Chlamydia is tested with a simple sample, either a urine specimen or a swab, that gets sent to a lab for analysis. Most people can expect results within a few days, though some newer rapid tests return results in about 30 minutes. The test itself is painless, and you can often collect the sample yourself.
The Standard Test and How It Works
The gold standard for chlamydia detection is a nucleic acid amplification test, commonly called a NAAT. This test works by finding tiny amounts of chlamydia DNA in your sample and copying it millions of times so it can be detected. Because the test can theoretically pick up a signal from a single copy of bacterial DNA, it catches infections that older methods miss. NAATs detect 20% to 50% more chlamydia infections than culture-based tests, with sensitivity above 90% and specificity of 99% or higher. In practical terms, that means very few infections slip through, and false positives are rare.
When you get tested at a clinic, urgent care, or your doctor’s office, a NAAT is almost certainly what they’ll use. Results typically come back within one to five business days, depending on the lab.
What Sample You’ll Provide
The sample type depends on your anatomy and the site of potential exposure.
For women, vaginal swabs are the most sensitive way to detect chlamydia. You can often collect a vaginal swab yourself at the clinic using a simple kit, without needing a pelvic exam. Self-collected vaginal swabs perform just as well as those collected by a clinician. Urine testing is an option but is less reliable in women and can miss infections, so vaginal swabs are strongly preferred.
For men, a first-catch urine sample (the first part of your urine stream, not midstream) is the standard. You’ll be asked not to urinate for at least one to two hours before the test so enough bacteria accumulates in the urethra. The process is as simple as peeing into a cup.
Testing Beyond the Genitals
Chlamydia doesn’t only infect the genitals. If you’ve had receptive anal or oral sex, the infection can be present in the rectum or throat without causing any symptoms. A genital-only test will completely miss these infections.
Rectal testing uses a swab inserted a short distance into the rectum. Self-collected rectal swabs are just as accurate as clinician-collected ones, and most clinics that offer extragenital testing will let you swab yourself. Annual rectal screening is recommended for men who have receptive anal sex, and it can be considered for women based on sexual history.
Throat (oropharyngeal) chlamydia is less well understood. Prevalence is low even in high-risk groups, and most people with it have no throat symptoms. Routine throat screening for chlamydia isn’t currently recommended. However, because many NAATs test for both chlamydia and gonorrhea from the same swab, chlamydia may be detected during a throat gonorrhea screening. If it is found, it should still be treated, since throat chlamydia can be transmitted to a partner’s genitals during oral sex.
When to Test After Exposure
Testing too soon after a potential exposure can give you a false negative. Chlamydia needs time to establish enough of a presence in your body for the test to detect it. The general window is: one week after exposure will catch most infections, and two weeks catches nearly all of them. If you test before the one-week mark and get a negative result, it doesn’t reliably mean you’re in the clear.
If you have symptoms like unusual discharge, burning during urination, or pelvic pain, testing is appropriate right away regardless of timing, since symptoms typically only appear once the infection is well-established.
At-Home Test Kits
Several companies now sell at-home chlamydia test kits that let you collect a sample (usually a vaginal swab or urine) and mail it to a lab. The lab analysis itself uses the same NAAT technology as in-clinic testing, so the underlying science is equivalent. The weak link is sample collection. Without guidance from a clinician, there’s a higher chance of collecting an inadequate sample, which can lead to inaccurate results. If you go this route, follow the collection instructions precisely. Also check whether the company discloses what type of lab analysis they use and whether their lab is properly certified.
Rapid and Point-of-Care Tests
An FDA-cleared rapid molecular test can now detect chlamydia (and gonorrhea) in about 30 minutes. This allows for same-visit diagnosis and treatment, eliminating the wait for lab results and the risk of losing patients to follow-up. Availability is still limited compared to standard lab-based testing, but it’s expanding. If same-day results matter to you, call ahead and ask if the clinic offers point-of-care molecular testing.
Who Should Get Screened Routinely
Chlamydia is often completely silent. Up to 70% of women and many men with the infection have no symptoms at all, which is why routine screening matters even if you feel fine.
The U.S. Preventive Services Task Force recommends annual chlamydia screening for all sexually active women 24 and younger. Women 25 and older should be screened if they have risk factors such as a new sexual partner, more than one partner, a partner who has other partners, inconsistent condom use outside a mutually monogamous relationship, or a previous STI. For men, there isn’t enough evidence to make a broad screening recommendation, though men who have sex with men are generally advised to screen annually or more frequently.
Retesting After Treatment
After completing treatment, you should not retest immediately. Because NAATs are so sensitive, they can pick up fragments of dead bacteria that linger after the infection has been cured, giving you a false positive. The standard recommendation is to wait at least three to four weeks before a test of cure. However, retesting at about three months after treatment is strongly encouraged, not because the first round of treatment failed, but because reinfection from an untreated partner is common.
Where to Get Tested and What It Costs
You can get tested at your primary care provider, an urgent care clinic, a sexual health clinic, or a Planned Parenthood location. Many public health departments run free or low-cost STI testing clinics. The CDC maintains an online locator at gettested.cdc.gov where you can search for nearby testing sites by zip code.
If you have health insurance, chlamydia screening is typically covered as preventive care with no copay, particularly for women in the recommended screening groups. Without insurance, out-of-pocket costs at commercial labs generally range from $35 to $175, though community health centers and public clinics often test for free or on a sliding fee scale. Confidentiality is standard at all of these locations.