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Analysis of the blaCTX-M upstream DNA region
| Type of blaCTX-M | IS element | Size of intergenic spacer region between ISEcp1 and blaCTX-M (bp) | No. of isolates |
|---|---|---|---|
| CTX-M-3 | ISEcp1 | 127 | 4 |
| CTX-M-14 | ISEcp1 | 42 | 164 |
| CTX-M-14 | IS10-interrupting ISEcp1 | 42 | 2 |
| CTX-M-15 | ISEcp1 | 48 | 121 |
| CTX-M-15 | IS26-interrupting ISEcp1 | 48 | 9 |
| CTX-M-15 | IS903-interrupting ISEcp1 | 48 | 5 |
| CTX-M-27 | ISEcp1 | 42 | 4 |
| CTX-M-40 | ISEcp1 | 66 | 1 |
| CTX-M-55 | ISEcp1 | 48 | 47 |
