Microbial persistence. Smooth and micro-patterned (MP) acrylic films were challenged with a sprayed inoculum and dried for 30 m. A.) Log densities of bacteria present on the surfaces of the MP compared to smooth controls for MSSA are plotted with the associated standard error of the mean. B.) A representative image of a RODAC contact plate after MSSA sampling, the MP surface (right) has fewer bacteria compared to the smooth surface (left). p < 0.005 (***) n = 3.