TABLE 4.
Susceptibility testing results of false-positive lactose-fermenting isolates identified by method 1 and method 2 in surveillance swab specimensc
| Method | Ertapenem (n [%]) |
Imipenem (n [%]) |
Meropenem (n [%]) |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MIC range | S | I | R | MIC range | S | I | R | MIC range | S | I | R | |
| 1 (n = 60)a | <0.015-0.5 | 60 (100) | 0 (0) | 0 (0) | 0.06-1 | 60 (100) | 0 (0) | 0 (0) | <0.015-0.125 | 60 (100) | 0 (0) | 0 (0) |
| 2 (n = 11)b | 0.125-16 | 6 (55) | 1 (9) | 4 (36) | 0.125-4 | 11 (100) | 0 (0) | 0 (0) | 0.06-4 | 11 (100) | 0 (0) | 0 (0) |
a
Sixty of 68 lactose-fermenting isolates were available for testing. These included 42 Escherichia coli, 16 Klebsiella pneumoniae, 1 Citrobacter freundii complex, and 1 Enterobacter cloacae isolate.
b
Eleven of 13 lactose-fermenting isolates were available for testing. All were identified as Escherichia coli.
c
S, susceptible; I, intermediate; R, resistant.