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Chlamydia trachomatis and Neisseria gonorrhoeae Testing

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

Tests for Chlamydia trachomatis and Neisseria gonorrhoeae, the bacteria that cause chlamydia and gonorrhea. The test may use a urine sample or a swab from an affected area.

Quick summary

["This test checks for chlamydia and gonorrhea, which are common bacterial sexually transmitted infections."]

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

Key facts at a glance

LOINC
85687-2
Short code
Tx for C trachomatis or N gonorrhoeae
Synonyms
Tx for C trachomatis or N gonorrhoeae
Category
liver
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 the bacteria Chlamydia trachomatis and Neisseria gonorrhoeae in a patient sample. Chlamydia and gonorrhea can infect the cervix, vagina, penis, rectum, throat, or other areas, and some people have no symptoms.

Why might I need this test?

Testing may be recommended after a new sexual partner, unprotected sex, symptoms of a sexually transmitted infection, or contact with an infected partner. It may also be included as routine screening, such as during pregnancy or when sexually active with a new partner.

How is the test performed?

A laboratory test is performed on a urine sample or a swab collected from the area being evaluated. The sample is checked for the presence of the bacteria or their genetic material, depending on the laboratory method. Your healthcare professional will explain which sample is needed.

How do I prepare for the test?

Follow the instructions provided by your healthcare professional or the laboratory. Urine testing may require that you do not urinate for a period of time beforehand, and swab-based testing may have specific collection instructions. Tell your clinician if you recently took antibiotics.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Chlamydia and Gonorrhea Testing

Frequently asked questions

Does a negative result rule out chlamydia and gonorrhea?
A negative result means the bacteria were not detected by this test. However, a very recent infection or a sample collected from an area other than the infected area can occasionally lead to a false-negative result, so your clinician will interpret the result with your symptoms and exposure history.
Can I have chlamydia or gonorrhea without symptoms?
Yes. Many people have no symptoms, especially early in the infection. Testing is therefore important even when you feel well if you have had a possible exposure or are recommended for routine screening.
What should I do if my test is positive?
Contact your healthcare professional promptly. Chlamydia and gonorrhea are usually treatable, but treatment should be guided by a clinician and may require follow-up testing and evaluation of sexual partners.
  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