Table 1.
IncX replicons among 198 carbapenem-resistant Enterobacteriaceae isolates.
| IncX subtypea | Number of isolates (% by column), according to carbapenemase type |
|||
|---|---|---|---|---|
| NDM (n = 62) | Other carbapenemases (n = 47) | None (n = 89) | Total (n = 198) | |
| X1 | 2 (3.2) | - | - | 2 (1.0) |
| X3 | 44 (71.0) | 9 (19.1) | 3 (3.4) | 56 (28.3) |
| X4 | - | - | 2 (2.2) | 2 (1.0) |
| X3 and X4 | 3 (4.8) | 1 (2.1) | - | 4 (2.0) |
| Total | 49 (79.0) | 10 (21.3)b | 5 (5.6) | 64 (32.3) |
aNo X2 and X5 replicons were detected. bX3 replicon was detected in isolates producing OXA-181 (n = 5), OXA-232 (n = 4), and KPC-2 (n = 1). One of the OXA-181 producers was also positive for the X4 subtypes.