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Imipenem plus Fosfomycin as Salvage Therapy for Vertebral Osteomyelitis
Itaru Nakamura1, Tetsuo Yamaguchi2, Kotaro Aoki3
1Department of Infection Prevention and Control, Tokyo Medical University Hospital, Tokyo, Japan.
Abstract:
We applied combination antibiotic therapy to treat vertebral osteomyelitis and a psoas abscess caused by glycopeptide-intermediate (MIC, 2 μg/ml) and daptomycin-nonsusceptible (>2 μg/ml) methicillin-resistant Staphylococcus aureus The Etest synergy test showed the largest synergistic effects for imipenem/cilastatin and fosfomycin. Whole-gene sequencing showed amino acid changes in SA0802, SA1193 (mprF), and SA1531 (ald). Four weeks of combination treatment using imipenem/cilastatin (1.5 g per day) and fosfomycin (4.0 g per day) resulted in clinical improvement.
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