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Fungal culture with sensitivity testing (specimen: stool)

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

This test checks for the presence of fungi in your stool and identifies which, if any, antifungal medications might work best against them.

Quick summary

["Helps diagnose fungal infections in your digestive system and guides treatment choices."]

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

Key facts at a glance

LOINC
21003-9
Short code
Fungus Spec Fungus Stn
Synonyms
Fungus Spec Fungus Stn
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
fungus-stain
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 involves growing stool samples in a controlled environment to detect fungal organisms. If fungi are present, the culture will show their growth patterns, and further testing (sensitivity) determines how they respond to common antifungal drugs.

Why It’s Ordered

Your healthcare provider may recommend this test if you have symptoms like persistent diarrhea, unexplained weight loss, or signs of a fungal infection (e.g., immune system issues, recent antibiotic use, or travel to high-risk areas).

How the Test Works

A small sample of your stool is collected and sent to a lab. The sample is mixed with special growth media to encourage fungal growth. Over days to weeks, the lab checks for fungal colonies and, if needed, tests how they react to antifungal medications.

What to Expect Before the Test

No special preparation is needed, but avoid taking antifungal medications for at least 2 weeks before testing if possible. Bring any recent medications to discuss with your provider.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Positive results confirm a fungal infection in your digestive tract, which can cause severe illness, especially in people with weakened immune systems. Identifying the specific fungus and its drug resistance helps tailor treatment to avoid ineffective or harmful medications.

Short name

Stool Fungal Culture & Antibiogram

Frequently asked questions

How long does it take to get results?
Results typically take 5–14 days, depending on fungal growth and sensitivity testing. Some labs may provide preliminary findings sooner.
What does a positive result mean?
A positive result means fungi were detected in your stool. This doesn’t always mean an infection is causing symptoms—further evaluation (like blood tests or imaging) may be needed to confirm and guide treatment.
Can I take antifungal medications before the test?
No, avoid antifungal medications for at least 2 weeks before testing unless directed otherwise by your provider, as they may interfere with the test results.
  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