Gay and bisexual men should test for HIV, syphilis, gonorrhea, and chlamydia at least once a year, and every 3 to 6 months with higher risk such as new or multiple partners, a partner who tested positive, inconsistent condom use, or being on PrEP CDC screening. Testing should include throat and rectal swabs where those sites are exposed, not just urine.
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Everyone 15–65 — HIV at least once
USPSTF
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Sexually active women under 25 — chlamydia & gonorrhea yearly
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Gay & bisexual men — at least yearly, throat/rectal too
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Everyone pregnant — HIV, syphilis, hepatitis B
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More often with new or multiple partners
| Item | Value |
|---|---|
| Everyone 15–65 — HIV at least once | — USPSTF |
| Sexually active women under 25 — chlamydia & gonorrhea yearly | |
| Gay & bisexual men — at least yearly, throat/rectal too | |
| Everyone pregnant — HIV, syphilis, hepatitis B | |
| More often with new or multiple partners |
How STI screening actually works
Screening means testing when you feel fine. That's the whole point — most gonorrhea, chlamydia, and early HIV or syphilis infections cause no symptoms at all, so they spread quietly between partners until a routine test catches them. The mindset shift that matters most: how often you test is driven by your risk profile, not by whether anything feels wrong.
The samples depend on the infection and on where you've had contact. For HIV and syphilis, a clinician draws blood or does a fingerstick. HIV tests look for antibodies and the p24 antigen the body makes after infection; syphilis tests look for antibodies to the bacterium. For gonorrhea and chlamydia, the workhorse is a nucleic acid amplification test (NAAT), which detects the organism's genetic material — that can be run on a urine sample, but also on a throat swab and a rectal swab.
Those extra swabs are the part most clinics skip unless you ask. Gonorrhea and chlamydia at the throat and rectum are extremely common in men who have sex with men and a urine test alone will miss them entirely, because the infection isn't in the urethra. If you've had receptive oral or anal sex, ask specifically for throat and rectal swabs. The swab is a quick, shallow sample — at many clinics you can collect rectal and throat swabs yourself in a private room, which is fast and far less awkward than people expect.
How often should gay and bisexual men get screened?
The baseline recommendation is at least once a year for HIV, syphilis, gonorrhea, and chlamydia. Move to every 3 to 6 months if anything in your life raises your exposure. Risk — not symptoms — sets the interval: new or multiple partners, a partner who tested positive, inconsistent condom use, or being on PrEP all push you toward the more frequent end.
| Your situation | How often to screen | What to test |
|---|---|---|
| Sexually active, one steady partner, both tested | At least once a year | HIV, syphilis, gonorrhea, chlamydia (sites you're exposed at) |
| New or multiple partners, or inconsistent condoms | Every 3 to 6 months | HIV, syphilis, plus throat & rectal gonorrhea/chlamydia |
| On PrEP | Every 3 to 6 months (with PrEP follow-up) | HIV, syphilis, gonorrhea, chlamydia at all exposed sites |
| Partner tested positive | As soon as practical, then per window | The relevant infection plus a full panel |
USPSTF recommends everyone aged 15 to 65 be tested for HIV at least once, and younger or older people at increased risk be tested too USPSTF HIV. For chlamydia and gonorrhea, USPSTF's annual-screening guidance is framed around sexually active women under 25 and older women with risk factors USPSTF C&G, while the CDC's recommendations specifically extend frequent, multi-site screening to men who have sex with men. The practical move is to make it routine: tie a test to every new partner, your annual checkup, or starting PrEP.
When to test after exposure: the window period
Every test has a window — the gap between exposure and when the test can reliably detect infection. Test too early and a real infection can read negative, because antibodies or organism levels haven't risen enough yet. HIV antigen/antibody tests, syphilis blood tests, and gonorrhea/chlamydia NAATs each have their own detection windows, so a single negative right after a risky encounter doesn't fully clear you.
If you have a specific exposure you're worried about, time your test to the right window for each infection and repeat it if you tested early — see when to test after exposure for the per-infection timing. When a recent exposure could be HIV, don't wait passively: an urgent clinic visit may put post-exposure prophylaxis on the table, and on the prevention side, treating HIV early is itself protective — more on how earlier hiv treatment can help prevention.
Where to get tested and what it costs
You have several routes: a primary care clinician, a sexual-health or LGBTQ+ clinic, a Planned Parenthood, a public health department, or an at-home mail-in kit. Public health clinics often offer low- or no-cost STI testing, and many sexual-health clinics are set up specifically for the multi-site swabbing men who have sex with men need. At-home kits let you collect throat, rectal, and urine or blood samples privately and mail them in, which removes the in-person hurdle for a lot of people.
Costs vary widely by site, insurance, and which panel you order, so confirm before you go. If you're choosing among mail-in options, compare testing providers to see which ones include the throat and rectal swabs you actually need rather than urine alone. When you're ready, you can get tested through the right panel for your exposures.
Reading your results and how accurate they are
NAATs for gonorrhea and chlamydia are highly sensitive and specific, which is why they're the standard. The biggest source of a false reassurance isn't a faulty test — it's the wrong sample: a clean urine result tells you nothing about a throat or rectal infection that was never swabbed. That single gap is the most common screening mistake among men who have sex with men.
Some screening tests are designed to catch as much as possible, so a reactive result may be confirmed with a second, more specific test before it's called positive — that's routine for syphilis and HIV and isn't cause for panic. A negative result is only as good as your timing: if you tested inside the window after a recent exposure, repeat it later.
If a result comes back positive
A positive isn't an emergency, and the common bacterial STIs are curable with standard antibiotics. Start treatment promptly, tell recent partners so they can test, and avoid sex until you and your partners are treated. For regimens and what treatment looks like, see our get tested and treatment guidance rather than self-dosing.
When to see a clinician
See a clinician promptly if you have symptoms — discharge, burning with urination, a sore or ulcer, rectal pain or bleeding, a new rash, swollen lymph nodes, or sore throat that lingers. Also book a visit if a partner tells you they tested positive, if you've had a high-risk exposure and want to discuss prevention, or if you're starting PrEP and need your baseline panel. And if you and a partner are planning a pregnancy together, know that everyone who is pregnant is screened for HIV and syphilis because treating these protects the baby USPSTF syphilis in pregnancy — see how clinicians distinguish group b strep vs stis in pregnancy.