TABLE 1.
Overview of different resistance genes, showing the antibiotic class and number of isolates for each resistance gene according to the phylogenetic clustering
| Resistance gene | Antibiotic class | No. (%) of isolates |
|
|---|---|---|---|
| MRSA clade (n = 53) | MSSA-dominated clade (n = 96) | ||
| tet(K) | Tetracycline | 10 (19) | 28 (29) |
| cat(pC233) | Phenicol | 6 (11) | 0 |
| cat(pC221) | Phenicol | 1 (2) | 5 (5) |
| blaZ | Beta-lactam | 49 (92) | 88 (92) |
| mecA, SCCmec type | Beta-lactam | 53 (100), V(5C2&5)a | 3 (3), IV, V(5C2), XIII |
| aac(6′)-aph(2″) | Aminoglycoside | 2 (2) | 51 (96) |
| aadD | Aminoglycoside | 0 | 10 (19) |
| aph(3′)-III | Aminoglycoside | 1 (1) | 0 |
| str | Aminoglycoside | 3 (3) | 0 |
| dfrG | Trimethoprim | 18 (19) | 0 |
| fusB | Fusidic acid | 1 (1) | 0 |
| msr(A) | Macrolide, lincosamide, streptogramin B | 1 (1) | 0 |
| lnu(A) | Macrolide, lincosamide, streptogramin B | 0 | 8 (15) |
| erm(C) | Macrolide, lincosamide, streptogramin B | 2 (2) | 2 (4) |
a
Four isolates only had one ccrC1 gene equivalent to an SCCmec type V(5C2).