Antibody blocking activity of <i>in vitro</i> infection assay with sera produced by immunization of rabbits with NgoΦfil particles.

Three dilutions of sera were tested for blocking the binding of different N. gonorrhoeae cells and ME180 cervical epithelial cells (ATCC, Manassas, VA). The data shown represent the geometric means and standard errors of three independent experiments. One-tailed P values of ≤ 0.10 for F62 and MS11 strains and ≤ 0.05 for FA1090 and 1291B strains were considered statistically significant.