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Thermophilic *Clostridium* species culture (stool)

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

This test checks for the presence of certain bacteria (*Clostridium* species) that grow best at higher temperatures in a stool sample. These bacteria can sometimes cause infections.

Quick summary

["This test helps identify possible gastrointestinal infections by detecting harmful bacteria that thrive in warm conditions."]

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

Key facts at a glance

LOINC
10639-3
Short code
Therm Actino Spec Cult
Synonyms
Therm Actino Spec Cult
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
organism-specific-culture
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 Is This Test Done?

Your healthcare provider may order this test if you have symptoms like diarrhea, abdominal pain, or fever that could suggest a bacterial infection in your digestive system. It’s also used to diagnose conditions like pseudomembranous colitis or other infections caused by thermophilic *Clostridium* species.

What Does the Test Involve?

A small sample of your stool is collected in a special container and sent to a lab. The sample is then cultured under conditions that encourage the growth of thermophilic bacteria. If bacteria are present, they will appear as colonies on the culture medium after a few days.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to avoid certain medications that could affect test results. If you have a recent history of antibiotic use, let your provider know.

What to Expect After the Test

Results are typically available within 48 to 72 hours. If bacteria are found, your provider will work with you to determine the best course of treatment, which may include antibiotics.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Thermophilic Clostridium Culture

Frequently asked questions

What does a positive result mean?
A positive result means that thermophilic *Clostridium* bacteria were detected in your stool sample. This could suggest an infection that may need medical attention, including antibiotics tailored to the specific bacteria found.
How long does it take to get results?
Results are usually available within 48 to 72 hours after the sample is processed in the lab.
Can I eat or drink before the test?
No special diet is required, but avoid using laxatives or enemas unless instructed by your provider, as they may affect the stool sample.
  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