Table 3 Relation between the concentrations of AgNPs and MIC values of antibiotics among ESBL producing E. coli isolates
Antibiotics (MICs) | MIC of silver in combination | |||
|---|---|---|---|---|
Ag/2 | Ag/4 | Ag/8 | Ag/16 | |
No. (%) | No. (%) | No. (%) | No. (%) | |
Ampicillin | ||||
S (≤ 8 µg/ml) | 30 (85.71%) | 28 (80.00%) | 5 (14.29%) | 0 (00.00%) |
I (= 16 µg/ml) | 4 (11.43%) | 6 (17.14%) | 25 (71.42%) | 3 (8.57%) |
R (≥ 32 µg/ml) | 1 (2.86%) | 1 (2.86%) | 5 (14.29%) | 32 (91.43%) |
Cefotaxime | ||||
S (≤ 1 µg/ml) | 32 (91.43%) | 30 (85.71%) | 6 (17.14%) | 0 (00.00%) |
I (= 2 µg/ml) | 3 (8.57%) | 5 (14.29%) | 24 (68.57%) | 9 (25.71%) |
R (≥ 4 µg/ml) | 0 (00.00) | 0 (00.00%) | 5 (14.29%) | 26 (74.29%) |
Ceftazidime | ||||
S (≤ 4 µg/ml) | 31 (88.57%) | 30 (85.71%) | 4 (11.43%) | 0 (0.00%) |
I (= 8 µg/ml) | 4 (11.43%) | 5 (14.29%) | 25 (71.43%) | 6 (17.14%) |
R (≥ 16 µg/ml) | 0 (00.00%) | 0 (00.00%) | 6 (17.14%) | 29 (82.86%) |
Ciprofloxacin | ||||
S (≤ 0.06 µg/ml) | 32 (91.43%) | 31 (88.57%) | 6 (17.14%) | 0 (00.00%) |
I (0.12–0.5 µg/ml) | 3 (8.57%) | 4 (11.43%) | 26 (74.29%) | 8 (22.86%) |
R (≥ 1 µg/ml) | 0 (00.00%) | 0 (0.00%) | 3 (8.57%) | 27 (77.14%) |