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      Fosfomycin for the treatment of infections caused by multidrug-resistant non-fermenting Gram-negative bacilli: a systematic review of microbiological, animal and clinical studies

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      International Journal of Antimicrobial Agents
      Elsevier BV

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          Abstract

          The treatment of multidrug-resistant (MDR), extensively drug-resistant or pandrug-resistant non-fermenting Gram-negative bacterial infections constitutes a challenge in an era of few new antibiotic choices. This mandates the re-evaluation of already existing antibiotics such as fosfomycin. We systematically reviewed the literature to assess the clinical and microbiological effectiveness of fosfomycin in the treatment of these infections by searching PubMed, Scopus and the Cochrane Library databases. In 23 microbiological studies identified, 1859 MDR non-fermenting Gram-negative bacterial isolates were examined. The susceptibility rate to fosfomycin of MDR Pseudomonas aeruginosa isolates was >or=90% and 50-90% in 7/19 and 4/19 relevant studies, respectively. Cumulatively, 511/1693 (30.2%) MDR P. aeruginosa isolates were susceptible to fosfomycin. Serotype O12 isolates exhibited greater susceptibility. Only 3/85 (3.5%) MDR Acinetobacter baumannii and 0/31 MDR Burkholderia spp. isolates were susceptible to fosfomycin. Variable criteria of susceptibility were used in the included studies. Fosfomycin was synergistic in combination with a beta-lactam, aminoglycoside or ciprofloxacin in 46/86 (53.5%) MDR P. aeruginosa isolates. One animal study found a good therapeutic effect of the combination fosfomycin/gentamicin against MDR P. aeruginosa endocarditis. In six clinical studies, 33 patients with MDR P. aeruginosa infections (mainly pulmonary exacerbations of cystic fibrosis) received fosfomycin (25/33 in combination with other antibiotics); 91% of the patients clinically improved. In conclusion, fosfomycin could have a role as a therapeutic option against MDR P. aeruginosa infections. Further research is needed to clarify the potential utility of this agent.

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          Author and article information

          Journal
          International Journal of Antimicrobial Agents
          International Journal of Antimicrobial Agents
          Elsevier BV
          09248579
          August 2009
          August 2009
          : 34
          : 2
          : 111-120
          Article
          10.1016/j.ijantimicag.2009.03.009
          19403273
          3496e211-719f-4564-be78-01b7dbda4564
          © 2009

          https://www.elsevier.com/tdm/userlicense/1.0/

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