Chlamydia is the most commonly reported bacterial sexually transmitted infection in the United States. You get it through vaginal, anal, or oral sex with someone who has the infection. The bacteria Chlamydia trachomatis spreads through contact with infected genital fluids or mucous membranes, and it often produces no symptoms at all. Because of that silence, prevention and regular testing are the only reliable ways to protect yourself and your partners.
How Do You Get Chlamydia Causes And Prevention? The Reason It Spreads So Easily
The reason chlamydia spreads so easily comes down to two factors: the bacteria’s survival strategy and the lack of symptoms. The bacteria infects the cells lining the cervix, urethra, rectum, and throat. It does not need skin-to-skin contact the way HPV or herpes do. Instead, it requires direct exposure to infected secretions.
That exposure happens during unprotected vaginal, anal, or oral sex. A man does not need to ejaculate for transmission to occur. A woman does not need to have symptoms. The bacteria can be present in pre-ejaculate fluid and vaginal secretions. Sharing sex toys without washing them or using a new condom can also spread the infection.
Chlamydia cannot be caught from toilet seats, towels, doorknobs, or swimming pools. It does not survive long outside the human body. Casual contact like hugging or kissing does not transmit it. The infection requires the specific conditions of sexual contact with infected fluids.
Vertical transmission matters too. A pregnant woman can pass chlamydia to her baby during vaginal delivery. This can cause eye infections or pneumonia in the newborn. This is why routine chlamydia screening is standard during prenatal care.
Who Should Get Tested and How Often
Testing is the only way to know if you have chlamydia because most people have no symptoms. The Centers for Disease Control and Prevention recommends annual chlamydia screening for all sexually active women under 25. Women 25 and older with new or multiple sex partners should also be screened annually.
Men who have sex with men should get tested at least once a year. Those with multiple partners or who engage in condomless anal sex should be tested more frequently, such as every three to six months. Transgender and gender-diverse people should follow screening recommendations based on their anatomy and sexual practices.
Anyone with a new partner, multiple partners, or a partner who has tested positive should get tested. Testing is also recommended if you are pregnant regardless of age. If you have had chlamydia before and completed treatment, you should be retested about three months later. This is called a test of cure and it checks for reinfection, which is common.
The test itself is simple. It is usually a urine sample or a swab of the affected area such as the cervix, urethra, rectum, or throat. Results typically come back within a few days. Many clinics offer free or low-cost testing, and at-home test kits are available in most states.
Symptoms: What to Watch For
Most people with chlamydia never develop symptoms. Estimates suggest that up to 70 percent of women and a similar proportion of men have no noticeable signs. When symptoms do appear, they usually show up one to three weeks after exposure.
In women, symptoms can include abnormal vaginal discharge, a burning sensation when urinating, and pain during sex. Some women experience bleeding between periods or after sex. Lower abdominal pain can occur if the infection has spread to the uterus or fallopian tubes.
In men, symptoms include discharge from the penis, a burning sensation when urinating, and pain or swelling in one or both testicles. Rectal infections in both men and women can cause discharge, pain, or bleeding from the rectum. Throat infections from oral sex usually cause no symptoms at all.
If you notice any of these signs, get tested immediately. Do not wait for symptoms to worsen. Early treatment prevents complications and stops you from passing the infection to others.
Complications of Untreated Chlamydia
Untreated chlamydia does not go away on its own. It can persist for months or years and cause serious damage over time. In women, the most significant risk is pelvic inflammatory disease, or PID. PID is an infection of the uterus, fallopian tubes, and ovaries.
PID can scar the fallopian tubes, which increases the risk of ectopic pregnancy and infertility. Ectopic pregnancy is a life-threatening emergency where a fertilized egg implants outside the uterus. Some research indicates that a single episode of PID can reduce fertility, and the risk increases with each episode.
In men, untreated chlamydia can cause epididymitis, an inflammation of the tube that carries sperm. This can cause pain and, in rare cases, affect fertility. Chlamydia also increases the risk of acquiring and transmitting HIV. The inflammation caused by the infection makes it easier for HIV to enter the body.
Reactive arthritis is another possible complication. This condition causes joint pain, swelling, and sometimes eye or urinary tract inflammation. It can develop weeks after a chlamydia infection, even if the infection was treated.
Treatment: What Works and What Does Not
Chlamydia is curable with antibiotics. The standard treatment is a single dose of azithromycin taken orally, or doxycycline taken twice daily for seven days. Both are highly effective, with cure rates above 95 percent when taken as directed.
You must take the full course of antibiotics exactly as prescribed. Do not stop early even if you feel better. Symptoms may improve within a few days, but the infection is not cleared until the full course is complete.
You should not have sex for seven days after starting treatment. This includes oral and anal sex. This waiting period ensures you do not pass the infection to a partner. Your current partner or partners should also be tested and treated, even if they have no symptoms. If they are not treated, you can easily reinfect each other.
There is no over-the-counter treatment for chlamydia. Home remedies, herbal supplements, and douching do not cure the infection. Only prescription antibiotics work. If you test positive, see a healthcare provider promptly for treatment.
Prevention: What Actually Reduces Your Risk
Condoms are the most effective way to prevent chlamydia when used consistently and correctly. Latex and polyurethane condoms block the exchange of genital fluids. Use a new condom for every act of vaginal, anal, and oral sex. Internal condoms, sometimes called female condoms, also provide protection.
Dental dams can reduce the risk of transmission during oral-vaginal or oral-anal sex. These are thin latex sheets placed over the genitals or anus. They are available online and in some pharmacies.
Regular testing is a form of prevention. Knowing your status protects you and your partners. If you test positive, notify anyone you have had sex with in the past 60 days so they can get tested and treated. Many health departments offer partner notification services that allow you to do this anonymously.
Limiting your number of sexual partners reduces your exposure risk. Mutual monogamy with a partner who has tested negative is the most reliable prevention strategy. PrEP, the medication that prevents HIV, does not protect against chlamydia. Birth control pills, patches, and rings do not protect against any sexually transmitted infection.
Frequently Asked Questions
Can you get chlamydia from oral sex?
Yes. Chlamydia can infect the throat through oral sex with an infected partner. Throat infections usually cause no symptoms, so testing is important if you have had unprotected oral sex.
How long after exposure will chlamydia show up on a test?
Most tests can detect chlamydia within one to two weeks after exposure. If you test too early, you may get a false negative, so some clinicians recommend waiting about two weeks before testing.
Can chlamydia come back after treatment?
Yes. Treatment cures the infection, but you can be reinfected if you have sex with an untreated partner. This is why your partner must be treated too, and why retesting about three months after treatment is recommended.
Can you get chlamydia without having sex?
No. Chlamydia is transmitted through vaginal, anal, or oral sex with an infected person. It can also pass from a mother to her baby during childbirth, but it cannot be caught from toilet seats, towels, or casual contact.
