CD40 and gonorrhea: The murine dendritic cells (DC 2.4) showed a significantly higher expression of CD40 upon exposure to the microparticulate formulations of the ent—DPD, n-butyl—DPD, and isobutyl—DPD microparticles integrated with the gonorrhea vaccine microparticles in contrast to the cells that were exposed to only gonorrhea vaccine microparticles.