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Chlamydia trachomatis Nucleic Acid Detection by Nucleic Acid Amplification Probe (Genital Tract)

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

This test checks for the presence of *Chlamydia trachomatis*—a common bacterial infection that can affect the genitals, throat, or rectum. It uses a genetic probe to detect the infection quickly, often within a few days of testing.

Quick summary

["Detects sexually transmitted bacterial infection with a simple, highly accurate probe-based test."]

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

Key facts at a glance

LOINC
35724-4
Short code
Chlamydia DNA Throat Ql NAA+probe
Synonyms
Chlamydia DNA Throat Ql NAA+probe
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
CPT
87110
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

How the Test Works

A small sample (often collected from the cervix, urethra, throat, or rectum) is taken and analyzed using a specialized probe that targets the genetic material of *Chlamydia*. If the infection is present, the probe binds to its DNA, triggering a detectable signal. This method is highly sensitive and specific, often used as a screening or confirmatory test.

Why You Might Need This Test

Doctors recommend this test if you have symptoms like unusual discharge, pain during urination, or unexplained pelvic pain. It’s also routinely advised for sexually active individuals, especially those with multiple partners, or during routine check-ups. Some health providers use it as part of STI screening, especially for women during annual exams.

What to Expect Before the Test

No special preparation is needed. Your sample may be collected during a pelvic exam (for women), a swab from the urethra (for men), or a throat swab (if infection is suspected in the throat). If testing the rectum, a sterile brush may be used. The procedure is quick and usually painless.

What to Expect During the Test

The test itself is a simple process: a healthcare provider collects the sample, which is then sent to a lab for analysis. Results are typically available within 24–48 hours, depending on the lab’s processing time. You may receive results over the phone, email, or through your healthcare provider’s portal.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Untreated *Chlamydia* can lead to serious complications, including pelvic inflammatory disease (PID) in women, which may cause infertility or chronic pelvic pain. In men, it can cause epididymitis or urethritis. If left untreated, it may also spread to other parts of the body, including the eyes or joints. Early detection and treatment with antibiotics can prevent these complications and reduce transmission to sexual partners.

Short name

Chlamydia Genital Tract Probe Test

Frequently asked questions

How long does it take to get results?
Results are usually available within 24–48 hours, but this can vary by lab. Your healthcare provider will contact you once they have the results.
What does a positive result mean?
A positive result means the test detected *Chlamydia trachomatis* in your sample. This requires immediate treatment with antibiotics to clear the infection. Your partner(s) should also be tested and treated if they have symptoms or were recently exposed.
Can I still have sex while waiting for results?
No, it’s important to avoid sexual contact until you and your partner(s) have completed treatment. This helps prevent spreading the infection. Your healthcare provider will guide you on when it’s safe to resume sexual activity.
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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