Table 3.
Comparison of biofilm formation in antibiotic-resistant K. pneumoniae strains.
| Antibiotics | Strength of biofilm formation | ||||||
|---|---|---|---|---|---|---|---|
| Number | Negative | Poor | Moderate | Strong | P value | ||
| Ampicillin-sulbactam | Resistant | 54 | 10 | 17 | 15 | 12 | 0.038 |
| Susceptible | 8 | 5 | 2 | 0 | 1 | ||
|
| |||||||
| Cefotaxime | Resistant | 12 | 4 | 5 | 0 | 3 | <0.001 |
| Susceptible | 1 | 0 | 1 | 0 | 0 | ||
|
| |||||||
| Ceftazidime | Resistant | 45 | 10 | 15 | 11 | 9 | <0.001 |
| Susceptible | 11 | 5 | 4 | 1 | 1 | ||
|
| |||||||
| Ceftriaxone | Resistant | 11 | 4 | 2 | 2 | 3 | <0.001 |
| Susceptible | 1 | 1 | 0 | 0 | 0 | ||
|
| |||||||
| Piperacillin-tazobactam | Resistant | 45 | 11 | 20 | 7 | 7 | <0.001 |
| Susceptible | 3 | 1 | 2 | 0 | 0 | ||
|
| |||||||
| Tobramycin | Resistant | 41 | 8 | 16 | 8 | 9 | 0.035 |
| Susceptible | 7 | 5 | 1 | 1 | 0 | ||
|
| |||||||
| Ciprofloxacin | Resistant | 62 | 14 | 19 | 17 | 12 | <0.001 |
| Susceptible | 14 | 5 | 7 | 0 | 2 | ||
|
| |||||||
| Levofloxacin | Resistant | 35 | 9 | 11 | 10 | 5 | <0.001 |
| Susceptible | 6 | 3 | 3 | 0 | 0 | ||
|
| |||||||
| Trimethoprim-sulfamethoxazole | Resistant | 8 | 4 | 5 | 0 | 3 | <0.001 |
| Susceptible | 15 | 5 | 4 | 5 | 1 | ||
|
| |||||||
| Imipenem | Resistant | 39 | 9 | 15 | 10 | 5 | <0.001 |
| Susceptible | 22 | 10 | 7 | 1 | 4 | ||
|
| |||||||
| Meropenem | Resistant | 36 | 8 | 14 | 9 | 5 | <0.001 |
| Susceptible | 15 | 6 | 5 | 1 | 3 | ||
|
| |||||||
| Gentamicin | Resistant | 14 | 3 | 8 | 2 | 1 | <0.001 |
| Susceptible | 7 | 3 | 2 | 0 | 2 | ||
|
| |||||||
| Amikacin | Resistant | 44 | 5 | 16 | 10 | 13 | 0.024 |
| Susceptible | 19 | 10 | 5 | 1 | 3 | ||
|
| |||||||
| Nitrofurantoin | Resistant | 4 | 3 | 1 | 0 | 0 | <0.001 |
| Susceptible | 3 | 2 | 1 | 0 | 0 | ||