TABLE 7.
Relationship between biofilm formation and antimicrobial resistancea
| Antibiotic |
E. coli (8) |
K. pneumoniae (7) |
P. mirabilis (8) |
P. aeruginosa (7) |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MIC (n) | p50 | P value | MIC (n) | (p50) | P value | MIC (n) | p50 | P value | MIC (n) | p50 | P value | |||||
| Amikacin | S | 8 | 2.1 | S | 5 | 3.9 | 0.44 | S | 8 | 3.3 | S | 6 | 7.81 | 0.61 | ||
| R | 0 | R | 2 | 3.36 | R | 0 | R | 1 | 18.06 | |||||||
| Ceftriaxone | S | 4 | 3.055 | 0.56 | S | 2 | 3.74 | 0.44 | S | 7 | 2.97 | 0.51 | S | NT | NT | |
| R | 4 | 2.228 | R | 5 | 6.3 | R | 1 | 3.37 | R | |||||||
| Ceftazidime | S | 4 | 3.055 | 0.56 | S | 2 | 3.74 | 0.44 | S | 7 | 2.97 | 0.65 | I | 7 | 10.2 | |
| R | 4 | 2.228 | R | 5 | 6.3 | R | 1 | 3.79 | R | 0 | ||||||
| Ciprofloxacin | S | 4 | 3.055 | 0.56 | S | 0 | 4.9 | S | 4 | 4.38 | 0.24 | S | 5 | 19.2 | 0.2 | |
| R | 4 | 2.228 | R | 7 | R | 4 | 2.865 | R | 2 | 7.55 | ||||||
| Colistin | S | 8 | 2.1 | S | 5 | 6.3 | 0.44 | S | 0 | 3.3 | S | 7 | 10.2 | |||
| R | 0 | R | 2 | 3.74 | R | 8 | R | 0 | ||||||||
| Gentamicin | S | 4 | 3.20 | 0.08 | S | 5 | 3.9 | 0.62 | S | 5 | 2.97 | 0.88 | S | 5 | 7.55 | 0.24 |
| R | 4 | 2.16 | R | 2 | 5.8 | R | 3 | 3.79 | R | 2 | 19.2 | |||||
| Meropenem | S | 8 | 2.1 | S | 6 | 4.6 | 0.13 | S | 7 | 2.97 | 0.51 | S | 6 | 7.81 | 0.61 | |
| R | 0 | R | 1 | 10.28 | R | 1 | 3.79 | R | 1 | 18.06 | ||||||
a
The table shows the relationship between biofilm formation (p50) and antimicrobial resistance (MIC). R, resistant; S, sensitive.