Gonorrhea spreads through sexual contact with an infected person. The bacteria pass from one person to another during vaginal, anal, or oral sex, and ejaculation does not need to occur for transmission to happen. With over 540,000 reported cases in the United States in 2024 alone, it remains one of the most common sexually transmitted infections.
How the Bacteria Spreads During Sex
The bacterium that causes gonorrhea, Neisseria gonorrhoeae, lives on the warm, moist mucous membranes of the body: the urethra, cervix, rectum, throat, and eyes. During vaginal, anal, or oral sex, the bacteria transfer from an infected person’s mucous membranes or sexual fluids to a partner’s. Pre-ejaculate fluid can carry the bacteria, so transmission is possible even without ejaculation.
Once the bacteria reach a new host, they use tiny hair-like structures called pili to latch onto the surface of epithelial cells. After attaching, the bacteria essentially hijack the cell’s own signaling systems to force their way inside, where they can multiply and establish an infection. This process can happen at any site where mucous membranes are exposed during sex.
Oral and Anal Sex Are Also Routes
Many people underestimate the risk from oral sex. Giving oral sex to someone with a genital or rectal infection can lead to a throat (pharyngeal) infection. Receiving oral sex from someone with gonorrhea in the throat can result in a genital infection. Throat infections are particularly concerning because they are harder to treat and can help spread the bacteria to future partners through oral contact.
Anal sex carries risk for both partners. The receptive partner can develop a rectal infection, while the insertive partner can contract urethral gonorrhea from an infected rectum. Rectal and throat infections often cause no obvious symptoms, which makes them easy to miss and easy to pass along unknowingly.
You Can Spread It Without Knowing You Have It
This is one of the most important facts about gonorrhea transmission. Roughly 90% of women with urogenital gonorrhea have no symptoms at all. Among men, the asymptomatic rate ranges from about 56% to 87%. A person who feels completely fine can still pass the infection to every sexual partner they have.
When symptoms do appear, they typically show up about two weeks after exposure, though they can sometimes take months. That gap between infection and symptoms creates a window where someone is contagious but has no reason to suspect it.
Mother-to-Baby Transmission
Gonorrhea is not exclusively a sexually transmitted infection. A pregnant person with an untreated cervical infection can pass the bacteria to their baby during vaginal delivery. The most serious risk to the newborn is an eye infection called ophthalmia neonatorum, which can damage the eye severely enough to cause blindness if untreated. Less common complications in newborns include joint infections and meningitis. This is why newborns routinely receive antibiotic eye ointment at birth and why pregnant individuals are screened for gonorrhea.
What About Toilet Seats and Surfaces?
The bacteria can technically survive outside the body for short periods. Lab studies have found it lasting up to 2 hours on a toilet seat, up to 3 hours on toilet paper, and up to 24 hours on a damp towel. However, the bacteria are fragile. They need direct contact with mucous membranes to cause infection, and they die quickly on dry surfaces at room temperature. Practically speaking, catching gonorrhea from a toilet seat, swimming pool, or shared towel is not a realistic concern. The infection requires the kind of direct mucous membrane contact that happens during sex or childbirth.
You Can Get It More Than Once
Having gonorrhea does not create any lasting immunity. You can be reinfected immediately after successful treatment. In fact, reinfection rates are high. The CDC notes that a large proportion of people treated for gonorrhea test positive again later, and most of those cases are true reinfections rather than treatment failures. The most common reasons are having sex with an untreated partner or starting a relationship with a new infected partner.
After treatment, the recommendation is to avoid all sexual activity for seven days and to ensure that all recent partners have also been treated. Getting retested about three months after treatment helps catch reinfections early.
Who Is Most at Risk
Anyone who is sexually active can get gonorrhea, but certain patterns increase the likelihood. Having multiple sexual partners, inconsistent condom use, and a previous gonorrhea infection all raise the risk. In 2024, reported rates were higher among men (203 per 100,000) than women (116 per 100,000), though this partly reflects the fact that women are more likely to be asymptomatic and therefore less likely to be diagnosed.
Condoms, when used correctly during vaginal and anal sex, significantly reduce the risk. For oral sex, dental dams offer some protection, though they are used far less often in practice. Regular screening is the most reliable way to catch asymptomatic infections before they spread, particularly for sexually active people under 25 and anyone with new or multiple partners.