Gonorrhea: Causes, Symptoms, Prevention And Treatment Gonorrhea is a sexually transmitted infection (STI). It is caused by a bacterium, Neisseria gonorrhea. It is the second most common STD  and mostly affects young sexually active people between 15-24 years. Most people with Gonorrhea will also be infected with Chlamydia (we will discuss it next). It is … Continue reading Gonorrhea: Causes, Symptoms, Prevention And Treatment