Organism | Susceptibility to polymyxins | Resistance mechanism | Isolates | Rapid ResaPolymyxin Acinetobacter/Pseudomonas NP test | Sensitivity | Specificity |
---|---|---|---|---|---|---|
A. baumannii | Resistant | Mediated by chromosomea | 8 (3.16%) | 8 positive result | 100% | 96% |
Susceptible | 50 (19.76%) | 48 negative results and 2 positive result | ||||
P. aeruginosa | Resistant | Mediated by chromosome | 11 (4.35%) | 11 positive result | 100% | 100% |
Susceptible | 50 (19.76%) | 50 negative results | ||||
K. pneumoniae | Resistant | Mediated by chromosomea | 20 (7.91%) | 20 positive result | 100% | 100% |
Susceptible | 50 (19.76%) | 50 negative results | ||||
E. coli | Resistant | Mediated by plasmid | 14 (5.54%) | 2 positive result | 100% | 100% |
Susceptible | 50 (19.76%) | 50 negative results |