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Thermophilic Sulfite-Reducing Clostridium Species Count (Quantitative Culture)

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

This test checks for the presence of specific bacteria in your stool that thrive in warm conditions. It helps identify if these bacteria are growing, which may be linked to gastrointestinal health or infection.

Quick summary

["A quantitative culture helps assess bacterial presence in your stool sample for potential gastrointestinal concerns."]

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

Key facts at a glance

LOINC
97937-7
Short code
Thermotol Islt Cult
Synonyms
Thermotol Islt 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
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

What This Test Measures

The test involves growing bacteria from your stool sample at a warm temperature (typically 37–45°C) to detect thermophilic *Clostridium* species that reduce sulfite. This process helps identify if these bacteria are present in measurable quantities.

Why It’s Done

Your healthcare provider may order this test if you have symptoms like diarrhea, bloating, or other gastrointestinal issues that could suggest bacterial overgrowth or infection. It’s also used in research or specialized diagnostic settings for certain conditions.

Sample Collection

A stool sample is collected (usually via a clean container) and sent to the lab. The lab then grows the sample under specific conditions to detect and count thermophilic *Clostridium* species.

What to Expect

Results take several days to a week, as cultures require incubation. You’ll receive a count of bacteria present (if any) or a negative result, depending on detection.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Thermophilic Clostridium Culture (Sulfite-Reducing)

Frequently asked questions

Thermophilic *Clostridium* species are rare in healthy individuals but may indicate gastrointestinal issues, such as bacterial overgrowth or infections. Results help guide treatment decisions if symptoms persist.
This test is not typically used for routine screening. It’s usually reserved for specific clinical scenarios, such as diagnosing suspected bacterial overgrowth or research purposes.
How long does it take to get results from this test?
Results usually take 5–10 business days, depending on lab processing times. Your healthcare provider will discuss the results with you.
Can I take antibiotics before this test?
Yes, you may take antibiotics, but inform your provider beforehand. They may adjust testing instructions if needed to avoid interfering with 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