Chlamydia trachomatis Conjunctival Probe (PCR)
This test detects the presence of *Chlamydia trachomatis* DNA in your eye’s conjunctiva using a genetic probe. It helps diagnose infections linked to pink eye or conjunctivitis caused by this bacterial strain.
["A quick, accurate way to check for eye infections caused by a specific bacterial pathogen."]
Key facts at a glance
- LOINC
- 35712-9
- Short code
- Chlamydia rRNA Conjunct Ql Probe
- Synonyms
- Chlamydia rRNA Conjunct Ql 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
- 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
Why This Test Is Used
Your healthcare provider may recommend this test if you have symptoms like redness, swelling, or discharge in your eyes, especially if you suspect an infection. It’s also used in screening for sexually transmitted infections (STIs) that can affect the eyes.
How the Test Works
A small sample of fluid from your conjunctiva (the clear tissue covering the white part of your eye) is collected using a sterile swab. The sample is then analyzed in a lab to detect genetic material from *Chlamydia trachomatis* using a probe-based polymerase chain reaction (PCR) method.
Sample Collection
The procedure is quick and painless. You may feel a slight tug or mild discomfort, but it doesn’t require anesthesia. Avoid touching or irritating your eyes before the test to ensure an accurate sample.
What to Expect After the Test
You can return to your normal activities immediately after the test. If you experience any discomfort, mild redness, or swelling afterward, apply a clean, cool compress to your eyes for relief. Follow up with your provider if you notice worsening symptoms.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
Chlamydia trachomatis is a common bacterial infection that can cause eye infections (conjunctivitis), leading to discomfort, vision changes, or even long-term damage if untreated. Early detection through this test helps prevent complications and allows for prompt treatment with antibiotics.
How long does it take to get results from this test?
Can I take antibiotics before the test if I suspect an eye infection?
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