Which STDs Show Up in a Urine Test?
Urine tests accurately detect chlamydia and gonorrhea — modern NAAT technology rivals swab sensitivity. Trichomoniasis also runs on urine for women and men. But urine can't screen HIV, syphilis, herpes or hepatitis (bloodwork territory), and it misses throat/rectal infections. A urine test is one component of real screening, never the whole picture.
What a urine test catches
| Infection | Urine NAAT accuracy | Notes |
|---|---|---|
| Chlamydia | >95% sensitive | The standard first-catch method |
| Gonorrhea | >95% sensitive | Urethral infection; misses pharyngeal/rectal sites |
| Trichomoniasis | High (FDA-cleared) | Better than wet-mount microscopy |
| Mycoplasma genitalium | Detectable via NAAT | Test selectively per resistance guidance |
How collection works right
First-catch matters: the initial 10–20mL of your stream carries the urethral cells labs need. Mid-stream samples dilute targets downward. Skip urinating about an hour before your visit so enough material accumulates.
What urine cannot do
- No blood-borne viruses: HIV, hepatitis B/C live in blood — serology only.
- No syphilis: diagnosed by blood antibody tests, full stop.
- No herpes antibodies: type-specific IgG requires serum.
- No extragenital coverage: throat and rectal infections need site swabs regardless of urine results (throat STI guide).
The classic mistake: "I did a urine test at urgent care, I'm clear." You're clear on two infections at one anatomical site. The other six suspects remain unphotographed. Complete panels pair urine with blood — see what a full panel includes.
Accuracy context: when urine results mislead
Even perfect lab technology produces misleading results in two situations: window periods (testing within days of exposure before bacterial loads build) and wrong-site sampling (urine negative while your throat harbors gonorrhea). Neither represents test failure — they represent mismatched expectations.
Treat a clean urine result as: "no urethral chlamydia/gonorrhea/trich detectable today." Then complete the rest of your screening story with bloodwork plus site-appropriate swabs. Logistics: timing windows, result timelines.
Frequently asked questions
Sources & further reading
- 📚 CDC — Chlamydia diagnosis — www.cdc.gov/chlamydia/hcp/clinical-overview
- 📚 CDC — Gonorrhea diagnosis — www.cdc.gov/gonorrhea/hcp/clinical-overview
- 📚 FDA — Nucleic acid amplification tests clearance summaries — www.fda.gov