TABLE 7.
PFGE profiles of ESBL-producing E. coli and K. pneumoniae based on CTX-M type
| Organism | CTX-M type | PFGE profilea |
|---|---|---|
| ESBL-producing E. coli (n = 229) | CTX-M-14 | 14E-1 (n = 2), 14E-2 (n = 2), 14E-3 (n = 2), 14E-NR (n = 92) |
| CTX-M-15 | 15E-1A (n = 9), 15E-1B (n = 4), 15E-1C (n = 3), 15E-1D (n = 3), 15E-1E (n = 2), 15E-2 (n = 4), 15E-3 (n = 3), 15E-4 (n = 2), 15E-NR (n = 56) | |
| CTX-M-27 | 27E-NR (n = 3) | |
| CTX-M-40 | 40E-NR (n = 1) | |
| CTX-M-55 | 55E-1A (n = 3), 55E-1B (n = 2), 55E-2 (n = 2), 55E-3 (n = 2), 55E-NR (n = 31) | |
| Non-CTX-M | XE-NR (n = 1) | |
| ESBL-producing K. pneumoniae | CTX-M-3 | 3K-1 (n = 2), 3K-NR (n = 2) |
| (n = 127) | CTX-M-14 | 14K-1A (n = 6), 14K-1B (n = 5), 14K-2A (n = 3), 14K-2B (n = 2), 14K-3 (n = 2), 14K-4 (n = 2), 14K-5 (n = 2), 14K-6 (n = 2), 14K-7 (n = 2), 14K-8 (n = 2), 14K-NR (n = 38) |
| CTX-M-15 | 15K-1A (n = 4), 15K-1B (n = 4), 15K-2A (n = 4), 15K-2B (n = 2), 15K-2C (n = 2), 15K-3A (n = 3), 15K-3B (n = 3), 15K-4 (n = 2), 15K-5 (n = 2), 15K-NR (n = 23) | |
| CTX-M-27 | 27K-NR (n = 1) | |
| CTX-M-55 | 55K-NR (n = 6) | |
| Non-CTX-M | XK-NR (n = 1) |
a
Isolates in each PFGE profile exhibited >80% similarity. PFGE profiles of the following clusters showed >60 to 80% similarity to each other: 15Ε-1Α, 15Ε-1Β, 15Ε-1Χ, 15Ε-1Δ, and 15Ε-1Ε; 55Ε-1Α and 55Ε-1Β; 14Κ-1Αand 14Κ-1Β; 14Κ-2Α and 14Κ-2Β; 15Κ-1Α and 15Κ-1Β; 15Κ-2Α, 15Κ-2Β, and 15Κ-2Χ; and 15Κ-3Α and 15Κ-3Β. ΝR, when in a PFGE profile, indicates a group of unrelated isolates with ≤60% similarity.