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. 2021 Sep 17;65(10):e01274-21. doi: 10.1128/AAC.01274-21

TABLE 1.

Phenotypic and genotypic profiles of three clinical carbapenem-resistant P. aeruginosa isolates harboring OXA-10-like β-lactamases, evaluated in vivo

Organism Genotype MLSTh MIC (mg/liter)
Ceftazidime Cefepime Ceftolozane-tazobactam Ceftazidime-avibactam Imipenem Meropenem
PSA INT-7-65 blaOXA-56,ablaOXA-50b (OXA-904 by BLAST), blaOXA-392c, blaPAO (blaPDC-117) 260 4d 32f 4 4 16 32
PSA INT-9-5 blaOXA-35,ablaOXA-488,bblaPAO (blaPDC-35) 235 4d 32f 2 2 32 >64
PSA INT-9-11 blaOXA-10,ablaOXA-488,bblaPAO (blaPDC-35) 235 8e 64g 8 4 16 64
a

blaOXA-10-like family. For PSA INT-7-65, blaOXA-56 could not be distinguished from blaOXA-101.

b

blaOXA-50-like family. For PSA INT-7-65, blaOXA-50 could not be distinguished from blaOXA-396 or blaOXA-494.

c

blaOXA-1-like family.

d

Ceftazidime 2 g q8h 2-h infusion HSR, 100% fT > MIC (9).

e

Ceftazidime 2 g q8h 2-h infusion HSR, 87% fT > MIC (9).

f

Cefepime 2 g q8h 2-h infusion HSR, 38% fT > MIC; cefepime 1 g q8h 2-h infusion HSR, 8% fT > MIC (10).

g

Cefepime 2 g q8h 2-h infusion HSR, 8% fT > MIC; cefepime 1 g q8h 2-h infusion HSR, 0% fT > MIC (10).

h

MLST, multilocus sequence type.