Table 3 Antibiotic susceptibility test results of clinical bacterial isolates on MHA versus NA using CLSI zone size interpretative table HIPH, Alexandria, 2015–16
From: Evaluation of antibiotic susceptibility test results: how guilty a laboratory could be?
Antibiotic/clinical isolate | SIR agreement* | Very major error | Major error | Minor error |
|---|---|---|---|---|
No. (%) | No. (%) | No. (%) | No. (%) | |
P. aeruginosa (n = 49) | ||||
Ceftazidim (CAZ) | 46 (93.90) | 0 (0.00) | 3 (6.10) | 0 (0.00) |
Gentamicin (CN) | 38 (77.55) | 8 (16.30) | 2 (4.10) | 1 (2.00) |
Tobramycin (TOB) | 33 (67.30) | 10 (20.40) | 2 (4.10) | 4 (8.20) |
Piperacillin (PRL) | 24 (49.00) | 0 (0.00) | 1 (2.00) | 24 (49.00) |
Ciprofloxacin (CIP) | 36 (73.50) | 4 (8.20) | 2 (4.10) | 7 (14.30) |
Total | 177 (72.24) | 22 (8.98) | 10 (4.08) | 36 (14.70) |
Enterobacteriaceae (n = 50) | ||||
Ampicillin (AMP) | 50 (100.00) | 0 (0.00) | 0 (0.00) | 0 (0.00) |
Cefazolin (KZ) | 46 (92.00) | 0 (0.00) | 1 (2.00) | 3 (6.00) |
Gentamicin (CN) | 50 (100.00) | 0 (0.00) | 0 (0.00) | 0 (0.00) |
Tobramycin (TOB) | 47 (94.00) | 0 (0.00) | 0 (0.00) | 3 (6.00) |
Tazobactam-piperacillin (TZP) | 48 (96.00) | 0 (0.00) | 0 (0.00) | 2 (4.00) |
Total | 241 (96.40) | 0 (0.00) | 1 (0.40) | 8 (3.20) |
S. aureus (n = 50) | ||||
Azithromycin (AZM) | 43 (86.00) | 0 (0.00) | 3 (6.00) | 4 (8.00) |
Clindamycin (DA) | 41 (82.00) | 1 (2.00) | 0 (0.00) | 8 (16.00) |
Cefoxitine (FOX) | 33 (66.00) | 10 (20.00) | 7 (14.00) | 0 (0.00) |
Penicillin (P) | 44 (88.00) | 2 (4.00) | 4 (8.00) | 0 (0.00) |
Sulfamethoxazol-trimethoprim (SXT) | 33 (66.00) | 6 (12.00) | 1 (2.00) | 10 (20.00) |
Total | 194 (77.60) | 19 (7.60) | 15 (6.00) | 22 (8.80) |