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. 2020 May 15;3:241. doi: 10.1038/s42003-020-0966-5

Table 2.

Zone of clearance (mm) and phenotypic resistance determination for clinical Pseudomonas aeruginosa isolates.

Pa-3 Pa-8 ATCC 27853
Antibiotic Kirby–Bauer (mm) Interpretation Kirby–Bauer (mm) Interpretation Kirby–Bauer (mm)
Delafloxacin 6 Resistant 6 Resistant 23–29
Ceftazidime 6 Resistant 6 Resistant 22–29
Cefepime 6 Resistant 6 Resistant 25–31
Meropenem 6 Resistant 6 Resistant 27–33
Imipenem 6 Resistant 25 Sensitive 20–28
Piperacillin/tazobactam 24 Sensitive 19 Intermediate 25–33
Ceftolozane/tazobactam 6 Resistant 29 Sensitive 25–31
Ceftazidime/avibactam 6 Resistant 26 Sensitive 25–31
Ciprofloxacin 6 Resistant 6 Resistant 25–33
Levofloxacin 6 Resistant 6 Resistant 19–26
Gentamicin 6 Resistant 6 Resistant 17–23
Amikacin 6 Resistant 17 Sensitive 18–26
Trimethoprim/sulfamethoxazole 6 NA 6 NA
Fosfomicin 12 Resistant 15 Intermediate
Colistin 13 Sensitive 15 Sensitive 11–17
Aztreonam 17 Intermediate 16 Intermediate 23–29
Doxycycline 6 NA 6 NA
Minocycline 6 NA 6 NA
Tigecycline 6 NA 6 NA 9–13
Nitrofurantoin 6 NA 6 NA
Carbapenem inactivation assay 14 Positive 27 Positive

NA indicates that no interpretive criteria have been established. ATCC 27853 values are disk diffusion QC ranges provided by the CLSI63.