JAC Advance Access published online on April 14, 2003
Journal of Antimicrobial Chemotherapy, doi:10.1093/jac/dkg231
© 2003 by The British Society for Antimicrobial Chemotherapy
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Brief report
1 Division of Microbiology, Department of Research and Development,
Statens Serum Institut, Copenhagen, Artillerivej 5, DK-2300 Copenhagen
S, Denmark
* Corresponding author. E-mail: coa{at}ssi.dk.
Received 20 January 2003
; revised 6 February 2003
; accepted 27 February 2003
Objectives: Combination therapy that
includes fusidic acid, an antimicrobial agent highly active against
staphylococci, has been recommended in the treatment of patients
with Staphylococcus aureus meningitis. The aim
of this study was to evaluate the pharmacokinetic, CSF bactericidal and
anti-inflammatory properties of fusidic acid. Methods: The pharmacokinetics, treatment efficacy
and parameters of the meningeal inflammatory response were studied
in rabbits, using an experimental meningitis model against S.
aureus (MICs of fusidic acid and methicillin were 0.125 and
1 mg/L, respectively). Results: Fusidic acid entered the CSF, with
peak values within 0.5-1 h of the intravenous bolus injection/infusion
and with a percentage penetration (AUCCSF/AUCserum)
into uninfected and purulent CSF of 1.9% ± 0.7
and 4.5% ± 0.7, respectively.
Rabbits treated with antibiotics [fusidic acid 80 mg/kg/6
h (n = 6), methicillin 80 mg/kg/3 h (n = 7) and the two combined (n = 6)] had
significantly higher bacterial kill rates than untreated controls
(n = 6, P < 0.05).
Combination therapy was less effective, with significantly less
killing after 6 h of treatment than methicillin alone (P < 0.05).
CSF white blood cells and CSF levels of interleukin-8 (IL-8), glucose,
lactate and protein were altered during staphylococcal meningitis,
but with no significant difference between antibiotic-treated and
untreated rabbits. Conclusions: Antagonism between methicillin
and fusidic acid was observed in staphylococcal meningitis.
Keywords: fusidic acid, Staphylococcus aureus, meningitis,
methicillin, antagonism
Evaluation of fusidic acid in therapy of experimental
Staphylococcus aureus meningitis
stergaard 1*,
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