Rectal gonorrhea is tested with a simple swab of the anal canal, which is then analyzed using a highly accurate lab technique called a nucleic acid amplification test (NAAT). The process takes less than a minute, can often be done by you rather than a clinician, and results typically come back within a few days. Most rectal gonorrhea infections cause no symptoms at all, which makes testing the only reliable way to know if you have one.
What the Test Involves
The test itself is a rectal swab. You or a healthcare provider inserts a small, soft-tipped swab about one inch into the anus, rotates it at least twice to collect a cell sample, then gently removes it. The swab goes into a sealed specimen container and is sent to a lab. The whole collection takes under 30 seconds.
Many clinics now offer self-collection, meaning you do the swab yourself in a private bathroom rather than having a clinician do it. Research comparing self-collected rectal swabs to clinician-collected ones found 100% sensitivity and 99.4% specificity for detecting gonorrhea, with near-perfect agreement between the two methods. In practical terms, doing it yourself is just as accurate as having a provider do it.
How the Lab Analyzes Your Sample
The swab is tested using NAAT, which detects the genetic material of the gonorrhea bacteria. This is far more accurate than older culture-based testing, where bacteria had to be grown in a lab dish. In a study published in the Journal of Clinical Microbiology, culture detected only 23.8% of confirmed rectal gonorrhea infections, while the best NAAT method caught 100% of them with zero false positives. Culture misses roughly three out of four rectal infections, which is why NAAT has become the standard approach.
Most labs also test for chlamydia on the same swab, since the two infections frequently overlap and share the same collection method.
When to Get Tested After Exposure
Gonorrhea won’t show up on a test immediately after exposure. The bacteria need time to establish enough of a presence for the test to detect. Most infections become detectable within one week. Waiting two weeks catches nearly all cases. Testing earlier than one week risks a false negative, meaning you could be infected but get a clean result.
If you have symptoms like rectal discharge, anal itching, soreness, bleeding, or painful bowel movements, get tested right away regardless of timing. But keep in mind that many rectal infections produce no symptoms whatsoever, so the absence of symptoms doesn’t mean you’re in the clear.
Who Should Get Routine Screening
The CDC recommends that sexually active men who have sex with men get screened for rectal gonorrhea at least once a year, regardless of condom use. If you’re at higher risk (multiple partners, anonymous partners, sex while using drugs), every three to six months is recommended instead. These screenings should test each site of contact: urethra, rectum, and throat. A standard urine test for gonorrhea will completely miss a rectal infection.
For women and transgender or gender-diverse individuals, the CDC recommends considering rectal and throat screening based on sexual behaviors and exposure. If you’ve had receptive anal sex, rectal screening is worth discussing with your provider or simply requesting directly.
At-Home Testing Options
If you’d rather skip the clinic visit entirely, at-home test kits for rectal gonorrhea are available through companies like myLAB Box. These kits ship to your home, include an anal swab along with oral and urine collection materials, and you mail everything back to a certified lab. The labs processing these kits hold the same CAP and CLIA certifications required of hospital and clinic laboratories, so the analysis meets the same standards as in-person testing.
At-home kits are a good option if privacy is a concern or if your local clinic doesn’t routinely offer rectal screening. The self-collection process is identical to what you’d do in a clinic bathroom: insert the swab one inch, rotate it twice, place it in the container, and seal it up.
What Happens if You Test Positive
Rectal gonorrhea is curable with a single antibiotic injection. Treatment is straightforward and resolves the infection in most cases without follow-up visits, though your provider may recommend a retest a few weeks later to confirm the infection has cleared. You’ll also likely be treated for chlamydia at the same time unless that infection has already been ruled out, since co-infection is common.
Sexual partners from the preceding 60 days should be notified so they can get tested and treated as well. Untreated rectal gonorrhea can spread to others and, over time, increases vulnerability to other sexually transmitted infections. Retesting three months after treatment is recommended, since reinfection rates are high.