Fig. 3.4. Neisseria gonorrhoea
Antigenic structure: antigenically heterogeneous and capable of changing its surface structures.
Pili: Hair-like appendages extending from bacterial surface and enhance attachment to host cells and evade human defense. . The pilus of almost all strains of N. gonorrhoea are antigenically different, and a single strain can make many antigenically distinct forms of pilin.
Por (Protein I)
. Pores on the surface of bacteria through which nutrients enter the cell.