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Colistin alone versus colistin plus meropenem for treatment of severe infections caused by carbapenem-resistant Gram-negative bacteria: an open-label, randomised controlled trial
Rambam Hlth Care Campus, Inst Infect Dis, IL-3109601 Haifa, Israel;Technion Israel Inst Technol, Fac Med, Haifa, Israel.
Laikon Gen Hosp, Dept Med 1, Athens, Greece;Univ Athens, Athens, Greece.
Univ Campania L Vanvitelli, Internal Med, Naples, Italy;AORN Colli Monaldi Hosp, Naples, Italy.
Beilinson Med Ctr, Infect Dis Unit, Petah Tiqwa, Israel;Tel Aviv Univ, Sackler Fac Med, Ramat Aviv, Israel.
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2018 (Engelska)Ingår i: Lancet. Infectious diseases (Print), ISSN 1473-3099, E-ISSN 1474-4457, Vol. 18, nr 4, s. 391-400Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Background: Colistin-carbapenem combinations are synergistic in vitro against carbapenem-resistant Gram-negative bacteria. We aimed to test whether combination therapy improves clinical outcomes for adults with infections caused by carbapenem-resistant or carbapenemase-producing Gram-negative bacteria.

Methods: A randomised controlled superiority trial was done in six hospitals in Israel, Greece, and Italy. We included adults with bacteraemia, ventilator-associated pneumonia, hospital-acquired pneumonia, or urosepsis caused by carbapenem-non-susceptible Gram-negative bacteria. Patients were randomly assigned (1:1) centrally, by computer-generated permuted blocks stratified by centre, to intravenous colistin (9-million unit loading dose, followed by 45 million units twice per day) or colistin with meropenem (2-g prolonged infusion three times per day). The trial was open-label, with blinded outcome assessment. Treatment success was defined as survival, haemodynamic stability, improved or stable Sequential Organ Failure Assessment score, stable or improved ratio of partial pressure of arterial oxygen to fraction of expired oxygen for patients with pneumonia, and microbiological cure for patients with bacteraemia. The primary outcome was clinical failure, defined as not meeting all success criteria by intention-to-treat analysis, at 14 days after randomisation. This trial is registered at ClinicalTrials.gov, number NCT01732250, and is closed to accrual.

Findings: Between Oct 1, 2013, and Dec 31, 2016, we randomly assigned 406 patients to the two treatment groups. Most patients had pneumonia or bacteraemia (355/406, 87%), and most infections were caused by Acinetobacter baumannii (312/406, 77%). No significant difference between colistin monotherapy (156/198, 79%) and combination therapy (152/208, 73%) was observed for clinical failure at 14 days after randomisation (risk difference -5.7%, 95% CI -13.9 to 2.4; risk ratio [RR] 0.93, 95% CI 0.83-1.03). Results were similar among patients with A baumannii infections (RR 0.97, 95% CI 0.87-1.09). Combination therapy increased the incidence of diarrhoea (56 [27%] vs 32 [16%] patients) and decreased the incidence of mild renal failure (37 [30%] of 124 vs 25 [20%] of 125 patients at risk of or with kidney injury).

Interpretation: Combination therapy was not superior to monotherapy. The addition of meropenem to colistin did not improve clinical failure in severe A baumannii infections. The trial was unpowered to specifically address other bacteria.

Ort, förlag, år, upplaga, sidor
ELSEVIER SCI LTD , 2018. Vol. 18, nr 4, s. 391-400
Nationell ämneskategori
Infektionsmedicin
Identifikatorer
URN: urn:nbn:se:uu:diva-353117DOI: 10.1016/S1473-3099(18)30099-9ISI: 000428231600034PubMedID: 29456043OAI: oai:DiVA.org:uu-353117DiVA, id: diva2:1216038
Tillgänglig från: 2018-06-11 Skapad: 2018-06-11 Senast uppdaterad: 2018-06-11Bibliografiskt granskad

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