Chlamydia trachomatis Nucleic Acid Test (Genital Tract) - Qualitative
This test detects genetic material from *Chlamydia trachomatis*, a common bacterial infection that can cause reproductive health issues if untreated.
["Screening for chlamydia helps prevent complications like pelvic inflammatory disease or infertility."]
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 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.
Results are typically available within 2–5 business days. If you have urgent concerns, ask your provider about expedited follow-up options.
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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