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Chlamydia trachomatis Detection Test

Published: August 9, 2026Updated: August 16, 2026

A test that checks for the bacterium Chlamydia trachomatis, commonly using urine or a swab from the genital area.

Quick summary

["A positive result can indicate a current chlamydia infection that may need treatment."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
60481-9
Short code
HEDIS 2011-12 CDC-H
Synonyms
HEDIS 2011-12 CDC-H
Category
lipid
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What is this test?

This test looks for Chlamydia trachomatis, a sexually transmitted bacterium that often causes no symptoms. It may be performed on urine or a swab collected from the genital area.

Why might I need this test?

Testing may be recommended after a new sexual partner, unprotected sex, symptoms of infection, or routine screening. It is also commonly used to confirm whether a previously positive result is accurate.

How is the test performed?

A urine sample or genital swab is collected and tested in a laboratory for evidence of Chlamydia. The laboratory method may detect the organism's genetic material or other substances associated with it.

How do I prepare for the test?

Follow the collection instructions provided by your healthcare professional. If a urine test is needed, you may be asked not to urinate for 1 to 2 hours beforehand; otherwise, special preparation is usually not required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

A positive result may indicate a current chlamydia infection, which can involve the cervix, urethra, rectum, or throat depending on the site tested. A negative result means the organism was not detected, but rarely a very early infection may not be picked up. Results that do not match the symptoms or prior findings should be discussed with a healthcare professional, who may recommend repeat testing.

Short name

Chlamydia test

Frequently asked questions

What does a positive chlamydia test mean?
A positive result usually means that Chlamydia trachomatis is present and should be evaluated and treated by a healthcare professional.
Can I have chlamydia without symptoms?
Yes. Chlamydia often causes no symptoms, so testing is important even when you feel well.
Does a negative result rule out chlamydia completely?
A negative result means the test did not detect chlamydia. In rare cases, an infection acquired very recently may not be detected, so repeat testing can be considered if exposure or symptoms are concerning.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy