Table 2 Gram-positive bacterial resistance and antibiotic effectiveness against the tested bacteria
Antibiotics | Category &inhibition zone (mm)a | Classification of Tested bacteria (S, I & R)b according to Inhibition zone (mm) | % Antibiotic effectiveness (AE)c | |||||
|---|---|---|---|---|---|---|---|---|
S | R | Staph pasteuri | Staph aureus | Bacillus cereus | Staph aureus (OSC) | S. pyogenes | ||
Ciprofloxacin (5µg) | (≥ 21) | (≤ 15) | S (22) | S (26) | S (26) | R (9) | R (0) | 60% |
Chloramphenicol(30µg) |  ≥ 18 |  ≤ 12 | S (20) | S (24) | I (14) | R (11) | S (22) | 60% |
Vancomycin(30µg) |  ≥ 12 |  ≤ 16 | S (12) | R (7) | R (8) | R (1) | R (2) | 20% |
Gentamicin (10 µg) |  ≥ 15 |  ≤ 12 | S (20) | S (22) | I (14) | S (16) | S (17) | 80% |
Oxacillin (1µg) |  ≥ 22 |  ≤ 21 | R (16) | R (8) | R (0) | R (0) | R(2) | 0% |
Azithromycin(15µg) |  ≥ 18 |  ≤ 13 | S (20) | R (0) | R (6) | R (0) | I (15) | 20% |
Rifampin (5µg) |  ≥ 20 |  ≤ 16 | R (8) | S (26) | R (2) | R (0) | R (4) | 20% |
Nitrofurantoin (300µg) |  ≥ 17 |  ≤ 14 | R (10) | S (18) | R (7) | R (0) | R (14) | 20% |
Trimethoprim (5µg) |  ≥ 16 |  ≤ 10 | S (18) | R (10) | R (0) | R (0) | R (0) | 20% |
Tetracycline (30 µg) |  ≥ 19 |  ≤ 14 | S (18) | S (17) | R (12) | R (0) | R (10) | 40% |
Clindamycin (2µg) |  ≥ 21 |  ≤ 14 | R (10) | R (4) | R (8) | R (0) | R (0) | 0% |
Linezolid (30µg) |  ≥ 21 |  ≤ 20 | R (12) | S (26) | R (16) | R (10) | R (6) | 20% |
MAR INDEXd | 0.42 | 0.42 | 0.75 | 0.92 | 0.75 | Â | ||