Figure 2.

Raw data for zone of inhibition, a measure of antibiotic resistance, across ancestor (time zero) and bacteria isolated from biofilms at 15, 30, and 60 days. Individual clones appear as dots. Red or green squares denote sensitive and resistant forms, respectively, determined as datapoints that are more than two standard deviations above or below the mean. Means for each replicate are marked with black bars and overall means connected with a dotted line. Antibiotics in the same class are followed by matching symbols.

Tyerman et al. BMC Evolutionary Biology 2013 13:22   doi:10.1186/1471-2148-13-22
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