Fig. 3

Progression of biofilm development on HA discs. Over the 4 days of growth the biofilm progressed in surface coverage on the disc, becoming progressively more uniform by 4 days. Contrast enhanced (Adobe Photoshop Elements 15) to more clearly show the biofilm against the background. The dark region near the top of the disc and the arc near the bottom are artefacts from the forceps holding the discs