Candida IgG Immunoassay (Serum/Plasma)
This test measures your body’s immune response to *Candida* yeasts, which can live in your mouth, gut, or skin. It helps determine if you’ve been exposed to these organisms, though it doesn’t confirm an active infection.
["This test helps assess past exposure to *Candida* yeasts, not current infection status."]
Key facts at a glance
- LOINC
- 40825-2
- Short code
- CANDG
- Synonyms
- Candida IgG Titr Ser
- Category
- chemistry
- Sample
- serum
- Container
- Serum separator tube (SST) or red-top tube without anticoagulant
- Units
- N/A
- Ref low
- 0
- Ref high
- 1
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- Enzyme Immunoassay (EIA) or Immunofluorescence Assay (IFA) for detection and titration of Candida-specific IgG antibodies
- CPT
- 86645
- SNOMED
- 122559005
- Specimen volume
- 1-2 mL of serum (minimum 0.5 mL)
- Stability
- Serum stable at room temperature for 8 hours; refrigerated at 2-8°C for 7 days; frozen at -20°C or below for up to 30 days; avoid repeated freeze-thaw cycles
- Hemolysis max
- 200
- Lipemia max
- 100
- Icterus max
- 20
- TAT
- 48–120 hours
- Order
- routine
What Does This Test Measure?
The test detects antibodies (IgG) your immune system produces in response to *Candida* yeasts. These antibodies indicate prior exposure, but they don’t prove whether you have an active infection. The presence of these antibodies suggests your body has encountered *Candida* at some point, possibly from ingestion, skin contact, or other routes.
Why Might You Need This Test?
Doctors may order this test if you have symptoms like persistent mouth sores, skin rashes, or digestive issues that could suggest *Candida* exposure, especially if you’ve had recent antibiotic use, weakened immunity, or other risk factors. It’s also sometimes used in research or monitoring for certain conditions.
How Is the Test Performed?
A blood sample is drawn from a vein in your arm. The blood is sent to a lab, where it’s tested for IgG antibodies against *Candida* using an immunoassay method. This process typically takes a few days to complete.
What Are Possible Results?
Results are qualitative (positive or negative) and indicate whether detectable IgG antibodies were found. A positive result suggests past exposure, but it doesn’t confirm an active infection. A negative result means no detectable antibodies were found, though this doesn’t rule out past exposure.
Reference range
Titer <1:160 (Negative); Titers vary by laboratory method. Generally, titers ≥1:160 suggest prior exposure or colonization; significantly elevated titers (≥1:640) may indicate systemic or invasive candidiasisN/A
No special patient preparation required. Specimen should be collected prior to administration of antifungal therapy when possible, as treatment may affect antibody titers
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
IgG Antibody to Candida
Frequently asked questions
How Does This Test Help Your Doctor?
What Does a Positive Result Mean?
What If My Test Result Is Negative?
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 15, 2026. · Read our editorial policy