Table 2

Minimum inhibitory concentration (MIC) tests to show antimicrobial resistance of Pseudomonas aeruginosa in companion animal (n=24) and human (n=37) isolates to polymyxin antimicrobials

IsolateAntimicrobialResistance breakpoint
(mg/l)
Resistant strains
(n)
Resistant strains
(%)
MIC50
(mg/l)
MIC90
(mg/l)
AnimalPolymyxin B≥822921632
AnimalColistin>2135448
HumanPolymyxin B≥82568816
HumanColistin>282224