Gonorrhea spreads through sexual contact with an infected person. You can contract it during vaginal, anal, or oral sex without a condom, and an infected mother can pass it to her baby during childbirth. Those are the only established transmission routes. In 2024, more than 543,000 cases were reported in the United States alone, making it one of the most common sexually transmitted infections in the country.
Vaginal, Anal, and Oral Sex
The bacterium that causes gonorrhea, called Neisseria gonorrhoeae, lives in warm, moist mucous membranes: the urethra, cervix, rectum, and throat. During unprotected sex, the bacteria transfer from one person’s infected tissue to another person’s mucous membranes. It doesn’t need a cut or an open wound to get in. Simple contact between mucous membranes and infected fluids is enough.
The risk isn’t equal across all types of contact. After a single episode of vaginal intercourse, the likelihood of transmission from a woman to a man is roughly 22%, while transmission from a man to a woman is likely higher. Receptive anal intercourse carries the highest per-act risk, reaching as high as 42% when condoms aren’t used consistently. Oral sex is a lower-risk route, but it absolutely can transmit the infection, particularly to the throat.
This means gonorrhea can infect your genitals, rectum, or throat depending on the type of sex involved. Many people don’t realize a throat infection is possible, so they never mention oral sex to their healthcare provider and the infection goes undetected.
Why So Many Cases Go Unnoticed
One of the biggest reasons gonorrhea spreads so effectively is that most people who have it don’t know. Roughly 90% of women with a genital gonorrhea infection have no symptoms at all. In men, asymptomatic rates range from about 56% to 87%. That means the majority of infected people feel perfectly fine and can unknowingly pass the bacteria to sexual partners for weeks or months.
When symptoms do appear, they typically show up within 2 to 5 days of exposure, though the window can stretch anywhere from the same day to 30 days later. In men, symptoms often include painful urination and discharge. In women, symptoms (when present) can mimic a urinary tract infection or mild vaginal irritation, making them easy to dismiss. Rectal and throat infections are especially likely to be silent.
What Happens During Transmission
The bacteria have a clever trick that helps them spread. When Neisseria gonorrhoeae comes into contact with seminal fluid, proteins in the semen trigger the bacteria to change their behavior. Tiny hair-like structures on the bacterial surface, called pili, normally clump together in bundles. Semen causes those bundles to separate into individual filaments, which makes the bacteria better at crawling across surfaces and sticking to new cells. This semen-activated state essentially primes the bacteria for colonizing the next host during sexual transmission.
Once the bacteria reach a new mucous membrane, they attach to the surface cells and begin multiplying. The infection stays localized at first, but in some cases it can enter the bloodstream and spread to joints and other parts of the body.
Mother-to-Baby Transmission
A pregnant person with an untreated gonorrhea infection can pass the bacteria to their baby during vaginal delivery. The newborn’s eyes are especially vulnerable. The most serious complication is a severe eye infection that can lead to blindness if untreated. This is one reason hospitals routinely apply antibiotic ointment to newborns’ eyes shortly after birth. Less commonly, newborns can develop infections of the throat, rectum, vagina, or scalp.
Can You Get It From a Toilet Seat?
This is one of the most common questions people have, and the practical answer is no. Neisseria gonorrhoeae is a fragile organism that needs the warm, moist environment of mucous membranes to thrive. Lab studies have shown the bacteria can technically survive up to 24 hours on surfaces like glass or towels at room temperature. But survival in a lab and actual transmission are very different things. The bacteria would need to travel from a surface directly into your urethra, cervix, rectum, or throat in sufficient numbers, which doesn’t happen through casual contact with toilet seats, shared towels, swimming pools, or doorknobs.
You also cannot contract gonorrhea from hugging, shaking hands, sharing food, or sitting next to someone. It requires direct mucous membrane contact with infected genital, rectal, or throat secretions.
Reinfection Is Common
Having gonorrhea once does not protect you from getting it again. Your body does not build lasting immunity to the bacteria. Research shows that as many as 20% of women who are treated for gonorrhea become reinfected within six months, with the majority of repeat infections occurring in that early window. This often happens when a person is treated successfully but their sexual partner is not, creating a cycle of reinfection.
This is why healthcare providers recommend that both you and your partner get tested and treated at the same time, and that you avoid sexual contact until treatment is complete.
How Condoms Reduce Risk
Latex and polyurethane condoms, when used correctly and consistently, are more than 90% effective at preventing gonorrhea transmission. The key words are “correctly and consistently,” meaning every time, from start to finish. Condoms work by creating a physical barrier that prevents the bacteria from reaching mucous membranes.
For oral sex, dental dams or condoms provide a barrier, though they’re used far less frequently in practice. Reducing your number of sexual partners and getting tested regularly (especially if you have new or multiple partners) are additional ways to lower your risk. Because gonorrhea so often produces no symptoms, routine screening is the only reliable way to catch an infection early and prevent passing it to someone else.