Toxoplasma Avidity IgG Test
Also known as: Toxoplasma IgG Avidity Test
Toxoplasma Avidity IgG Test test available at DNA Labs India for ₹679. Uses Enzyme Immunoassay on Serum samples. Results in Same-day reports available for samples received by 9 am on Mon/Wed/Fri.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr Pasupathy Arumugam
Consultant Pathologist · Reg: 21521
Last reviewed: September 7, 2026
Overview
The purpose of the Toxoplasma Avidity IgG Test is to diagnose the stage of Toxoplasma gondii infection by assessing the avidity of IgG antibodies. It helps differentiate between acute and chronic infections, guiding clinical management, especially in high-risk groups like pregnant women.
- Test Code
- 1455
- Price
- ₹679
- Sample Type
- Serum
- Result Time
- Same-day reports available for samples received by 9 am on Mon/Wed/Fri.
- Fasting Required
- No
- Method
- Enzyme Immunoassay
Sample Collection
No special preparation is required. Inform your healthcare provider about any medications or recent infections.
Method: Venipuncture
Laboratory Analysis
A blood sample will be drawn from a vein in your arm. The process takes a few minutes and may cause minor discomfort.
Report Delivery
Apply pressure to the puncture site to prevent bruising. You can resume normal activities immediately.
Timeline: Same-day reports available for samples received by 9 am on Mon/Wed/Fri.
Patient Instructions
About This Test
Who Should Get This Test
The purpose of the Toxoplasma Avidity IgG Test is to diagnose the stage of Toxoplasma gondii infection by assessing the avidity of IgG antibodies. It helps differentiate between acute and chronic infections, guiding clinical management, especially in high-risk groups like pregnant women.
How to Prepare
- Collect 2 mL of blood in a Serum Separator Tube (SST)
- Ship sample refrigerated or frozen as per stability guidelines
- Ensure proper labeling and handling to avoid sample rejection
Doctor's Notes
Reviewed by Dr Pasupathy Arumugam — MBBS, MD (Pathology) · Reg. No. 21521
"The Toxoplasma Avidity IgG Test is essential for differentiating between recent and past Toxoplasma infections, which is critical for managing patient care, especially in pregnant women to prevent congenital toxoplasmosis."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Hemolyzed or severely lipemic samples
- Samples with insufficient volume
- Improperly labeled or contaminated tubes
Understanding Your Results
Indicative of recent (acute) Toxoplasma gondii infection, likely within the last 3-4 months.
High risk for congenital transmission in pregnant women; immediate medical consultation is advised.
Range: Avidity Index <30%
Equivocal result; may represent transition between acute and chronic infection.
Repeat testing in 2-4 weeks or additional diagnostic tests recommended for clarification.
Range: Avidity Index 30-40%
Indicative of past (chronic) infection, likely more than 4 months ago.
Lower risk for acute complications; however, monitor for reactivation in immunocompromised patients.
Range: Avidity Index >40%
Consult a healthcare provider if you experience symptoms of toxoplasmosis, have been exposed to the parasite, are pregnant, or if test results are positive or equivocal for further evaluation and management.
Limitations
- ⚠Does not detect IgM antibodies; for acute infection confirmation, IgM testing may be needed
- ⚠Equivocal results (30-40%) may require repeat testing after 2-4 weeks
- ⚠Cannot determine the exact timing of infection; clinical correlation is necessary
Risks & Considerations
- ●Minor bruising or pain at the blood draw site
- ●Rare risk of infection or excessive bleeding
Interfering Factors
- ●Hemolyzed or lipemic samples may affect accuracy
- ●Recent blood transfusions could influence antibody levels
- ●Cross-reactivity with other parasitic infections is possible but rare
Frequently Asked Questions
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