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Risk factors for polymyxin-resistant carbapenemase-producing Enterobacteriaceae in critically ill patients: An epidemiological and clinical study.

Abstract：

:This study aimed to assess the clinical impact and potential risk factors associated with polymyxin-resistant Enterobacteriaceae strains isolated from patients hospitalized in adult and neonatal intensive care units. A case-control study was conducted from September 2015 to January 2017. Antimicrobial susceptibility of polymyxin-resistant Enterobacteriaceae strains was determined by broth microdilution. The presence of resistance genes was evaluated by polymerase chain reaction and DNA sequencing. Renal failure [P=0.02, odds ratio (OR) 11.37, 95% confidence interval (CI) 1.0-128.63], use of a urinary catheter (P<0.01, OR 4.16, 95% CI 38.82-366.07), transfer between hospital units (P=0.03, OR 9.98, 95% CI 1.01-98.42), carbapenem use (P<0.01, OR 45.49, 95% CI 6.93-298.62) and surgical procedure (P<0.01, OR 16.52, 95% CI 2.83-96.32) were found to be risk factors for the acquisition of polymyxin-resistant strains in adult patients. For neonatal patients, use of a central venous catheter (P<0.01, OR 69.59, 95% CI 7.33-660.30) was the only risk factor associated with the acquisition of polymyxin-resistant strains. Analysis of the outcomes revealed that the mortality rate was significantly higher in adult (66.6%) and neonatal (23.5%) patients with polymyxin-resistant strains than in those with polymyxin-susceptible strains. In addition, carbapenem exposure (P<0.01, OR 50.93, 95% CI 2.26->999.999) was strongly associated with mortality. On the other hand, aminoglycoside use (P<0.03, OR 0.06, 95% CI 0.004-0.97) was a protective factor against mortality from polymyxin-resistant strains. Several risk factors were associated with polymyxin-resistant strains. The high mortality rates showed that acquisition of these strains is a predictor for unfavourable outcomes. Combination treatment with an aminoglycoside and polymyxin might be a better combination to improve patient outcomes.

journal_name

Int J Antimicrob Agents

journal_title

International journal of antimicrobial agents

authors

da Silva KE,Baker S,Croda J,Nguyen TNT,Boinett CJ,Barbosa LS,Tetila A,Simionatto S

doi

10.1016/j.ijantimicag.2020.105882

subject

Has Abstract

pub_date

2020-03-01 00:00:00

pages

105882

issue

3

eissn

0924-8579

issn

1872-7913

pii

S0924-8579(20)30021-2

journal_volume

55

pub_type

杂志文章

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