Antimicrobial activity of spherical silver nanoparticles prepared using a biocompatible macromolecular capping agent: evidence for induction of a greatly prolonged bacterial lag phase

Table 1 Spread plate growth of Staphylococcus aureus on solid media in the presence of various Np concentrations.

Averages associated with different letters are significantly different at the p = 0.05 level (ANOVA & multiple range test performed on log-transformed data). The size of the spotted Np areas was approximately 0.255 cm². The lowest effective concentration provides a Np:CFU ratio of ca. 10¹¹. This calculation is assuming a [Np]-0 CFU intersection occurring at about 2 × 10¹³ Np s (in 10 μL) and 375 CFU per 0.255 cm² drop area.

ISSN: 1477-3155