Escherichia coli (E. coli) DNA in Stool by Probe-Based Detection
This test checks for genetic material from *Escherichia coli* bacteria in your stool. It helps identify infections caused by this common gut bacterium, which can sometimes lead to illness.
["Detects harmful bacteria in stool to guide treatment for infections."]
Key facts at a glance
- LOINC
- 103176-4
- Short code
- E coli EIEC DNA Wnd Ql NAA+probe
- Synonyms
- E coli EIEC DNA Wnd Ql NAA+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-amp-tar
- 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 order this test if you have symptoms like diarrhea (especially with blood or mucus), abdominal pain, fever, or if you’ve been exposed to *E. coli* (e.g., through contaminated food or water). It’s also used in screening for certain types of gastrointestinal infections or after travel to high-risk areas.
How the Test Works
A small sample of your stool is collected and analyzed using a specialized probe to detect *E. coli* DNA. This method is highly sensitive and can identify the presence of the bacteria even when other tests might not detect active infection.
Sample Collection
You’ll provide a fresh stool sample (usually collected in a sterile container) during a visit to your doctor’s office or clinic. No special preparation is needed, but avoid using toilet paper or urine in the sample.
What to Expect After the Test
Results are typically ready within 24–48 hours. If *E. coli* DNA is found, your provider will discuss next steps, which may include antibiotics, lifestyle changes, or further testing to determine the exact strain and severity of infection.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
E. coli DNA Stool Probe Test
Frequently asked questions
This test is important because *E. coli* infections can range from mild stomach upset to severe illnesses like urinary tract infections, kidney failure, or even life-threatening conditions (e.g., hemolytic uremic syndrome). Early detection helps prevent complications and guides appropriate treatment.
Results are usually available within 24 to 48 hours after the lab processes your sample. Your healthcare provider will contact you directly with the results.
No special diet is required, but avoid using toilet paper or urine in the sample. If you’re unsure, ask your provider for specific instructions.
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