Gonorrhea is one of the most common sexually transmitted infections. It is sometimes also referred to as "the clap". It is caused by bacteria known as Gonococci. They can affect all mucous membranes, typically in the urethra, but also in the rectum, mouth and throat.
Gonorrhea raises the risk of HIV transmission. In people who are HIV positive, the inflamed mucous membranes contain a very high level of virus. The same applies to the fluid secreted by the mucous membranes. In HIV-negative people, the inflammation makes it easier for the virus to enter the body.