Table 1.
Drug resistance rate and susceptibility rate of BLPAR and BLNAR strains to antibiotics.
| Antimicrobial | BLPARa (n = 79) | BLNARb (n = 18) | Total (n = 196) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Number of resistant strains | Resistance rate (%)* | Sensitivity rate (%)* | Number of resistant strains | Resistance rate (%)* | Sensitivity rate (%)* | χ2 | P | Resistance rate (%)* | Sensitivity rate (%)* | |
| Ampicilin | 79 | 100 | 0 | 18 | 100 | 0 | – | – | 71.4 | 22.9 |
| Ceftazidime | 3 | 3.8 | 91.1 | 1 | 5.6 | 94.4 | 0.000 | >0.05 | 2 | 98 |
| Amoxilin-clavulanate | 0 | 0 | 100 | 18 | 100 | 0 | 90.496 | < 0.05 | 26 | 73.5 |
| Meropenem | 0 | 0 | 100 | 1 | 5.6 | 94.4 | 0.661 | >0.05 | 0.5 | 99.5 |
| Levofloxacin | 0 | 0 | 100 | 1 | 5.6 | 94.4 | 0.661 | >0.05 | 0.5 | 99.5 |
| Imipenem | 0 | 0 | 100 | 1 | 5.6 | 94.4 | 0.661 | >0.05 | 0.5 | 99.5 |
| Tetracycline | 20 | 25.3 | 60.8 | 5 | 27.8 | 44.4 | 0.102 | >0.05 | 25.5 | 64.8 |
| Chloramphenicol | 7 | 8.9 | 70.9 | 1 | 5.6 | 61.1 | 0.000 | >0.05 | 6.6 | 91.4 |
| Ampicilin-sulbactam | 12 | 15.2 | 82.3 | 17 | 94.4 | 5.6 | 42.782 | < 0.05 | 32.7 | 65.3 |
| Aztreonam | 9 | 11.4 | 87.3 | 5 | 27.8 | 72.2 | 1.930 | >0.05 | 13.3 | 86.2 |
| Cefepime | 0 | 0 | 100 | 0 | 0 | 100 | – | – | 0.5 | 99 |
| Rifampin | 8 | 10.1 | 65.8 | 6 | 33.3 | 50 | 4.001 | < 0.05 | 13.8 | 72.9 |
| Cefaclor | 24 | 30.4 | 60.8 | 12 | 66.7 | 33.3 | 6.667 | < 0.05 | 36.7 | 54.6 |
| Azithromycin | 48 | 60.8 | 38 | 1 | 5.6 | 94.4 | 18.342 | < 0.05 | 34.2 | 65.3 |
a
BLPAR: isolates which were β-lactamase positive, ampicillin resistant.
b
BLNAR: isolates which were β-lactamase negative, ampicillin resistant.
*
Some antimicrobial susceptibility rate add resistance rate < 100% is indicated in the table, mediating strain susceptibility to this antimicrobial agent.