally with Coccidioides immitis and treated with intravenous amphotericin B lipid complex (ABLC), deoxycholate amphotericin B (dAMB), oral fluconazole or diluent [sterile 5% dextrose in water (D5W)]. Survival and cfu in brain, spinal cord and CSF were determined and histology studied. Amphotericin B (AMB) concentrations in serum, CSF and tissue were determined by bioassay.
Results: Fluconazole-treated rabbits and controls lost weight and had decreased mobility. All treatments prolonged survival (P = 0.005) and reduced cfu in brain and spinal cord (P
0.008); ABLC or dAMB significantly reduced cfu in CNS tissues compared with fluconazole (all P
0.02). ABLC cleared cfu from CSF faster than dAMB or fluconazole. Histologically, 9/9, 7/8 and 0/24 of the D5W, fluconazole and amphotericin groups, respectively, had severe meningitis. Serum AMB was higher after ABLC at 15 mg/kg than after dAMB (P
0.02).
Conclusions: Intravenous ABLC was efficacious and could be a treatment option for CM.
Keywords: amphotericin B lipid complex , Coccidioides immitis , AMB
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