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Serum or plasma mass concentration of muramidase (lysozyme)

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

This test measures the amount of lysozyme, an enzyme that helps fight bacterial infections, in your blood.

Quick summary

["Lysozyme helps protect your body from certain bacteria and may indicate immune function or infection status."]

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

Key facts at a glance

LOINC
44602-1
Short code
M-IgM Ur Ql IFE
Synonyms
M-IgM Ur Ql IFE
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
immunofixation
CPT
82784
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 Lysozyme?

Lysozyme is a naturally occurring enzyme found in many bodily fluids, including tears, saliva, and mucus. It works by breaking down the cell walls of certain bacteria, helping to prevent infections. In blood tests, lysozyme levels can reflect immune system activity or response to inflammation.

Why Might You Need This Test?

Your healthcare provider may order a lysozyme test if you have symptoms of infection, immune disorders, or conditions like cystic fibrosis, where lysozyme levels can be lower. It may also be used in research or specialized diagnostic contexts.

What Does a Result Mean?

Results can vary based on health status, but abnormal levels may suggest immune dysfunction, infection, or other underlying conditions. Always discuss your results with your doctor.

Common Causes of Abnormal Results

Low lysozyme levels may be linked to chronic infections, immune deficiencies, or certain genetic disorders. High levels could indicate acute infection or inflammation, though this is less common.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test is primarily used in research or specialized clinical settings to assess immune function or bacterial susceptibility. It is not a standard diagnostic tool for most routine medical conditions.

Short name

Lysozyme Level

Frequently asked questions

Why might lysozyme testing be done in certain situations, like research or rare conditions?
Lysozyme testing may be used in specialized studies, such as evaluating immune responses in cystic fibrosis patients or studying bacterial resistance mechanisms. It’s not routinely performed for general health checks.
How is lysozyme tested?
The test involves collecting blood (serum or plasma) and measuring lysozyme concentration using enzymatic methods. Results are typically reported as mass concentration units.
Are there any risks or side effects from this test?
Blood tests are generally safe with minimal risks. Possible side effects include mild bruising or discomfort at the needle site. No specific precautions are needed beyond standard blood draw guidelines.
  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