TOPICS: Neisseria, bacteria, gram negative, diplococci, meningitidis, gonorrhoeae, chocolate agar, lipooligosaccharides, exotoxin, antigenic variation, pili, IgA protease, glucose fermentation, opa-proteins, C5-C9 complement deficiency, oxidase positive, Thayer-Martin agar, nystatin, polymyxin, trimethoprim
