What is Gonorrhea? Gonorrhea, also known as "the clap," is a sexually transmitted infection (STI) caused by the bacterium Neisseria gonorrhoeae. It primarily affects the mucous membranes of the reproductive and urinary tracts, including the cervix, urethra, rectum, throat, and eyes. The infection spreads through: Unprotected sexual contact (vaginal, anal, or oral) Blood transfusions…