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Macrophage Count in Bronchial Fluid

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

This test measures the number of macrophages present in your sputum sample, which may help assess lung inflammation or infection.

Quick summary

["Macrophages in sputum can signal inflammation or infection in your airways."]

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

Key facts at a glance

LOINC
30425-3
Short code
Macrophages NFr Bronch
Synonyms
Macrophages NFr Bronch
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like persistent cough, chest discomfort, or suspected lung conditions such as bronchitis, pneumonia, or chronic obstructive pulmonary disease (COPD). It can also be used to monitor lung health in certain chronic illnesses.

What to Expect Before the Test

You’ll likely cough into a sterile container to collect sputum. If you have difficulty producing sputum, your provider may guide you through techniques to clear your airways. Avoid smoking or using respiratory irritants before the test.

What the Test Results Mean

Higher-than-normal macrophage counts may indicate inflammation, infection, or other lung conditions. Lower-than-expected counts could suggest a lack of immune response in the airways. Results are interpreted by your healthcare provider in the context of your symptoms and medical history.

Common Conditions Monitored

This test is often used to diagnose or monitor conditions like chronic bronchitis, cystic fibrosis, or other inflammatory lung diseases. It may also help evaluate responses to treatments for lung infections or chronic respiratory conditions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Macrophage Count in Sputum

Frequently asked questions

What does a high macrophage count in sputum mean?
A high macrophage count may suggest inflammation, infection (such as bacterial pneumonia or bronchitis), or other lung conditions like asthma or COPD exacerbation. Your provider will discuss findings with you based on your symptoms and test results.
Can this test replace a chest X-ray or CT scan?
No, this test provides a snapshot of macrophage presence in sputum but does not visualize lung structures like an X-ray or CT scan. These imaging tests are used for different diagnostic purposes, such as identifying structural issues in the lungs.
How soon will I get my results?
Results are typically available within 1 to 3 business days, depending on lab processing times. Your healthcare provider will contact you to discuss the results and next steps.
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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