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Chlamydia trachomatis Nucleic Acid Test (Genital Tract) - Qualitative

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

This test detects genetic material from *Chlamydia trachomatis*, a common bacterial infection that can cause reproductive health issues if untreated.

Quick summary

["Screening for chlamydia helps prevent complications like pelvic inflammatory disease or infertility."]

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

Key facts at a glance

LOINC
20757-1
Short code
Chlamydia Ag Tiss Ql IF
Synonyms
Chlamydia Ag Tiss Ql IF
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
if
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

This test measures the level of a specific substance in your body, giving your healthcare provider important information about how certain organs and body systems are functioning. By analyzing a small sample, the test shows whether your levels fall within a normal range or suggest a condition that may need closer attention or further evaluation.

The test looks for the genetic material (nucleic acids) of *Chlamydia trachomatis* in a sample from the genital tract, such as cervical, vaginal, or urethral swabs. It does not measure antibodies or other immune responses—it directly identifies the bacteria’s DNA.

Your doctor may order this test as part of a routine checkup, to help find the cause of symptoms you are experiencing, or to monitor an ongoing condition and see how well your treatment is working. It can also be used to screen for potential health risks before they become more serious, allowing earlier care and better long-term outcomes.

Your healthcare provider may recommend this test if you have symptoms like unusual discharge, pain during urination, or if you’re at higher risk (e.g., sexually active under 25, new partners, or history of STIs). It’s also part of routine screening for sexually active individuals.

A trained healthcare professional will collect your sample, most often a small amount of blood drawn from a vein in your arm using a thin needle. The process usually takes only a few minutes, and you may feel a brief pinch. In some cases, a urine or swab sample may be collected instead. The sample is then labeled and sent to a laboratory for analysis.

A healthcare provider will collect a sample from your genital area using a sterile swab. The sample is then sent to a lab for analysis. No special preparation is needed, but avoid bathing or using vaginal products 24 hours before testing.

Your results will typically show whether your values fall within the normal reference range for this test. Values outside that range do not automatically mean you have a disease, since factors like age, medications, diet, and overall health can affect the numbers. Your provider will review the results with you, explain what they mean in context, and recommend any follow-up testing or treatment.

A positive result means the test detected *Chlamydia trachomatis* DNA, indicating an active infection. A negative result means the bacteria were not found in the sample at the time of testing. Follow-up testing or retesting may be advised if symptoms persist.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Chlamydia AGT (Genital Tract)

Frequently asked questions

Chlamydia is a common bacterial infection spread through sexual contact. Left untreated, it can cause long-term health problems like chronic pelvic pain, infertility, or ectopic pregnancy. Early detection and treatment with antibiotics can prevent these complications.
A positive result generally means the test detected the substance or marker it was designed to find, which could point to a current infection, an immune response, or another condition that needs attention. Because false positives can occur, your provider may repeat the test or order additional studies before making a diagnosis or starting any treatment.
A positive result means you have an active *Chlamydia trachomatis* infection. Treatment with antibiotics (usually doxycycline or azithromycin) is recommended to clear the infection. Both you and your sexual partners should be treated to prevent reinfection.
Turnaround time depends on the specific test and the laboratory performing it. Many routine tests are completed within one to three days, while more specialized tests may take a week or longer. Once the lab releases your results, your healthcare provider will review them and contact you, or you may be able to view them through your patient portal.
Results are typically available within 2–5 business days. If you have urgent concerns, ask your provider about expedited follow-up options.
No, you must complete a full course of prescribed antibiotics. Untreated chlamydia can cause serious health issues, and self-treatment may not fully clear the infection.
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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