Table 3.
Characteristics of isolates carrying integrons.
| Isolate | Class 1 integrons |
||||
|---|---|---|---|---|---|
| Size (bp) | Gene cassette | Typea | qacEΔ1-sul1 | Classic or non-classicb | |
| PM1 | 1664 | dfrA17-aadA5 | I | + | Classic |
| PM4 | 2900 | dfrA32-ereA-aadA2 | IV | - | Non-classic |
| PM7 | 721 | dfrA5 | II | + | Classic |
| PM9 | 1664 | dfrA17-aadA5 | I | + | Classic |
| PM13 | 1664 | dfrA17-aadA5 | I | + | Classic |
| PM19 | 792 | aadA2 | V | - | Non-classic |
| PM21 | 1163 | dfrA1-orfC | III | + | Classic |
| PM24 | 721 | dfrA5 | II | + | Classic |
| PM35 | 1664 | dfrA17-aadA5 | I | + | Classic |
| PM39 | 1664 | dfrA17-aadA5 | I | + | Classic |
aType I-V represented five different integron structures in our study (Figure 2).
bIn this study, class 1 integrons with qacEΔ1 and sul1 genes in their 3′-CS were named as classic class 1 integrons. Accordingly class 1 integrons without the normal 3′-CS were named as non-classic class 1 integrons.