Microbiological examination of mucous threads in respiratory secretions (qualitative)
This test checks for the presence of mucous threads (filaments) in your sputum, which can help identify certain respiratory conditions.
["A qualitative test to assess potential mucus abnormalities in your respiratory tract."]
Key facts at a glance
- LOINC
- 8247-9
- Short code
- Mucous Threads UrnS Ql Micro
- Synonyms
- Mucous Threads UrnS Ql Micro
- Category
- chemistry
- Sample
- urine
- Container
- Sterile urine container
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- microscopy-light
- Specimen volume
- 10 mL
- Stability
- Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
What Is Mucous Threads in Sputum Testing Used For?
This test may be used to evaluate conditions such as chronic bronchitis, cystic fibrosis, or other respiratory diseases where excessive mucus production or abnormal mucus structures are suspected. It can also help monitor treatment effectiveness or guide further diagnostic steps, such as culture tests for infections.
How Is the Test Performed?
You will cough into a sterile container to collect sputum. The sample is then examined under a microscope to detect mucous threads. No special preparation is typically required, but you may be asked to rinse your mouth with water before spitting into the container.
What Does a Positive Result Mean?
A positive result for mucous threads indicates the presence of abnormal mucus filaments, which may suggest conditions like bronchiectasis, chronic obstructive pulmonary disease (COPD), or other mucus-related respiratory disorders. Further testing, such as microbiological cultures or imaging, may be needed to determine the underlying cause.
What Does a Negative Result Mean?
A negative result means no mucous threads were detected in your sample. However, this does not rule out other respiratory issues; additional tests may still be necessary to diagnose your condition accurately.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Mucous Threads in Sputum (Qualitative)
Frequently asked questions
Why might my doctor order this test?
Can this test detect infections?
How soon will I get results?
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