Antibiotics | MIC Range (μg/ml) | N (%) | Susceptible n (%) | Intermediate n(%) | Resistant/Non-susceptible* n(%) | Serotypes, Total S. agalactiae = 83 (% based on MIC group) | |||||
---|---|---|---|---|---|---|---|---|---|---|---|
Ia, n = 18 | Ib, n = 11 | II, n = 30 | III, n = 5 | IV, n = 1 | V, n = 18 | ||||||
Penicillin | ≤0.03 | 4 (4.82) | 83 (100) |  |  |  | 3 (75) | 1 (25) |  |  |  |
0.06 | 47 (56.6) | 6 (12.8) | 22 (46.8) | 4 (8.5) | Â | 9 (19.2) | 6 (12.8) | ||||
0.12 | 32 (38.6) | 12 (37.5) | 5 (15.6) | 5 (15.6) | Â | 1 (3.1) | 9 (28.1) | ||||
Cefotaxime | ≤0.12 | 81 (97.6) | 83 (100) |  |  | 17 (20.9) | 11 (13.6) | 29 (35.8) | 5 (6.2) | 1 (1.2) | 18 (22.2) |
0.25 | 2 (2.4) | 1 (50) | Â | 1 (50) | Â | Â | Â | ||||
Levofloxacin | ≤0.5 | 8 (9.6) | 79 (95.2) |  |  |  | 1 (12.5) | 4 (50) | 2 (25) | 1 (12.5) |  |
1 | 66 (79.5) | 16 (24.2) | 10 (15.2) | 22 (33.3) | 3 (4.5) | Â | 15 (22.7) | ||||
2 | 5 (6.0) | 2 (40) | Â | 3 (60) | Â | Â | Â | ||||
> 4 | 4 (4.8) | 4 (4.8) |  |  | 1 (25) |  |  | 3 (75) | |||
Tetracycline | ≤1 | 10 (12) | 10 (12) |  |  | 8 (80) | 2 (20) |  |  |  |  |
> 8 | 73 (88) |  |  | 73 (88) | 10 (13.7) | 9 (12.3) | 30 (41.1) | 5 (6.9) | 1 (1.4) | 18 (24.6) | |
Clindamycin | ≤0.12 | 78 (98.8) | 78 (94) |  |  | 18 (23.1) | 11 (14.1) | 30 (38.5) | 4 (5.1) | 1 (1.3) | 14 (17.9) |
32 | 5 (1.2) | Â | 5 (6)a | Â | Â | Â | 1 (20) | Â | 4 (80)d | ||
Erythromycin | ≤0.25 | 78 (90.2) | 78 (94) |  |  | 18 (23.1) | 11 (14.1) | 30 (38.5) | 4 (5.1) | 1 (1.3) | 14 (17.9) |
0.5 | 1 (0.83) | Â | 1 (1.2) | Â | Â | Â | Â | 1 (100)c | Â | Â | |
2 | 3 (4.1) | Â | Â | Â | Â | Â | Â | Â | Â | 3 (100) | |
> 32 | 1 (0.83) |  |  | 4 (4.8) |  |  |  |  |  | 1 (100) | |
Daptomycin | ≤1 | 80 (96.4) | 80 (96.4) |  |  | 18 (22.5) | 10 (12.5) | 28 (35) | 5 (6.2) | 1 (1.3) | 18 (22.5) |
> 1 | 3 (3.6) |  |  | 3 (3.6)b |  | 1 (33.3) | 2 (66.7) |  |  |  | |
Vancomycin | ≤0.5 | 53 (63.9) | 83 (100) |  |  | 12 (22.6) | 6 (11.3) | 17 (32.1) | 3 (5.7) | 1 (1.9) | 14 (26.4) |
1 | 30 (36.1) | Â | Â | 6 (20) | 5 (16.7) | 13 (43.3) | 2 (6.7) | Â | 4 (13.3) | ||
Linezolid | ≤2 | 83 (100) | 83 (100) |  |  | 18 (21.7) | 11 (13.3) | 30 (36.1) | 5 (6) | 1 (1.2) | 18 (21.7) |