Indicator Explainer
CT/NG DNA
Molecular detection of Chlamydia trachomatis and Neisseria gonorrhoeae nucleic acid.
This page explains what the indicator is and how results are interpreted in general terms. Reference ranges depend on the laboratory, the method, and your own situation — no single “normal value” applies to everyone. This page is health information, not a diagnosis. For symptoms, treatment, or urgent concerns, contact a healthcare professional.
When it is tested
Standard test in sexual-health screening and syndromic panels, performed on swabs or first-catch urine.
Reading results
Positive results indicate nucleic acid presence and support treatment decisions made by clinicians; test-of-cure timing and partner-notification procedures follow local clinical guidance. Low-load positives near the detection limit may be repeated per laboratory policy.
Questions to ask a professional
- Which specimen types does this program accept?
- What is the repeat-testing policy for low-positive results?
Related Tests
Tests that measure or involve this indicator.
References
- Updated recommendations for the treatment of Neisseria gonorrhoeae, Chlamydia trachomatis, and Treponema pallidum (syphilis) and new recommendations on syphilis testing and partner services — World Health Organization, 2024 (10.2471/b09109)
- Environmental contamination by Chlamydia trachomatis and Neisseria gonorrhoeae: is it time to change our infection control practices? Results of a regional study. — Sexually transmitted infections, 2023 (PMID doi: 10.1136/sextrans-2021-055360)
- Time to Clearance of Neisseria gonorrhoeae RNA at the Pharynx following Treatment. — Journal of clinical microbiology, 2022 (PMID doi: 10.1128/jcm.00399-22)