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Toxicity Screening Panel for Giardia lamblia (Qualitative, Immunoassay)

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

This test checks for antibodies that your immune system produces in response to *Giardia lamblia*, a parasite that can cause gastrointestinal infections.

Quick summary

["Helps diagnose Giardia infection by detecting immune system markers."]

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

Key facts at a glance

LOINC
110928-9
Short code
T gondii IgM Msmt CSF
Synonyms
T gondii IgM Msmt CSF
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

What This Test Measures

The test detects specific antibodies (immunoglobulins) in your blood that target *Giardia lamblia* antigens. These antibodies indicate whether your body has been exposed to the parasite, even if symptoms are not currently present.

How the Test Works

A small blood sample is taken, and the lab uses an immunoassay method to identify the presence of Giardia-specific antibodies. This method detects the immune response rather than the parasite itself.

Why It Matters

While this test cannot confirm an active infection, it can suggest past exposure or chronic infection if symptoms like diarrhea, bloating, or stomach pain persist. Further testing (e.g., stool samples) may be needed for active diagnosis.

Common Symptoms of Giardia Infection

Giardia often causes symptoms like persistent diarrhea, stomach cramps, bloating, nausea, or gas. Some people may have no symptoms at all, especially if the infection is mild or chronic.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Giardia Antibody Screen

Frequently asked questions

Why might my doctor order this test?
Your doctor may recommend this test if you have recurring gastrointestinal symptoms (e.g., diarrhea, bloating) that don’t improve with usual treatments, or if you’ve traveled to areas with higher parasite risk. It’s also used in screening for chronic infections in immunocompromised individuals.
What does a positive result mean?
A positive result means your body has detected Giardia antibodies, indicating past exposure. However, it doesn’t confirm an active infection—you may still need additional testing (like stool exams) to diagnose an ongoing problem.
What if my test is negative?
A negative result means no detectable antibodies were found, suggesting no prior exposure or current infection. If symptoms persist, other causes (e.g., food intolerance, other infections) should be evaluated.
  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