scholarly journals Use of whole-genome sequencing to trace, control and characterize the regional expansion of extended-spectrum β-lactamase producing ST15 Klebsiella pneumoniae

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Kai Zhou ◽  
Mariette Lokate ◽  
Ruud H. Deurenberg ◽  
Marga Tepper ◽  
Jan P. Arends ◽  
...  
2017 ◽  
Vol 61 (9) ◽  
Author(s):  
Ghady Haidar ◽  
Cornelius J. Clancy ◽  
Liang Chen ◽  
Palash Samanta ◽  
Ryan K. Shields ◽  
...  

ABSTRACT We determined imipenem, imipenem-relebactam, ceftazidime, and ceftazidime-avibactam MICs against 100 CRE isolates that underwent whole-genome sequencing. Klebsiella pneumoniae carbapenemases (KPCs) were the most common carbapenemases. Forty-six isolates carried extended-spectrum β-lactamases (ESBLs). With the addition of relebactam, imipenem susceptibility increased from 8% to 88%. With the addition of avibactam, ceftazidime susceptibility increased from 0% to 85%. Neither imipenem-relebactam nor ceftazidime-avibactam was active against metallo-β-lactamase (MBL) producers. Ceftazidime-avibactam (but not imipenem-relebactam) was active against OXA-48-like producers, including a strain not harboring any ESBL. Major OmpK36 porin mutations were independently associated with higher imipenem-relebactam MICs (P < 0.0001) and showed a trend toward independent association with higher ceftazidime-avibactam MICs (P = 0.07). The presence of variant KPC-3 was associated with ceftazidime-avibactam resistance (P < 0.0001). In conclusion, imipenem-relebactam and ceftazidime-avibactam had overlapping spectra of activity and niches in which each was superior. Major OmpK36 mutations in KPC-K. pneumoniae may provide a foundation for stepwise emergence of imipenem-relebactam and ceftazidime-avibactam resistance.


2019 ◽  
Vol 78 (3) ◽  
pp. 187-199 ◽  
Author(s):  
Melanie D. Spencer ◽  
Kathryn Winglee ◽  
Catherine Passaretti ◽  
Ashlee M. Earl ◽  
Abigail L. Manson ◽  
...  

2015 ◽  
Vol 21 (11) ◽  
pp. 1001-1007 ◽  
Author(s):  
Y. Jiang ◽  
Z. Wei ◽  
Y. Wang ◽  
X. Hua ◽  
Y. Feng ◽  
...  

2019 ◽  
Vol 25 (8) ◽  
pp. 1127-1131 ◽  
Author(s):  
Bruna Fuga ◽  
Sabrina Royer ◽  
Paola Amaral de Campos ◽  
Melina Lorraine Ferreira ◽  
Iara Rossi ◽  
...  

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