TABLE 2.
Identification system | No. of laboratories
|
|
---|---|---|
Routine usea | Occasional useb | |
Oxidase activity | 17 | |
Colony morphology | 17 | |
Pigmentation | 7 | |
Growth at 42°C | 11 | |
Colistin susceptibility | 4c | |
Previous culture history | 2 | |
Vitek 1 | 2 | 1 |
Vitek 2 | 3 | 3 |
API 20NE | 1d | 9e |
Fluorescence on centrimide agar | 1 | |
C390 susceptibility | 1 | 1 |
Chromogenic agar | 2 | |
Arginine hydrolysis | 1 | |
Fatty acid analysis | 1 | |
Molecular identification | 5 |
Routinely used to identify all potential P. aeruginosa isolates.
Occasionally used when isolates lacked typical phenotypic features of P. aeruginosa.
CLSI disk diffusion testing was performed in three laboratories, and CLSI agar dilution testing was used by one laboratory.
Routine API 20NE use was initiated during the course of the study.
Includes one laboratory which routinely used Vitek 2 for all potential isolates and API 20NE testing when atypical isolates arose.