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Toxicity Screening for Giardia duodenalis (Serum Antibody)

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

This test checks for antibodies in your blood that may indicate an infection caused by Giardia duodenalis, a common parasite found in contaminated water or food.

Quick summary

["This test helps diagnose Giardia infection, which can cause stomach pain, diarrhea, and other digestive issues."]

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

Key facts at a glance

LOINC
22584-7
Short code
T gondii IgM Titr Ser
Synonyms
T gondii IgM Titr Ser
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
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’ve recently traveled to areas with poor sanitation, have unexplained digestive symptoms like chronic diarrhea, bloating, or stomach cramps, or if you’ve been exposed to contaminated water.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from a vein in your arm. The test is quick and typically done in a lab setting.

What the Test Results Mean

Positive results suggest you may have been exposed to Giardia and could have an infection. Negative results mean no detectable antibodies were found, but this doesn’t always rule out past exposure or infection.

Common Symptoms of Giardia Infection

Symptoms may include watery diarrhea, stomach pain, bloating, gas, nausea, and sometimes a loss of appetite. Some people may not have symptoms at all.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Giardia Antibody Test

Frequently asked questions

What causes Giardia infection?
Giardia is spread through contaminated water or food, often from person-to-person contact with an infected individual or by touching surfaces with the parasite on them.
How is Giardia infection treated?
Treatment usually involves prescription antibiotics to kill the parasite. Your doctor may recommend follow-up tests to confirm the infection has cleared.
Can Giardia infection be prevented?
Yes! Practice good hygiene—wash hands thoroughly after using the bathroom and before eating. Avoid drinking untreated water from natural sources, especially in travel or areas with poor water safety.
  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