Chlamydia testing in men is usually a simple urine test. No blood draw, no uncomfortable swab in most cases. You provide a urine sample at a clinic or lab, and the sample is analyzed using a highly accurate method called a Nucleic Acid Amplification Test (NAAT), which detects the genetic material of the bacteria. Results typically come back within one to five days.
The Standard Test: A Urine Sample
For most men, chlamydia testing means peeing into a cup. The sample needs to be “first-catch” urine, meaning the initial stream rather than a midstream sample. This is the opposite of what you might be used to for other urine tests. The first part of the stream is what carries bacteria from the urethra, which is exactly what the lab needs to detect an infection.
There are a couple of preparation steps. You should avoid urinating for at least one to two hours before providing the sample so enough bacteria accumulate in the urethra. You only need a small amount of urine, roughly 30 mL or about two tablespoons. The clinic will provide a sterile cup and instructions.
The CDC considers first-catch urine samples equivalent to, and in some situations superior to, urethral swabs for detecting chlamydia in men. Combined with the fact that it’s painless and fast, this is why urine testing has become the default approach.
When a Swab Is Used Instead
In some situations, a swab may be collected rather than urine. A urethral swab involves inserting a thin, flexible swab a short distance into the opening of the penis. It’s brief but can be uncomfortable. This was once the standard method but has largely been replaced by urine testing for routine screening.
A newer option is a meatal swab, where you or a provider swabs just the opening of the urethra without inserting it deeper. Recent studies show that self-collected meatal swabs perform comparably to urine samples or provider-collected urethral swabs. Some clinics offer this as an alternative if you’re unable to provide a urine sample.
Rectal and Throat Swabs
Chlamydia can infect areas beyond the urethra. If you’ve had receptive anal or oral sex, a urine test won’t detect infections at those sites. Rectal and throat swabs are the only way to check for chlamydia in those locations. A rectal swab involves inserting a small swab a short distance into the rectum, and a throat swab is similar to what you’d experience during a strep test.
The CDC recommends annual screening at all relevant anatomical sites of exposure for men who have sex with men, with more frequent testing if you or your partners have multiple sexual partners. These extra-genital infections often cause no symptoms at all, which makes site-specific testing important. A standard urine test alone would miss them entirely.
How Accurate the Test Is
NAAT testing is the gold standard for chlamydia detection. Sensitivity is well above 90%, meaning it catches the vast majority of actual infections. Specificity sits at 99% or higher, so false positives are extremely rare. These numbers hold for both symptomatic and asymptomatic men, which is why the same test works for screening people without symptoms and for diagnosing people who have them.
No test is perfect, though. If you test too soon after exposure, there may not be enough bacteria to detect. The recommended window is at least one week after potential exposure, with two weeks catching nearly all infections. Testing before that one-week mark increases the chance of a false negative.
What Happens After the Test
Lab-based NAAT results generally take one to five business days. Some clinics will call you only if the result is positive, while others provide results either way through a patient portal or follow-up visit. It’s worth asking your clinic what their process is so you’re not left wondering.
A positive result is straightforward to treat. Chlamydia is a bacterial infection cured with a short course of antibiotics. Your provider will also recommend that any recent sexual partners get tested and treated, since reinfection is common if a partner still carries the bacteria. A follow-up test about three months after treatment is typically recommended to confirm the infection hasn’t returned.
Who Should Get Tested
Unlike for women under 25, there’s no universal routine screening recommendation for men in the general population. The US Preventive Services Task Force has noted that current evidence is insufficient to recommend blanket screening for all men. That said, testing makes sense in several specific situations: if you have symptoms like burning during urination or unusual discharge, if a sexual partner has tested positive, if you have a new partner or multiple partners, or if you’re a man who has sex with men.
Chlamydia is one of the most common sexually transmitted infections, and it frequently causes no symptoms in men. Waiting for symptoms to appear is not a reliable strategy. If any of the situations above apply to you, requesting a test is simple and the process itself takes just a few minutes.