FIG. 7.

(A) Biofilm masses over 2 days of growth for N. gonorrhoeae strain 1291 norB::kan, either untreated (1) or treated with PTIO (2). Biofilms were visualized by GFP plasmid expression. The images are three-dimensional reconstructions of stacked z series taken at a magnification of ×200 and rendered by Volocity. These experiments were performed a minimum of three times, and representative results are shown. (B) Table showing results of COMSTAT analysis of biomass and average thicknesses. Statistical differences between treated samples and the untreated control were determined via paired Student's t tests, and the corresponding P values are listed.