GONORRHEA Also known as “the clap”, gonorrhea is also a common STI caused by the bacteria Neisseria Gonorrhoeae. Like chlamydia, it presents with little or no symptoms and people can be carriers of this infection with no clue whatsoever. When symptoms appear, they include: - Burning sensation while urinating - White, yellow or green discharge - Painful or swollen testicles (men) - Vaginal bleeding between periods - Rectal discomfort.