Chlamydia testing for men is straightforward: in most cases, you simply provide a urine sample. No blood draw, no uncomfortable exam. The standard test is a nucleic acid amplification test (NAAT), which detects the genetic material of the bacteria and is over 99% specific, making false positives rare. Depending on your sexual history, you may also need a swab from the throat or rectum.
The Urine Test
The most common method is a “first-catch” urine sample. You urinate into a sterile cup, collecting only the very first part of your stream rather than a midstream sample. That initial flow contains the highest concentration of bacteria shed from the urethra, which is where chlamydia typically infects men.
The one preparation step that matters: avoid urinating for at least one to two hours before the test. If you empty your bladder right beforehand, there may not be enough bacteria in the sample to detect, and you could get a false negative. Some labs say one hour is sufficient; others recommend two. If your appointment is in the morning, holding your urine from when you wake up is an easy way to meet the requirement.
Swab Tests for the Throat and Rectum
A urine test only checks the urethra. If you’ve had oral or anal sex, those sites can be infected independently, and a urine sample won’t pick that up. Rectal and throat swabs use the same NAAT technology and are the only way to detect chlamydia at those locations.
The CDC recommends that men who have sex with men get screened at all sites of contact (urethra and rectum) at least once a year, regardless of condom use. Men on PrEP, men living with HIV, or those with multiple partners should test every three to six months. For throat infections, gonorrhea screening is specifically recommended at that site, and many providers will test for chlamydia at the same time since the swab process is identical.
You can often swab yourself. A study of 374 men at a Washington, D.C. clinic found that self-collected rectal swabs had 95% agreement with provider-collected samples for chlamydia detection. In fact, patients identified more positive results than providers did in several cases, likely because they could position the swab more comfortably. The process takes a few seconds: you insert a thin swab about an inch and rotate it gently.
When To Test After Exposure
Chlamydia has a window period before it becomes detectable. Testing too early after a possible exposure can produce a false negative. The general timeline is:
- One week after exposure: catches most infections
- Two weeks after exposure: catches nearly all infections
If you test before that one-week mark, the bacteria may not have replicated enough for even a sensitive NAAT to detect. If you had a known exposure and your early test comes back negative, retesting at the two-week point gives you a much more reliable answer.
At-Home Test Kits
Several companies now sell mail-in chlamydia test kits. You collect a urine sample or self-swab at home, mail it to a certified lab, and get results online. These kits use the same NAAT technology as clinic-based tests, so the accuracy depends on proper sample collection rather than the setting.
The key is following the instructions carefully. Hold your urine beforehand, collect the first part of the stream, and mail the sample promptly. For rectal self-swabs, the research is reassuring: self-collection performs as well as or better than provider collection for detecting rectal chlamydia. Home kits typically cost between $50 and $150 without insurance, though prices vary by company and whether the panel includes other STIs like gonorrhea.
Getting Your Results
Standard lab-based NAAT results usually come back within one to five business days, depending on the lab and whether the sample needs to be shipped. Some sexual health clinics offer expedited processing. Rapid point-of-care tests exist but are less widely available for chlamydia than for HIV or syphilis, so most men will wait a few days.
A positive result means you have an active infection that needs antibiotic treatment. The standard course is a week-long oral antibiotic taken twice daily. A single-dose alternative exists but is no longer the first-line recommendation. You should avoid sex for seven days after starting treatment and until any symptoms resolve.
Retesting After Treatment
You don’t need a “test of cure” immediately after finishing antibiotics. Testing too soon, within four weeks of completing treatment, can produce a false positive because the test may pick up dead bacterial DNA that hasn’t cleared yet.
What you should do is retest about three months after treatment. Reinfection is common, often because a sexual partner wasn’t treated at the same time. The three-month retest catches these reinfections early, before they cause complications or spread further. If you can’t make it at three months, get retested whenever you next visit a provider within the following year.
Who Should Get Screened Routinely
Chlamydia often causes no symptoms in men, which is exactly why testing matters. You can carry and transmit the infection without knowing it. The CDC does not recommend routine screening for all heterosexual men at low risk, but screening is advised in certain settings like STI clinics, correctional facilities, and adolescent health centers where prevalence is higher. Sexually active men who have sex with men should screen annually at minimum, with more frequent testing if risk factors are present.
Free or low-cost testing is available at many public health clinics. The CDC’s GetTested tool (gettested.cdc.gov) lets you search by zip code for confidential testing sites near you.