Gonorrhea spreads through vaginal, anal, or oral sex without a condom with someone who has the infection. The bacteria that causes it, called Neisseria gonorrhoeae, infects the moist tissue lining the genitals, rectum, throat, and eyes. Ejaculation doesn’t need to happen for transmission to occur.
How Gonorrhea Spreads During Sex
The gonorrhea bacterium thrives on mucous membranes, the warm, moist tissue found inside the urethra, cervix, rectum, and throat. During unprotected sex, the bacteria pass from one person’s infected tissue to another person’s exposed tissue through direct contact with infectious fluids like vaginal secretions, pre-ejaculatory fluid, or semen.
Any form of sexual contact that involves mucous membrane contact can transmit the infection. Vaginal and anal intercourse carry the highest risk, but oral sex (giving or receiving) can also spread the bacteria to or from the throat. Even brief contact is enough. The NHS notes that infections can be passed on even if the penis doesn’t fully enter the vagina or anus, and even if the man doesn’t ejaculate, because the bacteria can be present in pre-ejaculatory fluid and can transfer through genital-to-genital contact alone.
Most Infected People Have No Symptoms
One of the biggest reasons gonorrhea spreads so easily is that the majority of people who carry it don’t know they have it. Roughly 90% of women with urogenital gonorrhea are asymptomatic. In men, the asymptomatic rate is also high, estimated between 56% and 87%. These individuals feel completely fine but can still pass the bacteria to sexual partners.
When symptoms do appear, they typically show up within 1 to 14 days after exposure. In men, the most common sign is a thick, pus-like discharge from the penis along with painful urination. In women, symptoms are often milder or mistaken for a bladder or vaginal infection, which is part of why the infection goes unnoticed so often. Rectal and throat infections are especially likely to be silent, with no noticeable symptoms at all.
Transmission During Childbirth
A pregnant person with gonorrhea can pass the infection to their baby during vaginal delivery. As the baby moves through the birth canal, the bacteria from the infected cervix can reach the newborn’s eyes, nose, or other exposed areas. The most serious risk is a condition called ophthalmia neonatorum, a severe eye infection that can lead to perforation of the eye and permanent blindness if untreated. Less commonly, neonatal gonorrhea can cause joint infections, meningitis, or scalp infections. This is why routine screening during pregnancy and preventive eye treatment for newborns are standard practice.
Can You Get Gonorrhea From a Toilet Seat?
This is one of the most common questions about gonorrhea, and the practical answer is that it’s extremely unlikely. The gonorrhea bacterium is fragile outside the human body. Lab studies by the Public Health Agency of Canada found that it can survive on a toilet seat for up to 2 hours and on toilet paper for about 3 hours under controlled conditions. On a towel, survival stretched to 24 hours.
But survival on a surface and actual transmission are very different things. The bacteria would need to travel from that surface directly into your mucous membranes in a sufficient quantity to cause infection. In real-world conditions, this essentially doesn’t happen. Gonorrhea is transmitted through direct sexual contact, not through casual contact with objects, surfaces, swimming pools, or shared utensils.
How Condoms Reduce the Risk
Consistent condom use significantly lowers the chance of transmission. A study in the American Journal of Epidemiology found that among people with a known gonorrhea-positive partner, consistent condom use was associated with a 58% reduction in infection after adjusting for other risk factors. That’s a meaningful reduction, though not total protection. Condoms can’t cover every surface involved in genital contact, which is why they don’t eliminate risk entirely. Still, they remain the most effective barrier method available for reducing gonorrhea transmission during sex.
Reinfection After Treatment
Having gonorrhea once does not protect you from getting it again. Your body does not build lasting immunity to the bacterium, so reinfection happens frequently. The CDC notes a high rate of repeat infections among people previously treated for gonorrhea, with most cases traced to either untreated sexual partners or new partners who carry the infection.
After treatment, you should avoid all sexual activity for at least 7 days and wait until your partner has also completed treatment. Even after successful treatment, retesting is recommended 3 months later regardless of whether you believe your partner was treated. Scheduling that follow-up appointment on the same day as your initial treatment makes it easier to remember. If 3 months isn’t feasible, retesting within 12 months of treatment is still recommended.
Who Is Most at Risk
Anyone who is sexually active can get gonorrhea, but some factors raise the likelihood. Having multiple sexual partners, inconsistent condom use, and a previous gonorrhea diagnosis all increase your risk. Because gonorrhea so often produces no symptoms, getting tested regularly is the most reliable way to catch an infection early and prevent passing it to others. Gonorrhea remains one of the most common sexually transmitted infections in the United States, with the CDC reporting that it contributed to over 2.2 million combined STI cases (along with chlamydia and syphilis) in 2024, though gonorrhea-specific numbers have been declining for three consecutive years.