Gonorrhea spreads through sexual contact, specifically vaginal, anal, or oral sex with someone who has the infection. The bacteria behind it, called Neisseria gonorrhoeae, infects mucous membranes, the moist, soft tissue lining the genitals, rectum, throat, and eyes. Ejaculation does not need to occur for transmission. Simple contact between infected mucous membranes is enough.
How the Bacteria Gets In
Gonorrhea targets a specific type of cell that lines your urinary tract, cervix, rectum, and throat. The bacteria use tiny hair-like structures on their surface to latch onto these cells, then produce proteins that help them burrow inside and evade your immune system. Once attached, the infection establishes itself quickly. Symptoms can appear anywhere from 1 to 14 days after exposure, though many people never develop symptoms at all.
Because the bacteria need warm, moist tissue to survive, the infection can take hold at any site involved in sexual contact. That means you can have gonorrhea in your throat, rectum, or genitals, and you can be infected at more than one site simultaneously.
Vaginal and Anal Sex
Vaginal and anal intercourse are the most common ways gonorrhea spreads. During vaginal sex, the bacteria can pass in either direction between the penis and cervix or vaginal lining. During anal sex, the infection can spread to or from the rectal lining. Condomless sex carries the highest risk, but even brief penetrative contact without ejaculation can transmit the infection because the bacteria live on mucosal surfaces, not just in semen or vaginal fluid.
Oral Sex
Gonorrhea can infect the throat when you perform oral sex on a partner who has a genital or rectal infection. It can also move in the other direction: if you have gonorrhea in your throat, you can pass it to a partner’s genitals during oral sex. Throat infections are particularly important because they’re often completely symptom-free, which means people unknowingly spread the bacteria. Throat gonorrhea is also harder to treat than genital infections, and if left untreated, the infection can potentially spread to other parts of the body.
Spreading It to Your Own Eyes
You can transfer gonorrhea from one part of your body to another through your hands. The most common scenario is touching infected genital or rectal discharge and then touching your eyes. This is called autoinoculation, and the resulting eye infection (gonococcal conjunctivitis) is serious. Untreated, it can damage the surface of the eye and lead to blindness. The chain can also work in reverse: infection can spread from the eyes to the hands to the mouth and throat. Washing your hands after touching infected areas is a straightforward way to prevent this.
Mother-to-Baby Transmission
A pregnant person with gonorrhea can pass the infection to their baby during vaginal delivery. The baby’s eyes are exposed to the infected cervix during birth, and symptoms typically appear 2 to 5 days later. The most dangerous outcome is a severe eye infection that, without prompt treatment, can perforate the eye and cause blindness. In rarer cases, the bacteria can enter the baby’s bloodstream and cause joint infections or meningitis. Less severe forms include nasal, vaginal, or urethral infections in the newborn. This is why newborns routinely receive antibiotic eye ointment shortly after birth.
Why Many People Spread It Without Knowing
A large portion of gonorrhea infections produce no symptoms, especially in women. You can carry and transmit the bacteria from your cervix, throat, or rectum for weeks or months without any sign that something is wrong. Men with urethral infections are more likely to notice symptoms like painful urination or discharge, but throat and rectal infections in men are frequently silent too.
This invisible spread is a major reason gonorrhea remains so common. In 2024, over 543,000 cases were reported in the United States alone, with rates of about 203 per 100,000 in men and 116 per 100,000 in women. The actual number of infections is likely higher, since asymptomatic cases often go undiagnosed.
Reinfection After Treatment
Having gonorrhea once does not protect you from getting it again. Reinfection rates are high, and studies consistently show that most apparent “treatment failures” are actually new infections picked up from untreated partners or new sexual contacts. This happens because antibiotics clear the bacteria from your body but don’t create any lasting immunity.
If you’re treated for gonorrhea, you should avoid sex for at least 7 days after treatment and make sure your partners are also treated. The CDC recommends retesting 3 months after treatment regardless of whether you believe your partner was treated, because reinfection is so common.
What About Toilet Seats and Towels?
The bacteria can technically survive briefly on surfaces. Lab studies have found it can last up to 2 hours on a toilet seat, about 3 hours on toilet paper, and up to 24 hours on a damp towel. However, survival on a surface and actual transmission through a surface are very different things. The bacteria would need to travel from that surface directly to your mucous membranes in sufficient quantity to start an infection, which is extremely unlikely in real-world conditions. Gonorrhea is not spread through casual contact like sharing food, hugging, sneezing, or sitting on toilet seats.
How to Reduce Your Risk
Condoms and dental dams significantly reduce the risk of transmission during vaginal, anal, and oral sex, though they don’t eliminate it entirely since they don’t cover all mucosal surfaces. Reducing your number of sexual partners lowers your cumulative exposure. Regular screening is especially important if you’re sexually active with new or multiple partners, since you can carry and spread the infection without ever feeling sick.
If you test positive, getting your sexual partners tested and treated is one of the most effective things you can do to break the cycle. Untreated partners are the primary driver of reinfection, which keeps the bacteria circulating through sexual networks.