TABLE 4.
Technical characteristics of BYG Carba test, β Carba test, Rapidec Carba NP test, and Neo-Rapid Carb screen kit
| Characteristic | Results fora: |
|||
|---|---|---|---|---|
| BYG | BCT | RCNP | NRCK | |
| Validated group of isolates (or recommended by manufacturer) | Enterobacteriaceae | Enterobacteriaceae | Enterobacteriaceae | Enterobacteriaceae |
| P. aeruginosa | P. aeruginosa | P. aeruginosa | ||
| A. baumannii | ||||
| Maximal incubation time (min) | 60 | 30 | 160 | 90 |
| Total hands-on time (min) | 5 | 2 | 4 | 6 |
| No. of handling steps | 1 | 1 | 3 | 2 |
| Ease of use | Easy, little training required | Very easy, no training required | Easy, little training required | Easy, little training required |
| Catalog price per unit test in Belgium | Not commercially available | 6.6 USDb | 8.8 USD | 2.4 USD |
| Positive criteria | Signal attaining a fixed cutoff | Orange, red, purple | Orange-red to yellow, with a red negative control | Orange to yellow, with a red negative control |
| Overall doubtful results (%)c | 0 | 3 | 9.1 | 4.9 |
| Overall noninterpretable resultsc | NRd | NR | 0.3 | 3.4 |
| Overall reproducibility (%)e | 95 | 85 | 100 | 90 |
a
BYG, BYG Carba test, BCT, β Carba test, RCNP, Rapidec Carba NP test, NRCK, Neo-Rapid CARB screen kit.
b
USD, U.S. dollars.
c
Proportion of doubtful and noninterpretable results among all tested isolates.
d
NR, not reportable as no internal negative control is provided with the test.
e
Proportion of isolates showing full agreements when tested in triplicate in a reproducibility evaluation (total n = 20).