Figure 3. Area of silicone elastomer covered by biofilm. Patterns are identified in Table 1 and Figure 2. Values are the mean of measures obtained from 15 photographs of each of 6 discs. Error bars are the standard error of the mean (n = 6). Asterisks indicate that the area covered by biofilm was significantly different (ANOVA, p < 0.05) than that found on smooth surfaces (controls, pattern 0).