Table 1.
Antibiotic resistance patterns of Streptococcus pneumoniae strains isolated from children in Ardabil, Iran, using agar diffusion method
| Antibiotics | Total isolates (N = 43), n (%) | Genotypes | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| mef A/E (N=32), n(%) | erm B + mef A/E (N= 26), n(%) | P | ||||||||
| S | I | R | S | I | R | S | I | R | ||
| Erythromycin | 11(25.6) | - | 32(74.4) | - | - | 32 (100) | - | - | 26 (100) | 1 |
| Azithromycin | 11(25.6) | 1(2.3) | 31(72.1) | 3 (9.38) | - | 29(90.62) | 3 (11.53) | - | 23(88.46) | 0.8 |
| Clindamycin | 31(72.1) | - | 12(27.9) | 20 (62.5) | - | 12(37.5) | 15(57.70) | - | 11(42.3) | 0.65 |
| Tetracycline | 25(58.4) | - | 18(41.86) | 16 (50) | - | 16(50) | 11(42.30) | - | 15(57.70) | 0.44 |
| Levofloxacin | 43(100) | - | - | - | - | - | - | - | - | |
| Trimethoprim | 7(16.3) | 1(2.3) | 35(81.4) | 5 (15.62) | - | 27(84.37) | 4(15.39) | - | 22(84.61) | 0.9 |
| Chloramphenicol | 36(83.7) | - | 7(16.3) | 27(84.37) | - | 5(15.62) | 22(84.61) | - | 4(15.38) | 0.8 |
| Penicillin1 | 2(4.65) | - | 41(95.34) | - | - | 32(100) | - | 26 (100) | 1 | |
| Vancomycin | 43(100) | - | - | - | - | - | - | - | - | |
| Rifampin | 41(95.34) | 2(4.6) | - | - | - | - | - | - | - | |
S; Susceptible, I; Intermediate, R, Resistant
1
Determined using oxacillin disk, 1μg