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Analysis of biofilm-forming for different geographical regions.
| Region | Number of studies | Biofilm rate | Prevalence of biofilms (%) |
| Europe | 7 | 318/381 | 83.5 |
| Asia | 6 | 356/543 | 65.6 |
| South America | 6 | 55/59 | 93.2 |
| North America | 5 | 57/63 | 90.5 |
| Africa | 1 | 97/97 | 100 |
