Toxicity Screening for Giardia lamblia (Serum/Plasma)
This test checks for antibodies in your blood that may indicate past or current infection with Giardia lamblia, a parasite that can cause gastrointestinal symptoms like diarrhea, bloating, or stomach cramps.
["This screening helps identify if you’ve been exposed to Giardia, which can affect digestion and comfort."]
Key facts at a glance
- LOINC
- 56991-3
- Short code
- T gondii IgG Avidity SerPl Ql IA
- Synonyms
- T gondii IgG Avidity SerPl Ql IA
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ia
- 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
What This Test Measures
The test detects specific antibodies produced by your immune system in response to Giardia lamblia. These antibodies are part of your body’s defense mechanism against the parasite. If present, they suggest exposure to Giardia, though not necessarily an active infection at the time of testing.
Why It’s Done
Your healthcare provider may recommend this test if you’ve had symptoms like persistent diarrhea, stomach pain, or bloating, especially after traveling to areas with known Giardia outbreaks or if you’ve had recent contact with someone who has the infection.
What to Expect Before the Test
No special preparation is needed for this blood test. You may have a small needle inserted into your arm to draw a blood sample. If you’re nervous, let your healthcare provider know—they can help make it more comfortable.
What to Expect After the Test
After the blood is drawn, you may feel a slight pinch or bruising at the site, which usually goes away quickly. Apply gentle pressure to the area to help stop any bleeding. You can return to your normal activities right away.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Positive results indicate exposure to Giardia lamblia, which can cause gastrointestinal issues. However, antibodies may remain in your system for months or years after infection, so a positive test doesn’t always mean you’re currently infected. If symptoms persist, further testing or follow-up may be needed to determine if treatment is necessary.
Short name
Giardia Antibody Screen
Frequently asked questions
What does a positive result mean?
Can I get treated if my test is positive?
How long does it take to 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