TABLE 2.
Accuracy of bioluminescent antimicrobial susceptibility assay by species
| Species | No. of isolates | No. of observationsa
|
% Correctb
|
Accuracy | Tc | ||
|---|---|---|---|---|---|---|---|
| S | R | S | R | ||||
| Citrobacter freundii | 2 | 7 | 5 | 100 | 100 | 100 | −0.679 |
| Citrobacter koseri | 1 | 4 | 1 | 100 | 100 | 100 | −0.762 |
| Coagulase-negative Staphylococcus | 2 | 6 | 3 | 100 | 67 | 83 | −0.392 |
| E. coli | 48 | 227 | 59 | 98 | 95 | 97 | −0.451 |
| Enterobacter cloacae | 3 | 9 | 8 | 78 | 100 | 89 | −1.350 |
| Enterococcus spp. | 6 | 16 | 14 | 88 | 79 | 83 | −0.316 |
| Klebsiella oxytoca | 2 | 10 | 2 | 100 | 100 | 100 | −0.534 |
| Klebsiella pneumoniae | 14 | 55 | 19 | 87 | 68 | 78 | −0.455 |
| Proteus mirabilis | 3 | 12 | 6 | 83 | 50 | 67 | −0.278 |
| Providentia stuartii | 1 | 0 | 5 | ||||
| Staphylococcus aureus | 3 | 12 | 6 | 92 | 33 | 63 | −0.011 |
| Serratia marcescens | 1 | 3 | 3 | 100 | 67 | 83 | −0.928 |
a
Number of observations containing antibiotic-susceptible (S) or antibiotic-resistant (R) organisms.
b
Calculated by dividing the number of specimens predicted correctly by the number tested.
c
T, threshold log RLU different from control result without antibiotics.