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- W4280521470 abstract "Background:Acinetobacter baumannii can cause difficult-to-treat infections because it can acquire extensive antimicrobial resistance mechanisms. We aim to describe the antimicrobial resistance pattern and the genetic basis of carbapenem-nonsusceptible A. baumannii isolates in a University Hospital in Romania, a country where multidrug-resistant A. baumannii is widespread. Methods: We collected 104 consecutive meropenem-nonsusceptible A. baumannii isolates from 104 patients (36% female, mean age [SD] of 63 [16] years) between May 2015 and August 2017 from a large tertiary center in Romania. Whole-genome sequencing of representative isolates from amplified fragment length polymorphism clusters was used to determine clonality and resistance patterns. Results: All isolates were resistant to piperacillin/tazobactam, ceftazidime, and ciprofloxacin; 88.5% to gentamicin; and 90.4% to trimethoprim/sulfamethoxazole. In contrast, 79.8% and 99.0% were susceptible to tobramycin and colistin, respectively. The only isolate resistant to colistin had an minimum inhibitory concentration (MIC) of ≥16 mg/L. The blaOXA-24 gene was detected in 79.1% and blaOXA-23 in 20.9% of the isolates. In one isolate, blaOXA-23 was copresent with blaOXA-24. ST502 (Oxford scheme) was the most prevalent sequence type and was exclusively associated with blaOXA-24. Conclusions: ST502 associated with blaOXA-24 was frequently observed in the region where carbapenem-nonsusceptible A. baumannii was found to be endemic. In these isolates, tobramycin and colistin might be the remaining therapeutic options. Due to differences in gentamicin and tobramycin resistance in these isolates, surveillance data should not group gentamicin, tobramycin, and amikacin together as aminoglycosides." @default.
- W4280521470 created "2022-05-22" @default.
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- W4280521470 date "2022-06-01" @default.
- W4280521470 modified "2023-09-27" @default.
- W4280521470 title "High Prevalence of ST502 Carrying an OXA-24 Carbapenemase gene in Carbapenem-Nonsusceptible <i>Acinetobacter baumannii-calcoaceticus</i> Isolates in Romania" @default.
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- W4280521470 doi "https://doi.org/10.1089/mdr.2021.0274" @default.
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