NRGN and gonorrhea: The particularly invasive clone of Ng (the arginine/hypoxanthine/uracil-requiring [AHU–] auxotype that later was typed as a Por1A-1 serovar) that was responsible for 89% of DGI cases (and a rate of DGI approaching 3%) during 1973–1974 was responsible for 38% of cases of uncomplicated gonorrhea [40].