Candida (yeast) colony count from stool culture with color observation
This test checks for the presence of yeast (such as Candida) in your stool sample. It helps determine if an infection with yeast is present or if there’s an overgrowth that may need medical attention.
A stool yeast culture helps identify if yeast is growing abnormally, which could signal a fungal infection or imbalance in gut bacteria.
Key facts at a glance
- LOINC
- 97944-3
- Short code
- Yeast colony w CGB Islt Cult-Color
- Synonyms
- Yeast colony w CGB Islt Cult-Color
- Category
- glucose
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 10
- Ref high
- 40
- Critical range
- — – 500 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- culture
- CPT
- 84484
- SNOMED
- 302774002
- 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 persistent diarrhea, abdominal pain, or other signs of gastrointestinal issues that could be caused by an overgrowth of yeast in your digestive system. It’s also used to monitor people with weakened immune systems or those taking antibiotics, which can disrupt normal gut bacteria and yeast balance.
How the Test Works
A small sample of your stool is collected and placed on a special growth medium. The sample is then incubated to allow yeast to grow. After a few days, the test technician examines the culture under a microscope to count yeast colonies and observe their color, which can help identify the type of yeast present.
What to Expect Before the Test
You may need to prepare by avoiding certain foods or medications that could interfere with the test results, such as probiotics or certain antibiotics. Follow your healthcare provider’s instructions carefully.
What to Expect During the Test
The test involves collecting a stool sample, which is typically done by passing a small container through your rectum. This is usually quick and painless. No special preparation beyond following dietary instructions is needed unless advised otherwise.
Reference range
Adult: 10-40 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Positive results indicating excessive yeast growth may suggest a condition like candidiasis (yeast infection) in the gastrointestinal tract. This can cause symptoms like chronic diarrhea, bloating, or other digestive issues. It’s important to discuss your results with your healthcare provider, as treatment may include antifungal medications or adjustments to your diet and medications.
Short name
Stool Yeast Culture with Color
Frequently asked questions
How long does it take to get the results of this test?
What does a positive result mean?
Can I eat or drink anything before the test?
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 17, 2026. · Read our editorial policy