Table 2.
Distributions of aminoglycoside modifying enzyme-encoding genes in enterococci with high-level gentamicin resistance. Some isolates carried multiple aminoglycoside modifying enzyme-encoding genes.
| AME gene | Distribution of high-level gentamicin resistance in enterococci (n = 28) |
Total no. (%) of isolates | ||
|---|---|---|---|---|
| E. faecium (n = 19) | E. faecalis (n = 7) | E. avium (n = 2) | ||
| aac(6′)-Ie-aph(2″)-Ia | 18 | 5 | 2 | 25 (89.3%) |
| aph(2″)-Ib | – | – | – | – |
| aph(2″)-Ic | – | 2 | – | 2 (7.1%) |
| aph(2″)-Id | 2 | – | 1 | 3 (10.7%) |
| aph(3′)-IIIa | 6 | 1 | – | 7 (25.0%) |
| aac(6′)-Ie-aph(2″)-Ia + aph(2″)-Ic | – | 2 | – | 2 (7.1%) |
| aac(6′)-Ie-aph(2″)-Ia + aph(2″)-Id | 2 | – | 1 | 3 (10.7%) |
| aac(6′)-Ie-aph(2″)-Ia + aph(3′)-IIIa | 6 | – | – | 6 (21.4%) |