Scanning Electron Micrograph (SEM) of 24 hours old biofilms.

<p>(a) <i>S</i>. <i>oralis</i>, (b) <i>A</i>. <i>naeslundii</i>, (c) <i>V</i>. <i>dispar</i>, (d) <i>P</i>. <i>gingivalis</i> and (e) a four-species biofilm. In the mixed community, the individual species are exemplarily highlighted by arrows: <i>S</i>. <i>oralis</i> (a), <i>A</i>. <i>naeslundii</i> (b), <i>V</i>. <i>dispar</i> (c), and <i>P</i>. <i>gingivalis</i> (d).</p>