FIG. 1.

Inhibitory action of BisBAL-coated polyurethane rods. Hydrogel-coated rods were soaked in 50 or 75 mM BisBAL overnight and embedded int agar plates seeded with S. epidermidis (■) or E. coli (●). Rods without BisBAL were also tested against S. epidermidis (▴) and E. coli (⧫). The plates were incubated overnight at 37°C, and the zones of inhibition were measured. The rods were transferred daily to fresh plates. Zone diameters are expressed as the means of three samples. The diameter of the rod was 3 mm, which was equivalent to no zone.