Table 3.

Pseudomonas aeruginosa susceptibility among ICU lower respiratory tract isolates stratified by frequency of carbapenem resistance.

Antibiotic	CR group 1 (N = 37) (n = 264, %)	CR group 2 (N = 25) (n = 363, %)	CR group 3 (N = 18) (n = 244, %)
Cefepime	83.7	74.9	63.1
Piperacillin/tazobactam	79.6	68.9	52.9
Meropenem	91.3	73.6	47.5
Levofloxacin	68.6	66.1	48
Ceftolozane/tazobactam	96.6	94.2	90.6
Imipenem/relebactam	98.1	91.7	81.6

CR group 1 = CR P. aeruginosa rates ⩽20%; CR group 2 = 21–40%; CR group 3 = ⩾41%.

CR, carbapenem resistant; ICU, intensive care unit; N, number of institutions; n, number of isolates.