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In Vitro Activity of Cefiderocol, a Siderophore Cephalosporin, Against Gram-Negative Bacilli Isolated by Clinical Laboratories in North America and Europe in 2015-2016: SIDERO-WT-2015.

07:00 EST 21st November 2018 | BioPortfolio

Summary of "In Vitro Activity of Cefiderocol, a Siderophore Cephalosporin, Against Gram-Negative Bacilli Isolated by Clinical Laboratories in North America and Europe in 2015-2016: SIDERO-WT-2015."

Cefiderocol (S-649266) is a parenteral siderophore cephalosporin currently in Phase III of clinical development. In this study, we determined the in vitro susceptibility of a 2015-2016 collection of 8,954 clinical isolates of Gram-negative bacilli (GNB), provided by 100 clinical laboratories in North America and Europe, to cefiderocol and comparators using the Clinical and Laboratory Standards Institute broth microdilution method. Iron-depleted cation-adjusted Mueller-Hinton broth was used to test cefiderocol. The concentration of cefiderocol inhibiting 90% of isolates (MIC) was 0.5 (North America; n=2,470) and 1 mg/L (Europe; n=3,543) for Enterobacteriaceae, 0.5 (North America; n=619) and 0.5 mg/L (Europe; n=921) for Pseudomonas aeruginosa, 1 (North America; n=308) and 2 mg/L (Europe; n=664) for Acinetobacter spp., 0.5 (North America; n=165) and 0.25 mg/L (Europe; n=175) for Stenotrophomonas maltophilia, and 0.12 (North America; n=40) and 0.5 mg/L (Europe; n=49) for Burkholderia cepacia complex spp. Cefiderocol MICs were ≤4 mg/L for 99.9% (6,005/6,013) of Enterobacteriaceae, 99.9% (1,539/1,540) of P. aeruginosa, 96.4% (937/972) of Acinetobacter spp., 99.4% (338/340) of S. maltophilia, and 94.4% (84/89) of Burkholderia cepacia complex spp. isolates tested. Against meropenem-nonsusceptible isolates, MICs to cefiderocol were ≤4 mg/L for 99.6% (245/246) of Enterobacteriaceae, 99.7% (394/395) of P. aeruginosa, 96.1% (540/562) of Acinetobacter spp., and 87.1% (27/31) of B. cepacia complex spp. We conclude that cefiderocol demonstrated potent in vitro activity (MIC, ≤4 mg/L) against the vast majority (99.4%, 8,903/8,954) of clinical isolates of GNB in a recent (2015-2016), multi-continent collection, including carbapenem-nonsusceptible isolates.

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This article was published in the following journal.

Name: International journal of antimicrobial agents
ISSN: 1872-7913
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Medical and Biotech [MESH] Definitions

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