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  • Title: Outcomes with daptomycin versus standard therapy for osteoarticular infections associated with Staphylococcus aureus bacteraemia.
    Author: Lalani T, Boucher HW, Cosgrove SE, Fowler VG, Kanafani ZA, Vigliani GA, Campion M, Abrutyn E, Levine DP, Price CS, Rehm SJ, Corey GR, Karchmer AW, S. aureus Endocarditis and Bacteraemia Study Group.
    Journal: J Antimicrob Chemother; 2008 Jan; 61(1):177-82. PubMed ID: 17999973.
    Abstract:
    OBJECTIVES: To evaluate the clinical characteristics, treatment and outcomes of patients with osteoarticular infections (OAIs) associated with Staphylococcus aureus bacteraemia (SAB). METHODS: The clinical characteristics and outcomes for patients with OAI were described using a post hoc analysis of an open label, randomized trial comparing daptomycin with standard therapy (vancomycin or anti-staphylococcal penicillin with initial gentamicin) for the treatment of SAB. RESULTS: OAI occurred in 32 of 121 patients (21 daptomycin and 11 standard therapy) with complicated SAB (18 septic arthritis, 9 vertebral osteomyelitis and 7 others). Two patients had osteomyelitis in more than one site. Success rates seen in two groups were as follows: vertebral osteomyelitis [3/5 (60%) daptomycin versus 0/2 (0%) comparator], septic arthritis [7/11 (64%) versus 3/5 (60%)], sternal osteomyelitis [3/3 (100%) versus 1/2 (50%)] and long bone osteomyelitis [0/1 (0%) versus 1/1 (100%)]. Success rates in both treatment groups improved with surgical therapy. Creatine phosphokinase elevations to >500 IU/L occurred in one patient on daptomycin who discontinued therapy, whereas renal impairment developed in three patients on standard therapy, two of whom discontinued therapy. Two patients treated with daptomycin and one patient on vancomycin had increases in S. aureus MICs to daptomycin and vancomycin, respectively. Three patients treated with daptomycin died following completion of therapy, with mortality attributed to multiple co-morbid conditions and inadequate debridement of OAIs in these patients. No deaths were reported in the standard therapy group. CONCLUSIONS: Daptomycin may be considered an alternative to standard therapy in the treatment of patients with complicated SAB and OAI.
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