Table 1.
Biofilm and nonbiofilm forming Escherichia coli isolates by different methods and its correlation with catheterization/noncatheterization
| Escherichia coli isolates (100) | TCP | TM | CRA | |||
|---|---|---|---|---|---|---|
| Biofilm producers (%) | Nonbiofilm producers (%) | Biofilm producers (%) | Nonbiofilm producers (%) | Biofilm producers (%) | Nonbiofilm producers (%) | |
| Catheterized (49) | 44 (89.7) | 5 (10.3) | 38 (77.6) | 11 (22.4) | 38 (77.6) | 11 (22.4) |
| Noncatheterized (51) | 25 (49) | 26 (51) | 17 (33.3) | 34 (66.7) | 11 (21.6) | 40 (78.4) |
| Total=100 | 69 | 31 | 55 | 45 | 49 | 51 |
χ2=17.57, P=0.0001 (significant association between cauterization and biofilm production). TCP=Tissue culture plate, TM=Tube method, CRA=Congo Red Agar