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Chlamydia trachomatis nucleic acid detection in stool by qualitative polymerase chain reaction (PCR)

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

This test checks for the presence of genetic material from *Chlamydia*, a common bacterial infection that can affect the digestive tract. It helps determine if you may have an infection that requires treatment.

Quick summary

["A positive result may indicate an infection needing medical evaluation and treatment."]

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

Key facts at a glance

LOINC
35730-1
Short code
Chlamydia rRNA Spec Ql Probe
Synonyms
Chlamydia rRNA Spec 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 Done

Your healthcare provider may recommend this test if you have symptoms like stomach pain, diarrhea, or unexplained weight loss. It’s also used in certain screening programs for sexually transmitted infections (STIs) that can affect the digestive system.

What to Expect Before the Test

No special preparation is needed. You’ll provide a stool sample, which is collected in a container provided by your lab. Follow any instructions given to you to ensure accurate results.

How the Test Works

The test uses a molecular method (PCR) to detect the genetic material of *Chlamydia*. This process identifies if the bacteria are present in your stool, even if you’re not yet showing symptoms.

What the Results Mean

A positive result means the test found genetic material from *Chlamydia*. This suggests an active infection that your doctor may treat with antibiotics. A negative result means no genetic material was detected, but symptoms could still be due to other causes.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Chlamydia PCR stool test

Frequently asked questions

How long does it take to get results?
Results are typically available within 1 to 3 business days, depending on your lab’s processing schedule.
What if I have symptoms but the test is negative?
A negative result doesn’t rule out all causes of your symptoms. If you continue to experience digestive issues, discuss them with your healthcare provider. They may recommend additional tests or further evaluation.
Can I take antibiotics before the test?
Yes, but inform your healthcare provider immediately if you start antibiotics before receiving your results. They may need to adjust your testing or treatment plan.
  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