Getting tested for chlamydia is simple and usually painless. In most cases, it involves either a urine sample or a swab, with results back within a day. You don’t need symptoms to get tested, and because chlamydia often causes no symptoms at all, routine screening is the main way most infections are caught.
What the Test Involves
The standard chlamydia test uses a method called nucleic acid amplification, which detects tiny amounts of the bacteria’s genetic material in your sample. It catches 20% to 50% more infections than older testing methods like cultures, with sensitivity above 90% and specificity over 99%. In practical terms, that means very few false positives and very few missed infections.
The sample you provide depends on your anatomy and where the infection might be:
- For women and people with vaginas: A vaginal swab is the preferred method, offering 5% to 10% better detection than urine. You can often collect this swab yourself in the clinic. A urine test works too, but it’s a second-best option when a swab isn’t practical.
- For men and people with penises: A urine sample is standard. You’ll provide what’s called a “first-catch” sample, meaning the first part of your urine stream, not a midstream sample. The cup only needs to be about one-third full. Don’t clean or wipe your genitals beforehand, and make sure it’s been at least 20 minutes since you last urinated.
- For rectal or throat exposure: A swab of the specific site is needed. Urine and genital samples won’t detect infections in the throat or rectum. These swabs can be collected by a clinician or, in some settings, self-collected.
If you’re getting a rectal swab, avoid using lubricants or hygiene products in the area beforehand, as these can interfere with the test.
When to Test After Exposure
Chlamydia doesn’t show up on a test immediately after exposure. The bacteria need time to multiply enough for the test to detect them. One week after a potential exposure catches most infections. Waiting two weeks catches nearly all of them. Testing too early raises the risk of a false negative, meaning you could have the infection but get a clean result.
If you have symptoms like unusual discharge, burning during urination, or pain during sex, testing is worth doing right away regardless of timing, since your body may already have a detectable level of bacteria.
Where to Get Tested
You can get a chlamydia test at your primary care doctor’s office, an urgent care clinic, a sexual health clinic, or a Planned Parenthood location. Many health departments offer free or low-cost testing. College health centers routinely provide it as well.
At-home test kits are another option. These use the same type of laboratory analysis as clinic tests, and the tests themselves are reliable. The main concern is sample quality. Collecting an adequate swab or urine sample without guidance from a clinician introduces room for error. If you go the at-home route, follow the kit’s instructions carefully, particularly around timing since your last urination and swab technique.
Who Should Get Screened Routinely
Because chlamydia so often has no symptoms, screening guidelines exist for people who may not realize they’re at risk. The CDC recommends annual chlamydia testing for all sexually active women under 25. Women 25 and older should be tested annually if they have a new partner, multiple partners, or a partner with an STI. Pregnant women under 25 should be screened at their first prenatal visit, with a repeat test in the third trimester if risk factors remain.
For men who have sex with men, the CDC recommends annual screening at all relevant anatomic sites, with more frequent testing if they or their partners have multiple partners. For other sexually active young men, screening is recommended in areas where chlamydia rates are high.
Extragenital Testing
Chlamydia can infect the throat and rectum, not just the genitals. These infections are easy to miss because genital testing won’t find them, and they often produce no symptoms. Rectal and throat testing is specifically recommended for men who have sex with men, people involved in sex work, known contacts of someone with chlamydia, and anyone with symptoms at those sites like rectal pain or a persistent sore throat.
Even outside those groups, your clinician may recommend extragenital testing based on your sexual history. The accuracy of modern testing at these sites is high. For rectal chlamydia, the best available tests detect about 93% of infections, compared to just 27% with older culture methods.
Getting Your Results
Most chlamydia test results come back within one day. Some clinics offer rapid tests that return results in 90 minutes or less, though these are less widely available. Your clinic will typically contact you by phone, patient portal, or secure message.
A positive result means you’ll be prescribed antibiotics, which clear the infection effectively. You should also notify recent sexual partners so they can be tested and treated. Reinfection is common, so the CDC recommends retesting three months after treatment regardless of whether you believe your partner was treated. This three-month retest is one of the most important steps people skip, and it’s the main reason chlamydia keeps circulating.
A negative result is reassuring, especially if you tested at least two weeks after your last potential exposure. If you tested earlier than that and your risk was significant, repeating the test at the two-week mark gives you a more definitive answer.