How chlamydia testing works: urine, swabs and timing
NAAT testing can use urine or self-collected swabs. The right site and enough time after exposure matter.
DIRECT ANSWER
An online consultation lets an EU-licensed doctor review your case and, if appropriate, issue a prescription that is valid across the EU.
Less than 4 hours on average
Prescription issued in less than 4 hours on average if approved.
EU-licensed doctors
Every case is reviewed by a licensed clinician.
Valid across the EU
Approved prescriptions can be used at any EU pharmacy.
In this article
HOW IT WORKS
From consultation to collection
- 1
Step 1
Consultation
Answer a secure medical questionnaire online.
- 2
Step 2
Doctor reviews
An EU-licensed doctor personally assesses your case.
- 3
Step 3
Prescription in less than 4 hours on average
If approved, your prescription is issued in less than 4 hours on average.
- 4
Step 4
Collect at any EU pharmacy
Use an approved prescription at a pharmacy anywhere in the EU.
Modern chlamydia testing usually uses a nucleic acid amplification test, often shortened to NAAT. It looks for genetic material from Chlamydia trachomatis and is more sensitive than older test methods. The collection method is usually simple, but it must match the anatomy and exposure.
Urine is not the only sample
First-catch urine may be used for urethral infection; this is different from the midstream sample often requested for a UTI. A self-collected vaginal swab is commonly accurate and may be preferred for genital screening. Rectal or throat swabs are needed when those sites were exposed, because a genital sample cannot reliably rule out an infection elsewhere.
Testing too early
Immediately after exposure, the amount of bacterial material may be too low to detect. Services use a testing window based on the assay and context. A negative test taken too early may need repeating. If a partner is confirmed positive or symptoms are present, a clinician may recommend assessment or management without simply waiting for a later home test.
What a result means
A positive NAAT supports current infection and should lead to treatment and partner advice. A negative result is reassuring only for the sites sampled and exposures covered by the timing. After treatment, residual genetic material can sometimes affect an early repeat test, so do not choose a retest date without service guidance.
When to seek help
Seek prompt in-person care for severe pelvic or testicular pain, fever, vomiting, pregnancy with concerning symptoms, eye pain after possible exposure, or feeling acutely unwell. Do not use leftover antibiotics or share treatment. Until a clinician confirms the appropriate interval after treatment, avoid sexual contact that could pass the infection on.
What to prepare for a medical review
A safe review includes the date and type of possible exposure, symptoms, pregnancy or breastfeeding, allergies, current medicines, and which anatomical sites may need testing. Partner notification and testing are part of care, not an accusation. A negative test from one site does not necessarily answer a question about another exposed site.
A calm next step
Before ordering or attending, list the exposed sites and date of the most recent contact. That information helps the service send the correct kit and interpret a negative result honestly.
Clinical sources used: European Centre for Disease Prevention and Control chlamydia factsheet and local sexual-health service instructions.