Fig. 2.

Polystyrene surfaces coated with PAM extract inhibit biofilm formation. Drops of PAM extract were pipetted onto the surface of a 24-well microtiter plate and allowed to evaporate. In some wells the PAM extract was diluted with 1 or 3 volumes of water. Wells were then inoculated with S. epidermidis (A) or A. actinomycetemcomitans (B) and incubated at 37°C. After 18 h, wells were rinsed with water and stained with crystal violet.