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Conjunctival Conjunctivitis (Conjunctival Inflammation) Antibody Profile (Screening)

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

This test checks for antibodies related to inflammation in your conjunctiva—the clear tissue covering the white part of your eye and inside your eyelids. It may help identify causes of redness, irritation, or swelling.

Quick summary

["This screening helps determine if your immune response is linked to eye inflammation."]

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

Key facts at a glance

LOINC
31769-3
Short code
C trach Ag Conjunct Ql
Synonyms
C trach Ag Conjunct Ql
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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

What This Test Measures

The test detects specific antibodies (immune proteins) that may be present if your body is reacting to inflammation in the conjunctiva. These antibodies could be linked to conditions like conjunctivitis (pink eye), allergic reactions, or infections.

Why It’s Done

Your healthcare provider may order this test if you have persistent eye redness, swelling, or discomfort that doesn’t improve with usual treatments. It can help rule out immune-related causes of eye irritation.

What to Expect

A small blood sample is taken from your arm. The sample is then analyzed to check for certain antibody markers. Results are typically reported as positive or negative for the presence of these antibodies.

Common Causes of Positive Results

Positive results may suggest an immune response to inflammation in the conjunctiva, potentially due to conditions like allergic conjunctivitis, viral/bacterial infections, or other inflammatory eye diseases. Not all positive results indicate a specific diagnosis—further evaluation may be needed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Conjunctivitis Antibody Screen

Frequently asked questions

Will this test show if I have pink eye (conjunctivitis)?
This test checks for antibodies related to inflammation but doesn’t diagnose pink eye directly. If you have symptoms like redness, discharge, or swelling, see your doctor for evaluation, which may include clinical assessment or additional tests.
What does a positive result mean?
A positive result means your blood contains certain antibodies linked to inflammation in the conjunctiva. This could suggest an immune response, but it doesn’t confirm a specific diagnosis. Your healthcare provider will discuss next steps, such as further testing or treatment options.
Is this test painful?
The blood draw is typically mild discomfort for a few seconds. Most people find it quick and manageable. If you’re anxious, let your healthcare provider know so they can prepare you appropriately.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

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