TABLE 2.
β-Lactam resistance phenotypes of 520 nonduplicate P. mirabilis strains resistant to amoxicillin
| Phenotypeb | Resistancea toc:
|
Synergy test result | No. (%) of strains | ||||
|---|---|---|---|---|---|---|---|
| AMX | AMC | TIC | TCC | CF | |||
| Penicillinase | R | S/I | S/I/R | S | S/I | − | 407 (78.3) |
| ESBL | R | S/I | R | S | R | + | 74 (14.2) |
| IRT/OXA | R | R | S/I | S/I | S | − | 39 (7.5) |
a
S, susceptible; I, intermediate; R, resistant; S/I, susceptible or intermediate; S/I/R, susceptible, intermediate, or resistant. Based on the recommendations of the Antibiogram Committee of the French Society for Microbiology (2).
b
See phenotype definitions in Materials and Methods.
c
AMX, amoxicillin; AMC, amoxicillin-clavulanate; TIC, ticarcillin; TCC, ticarcillin-clavulanate; CF, cephalothin.