• What symptoms might lead a doctor to request this test?

The mother often shows no specific symptoms. The test is typically requested based on initial screening results showing positive IgG and IgM, or if a pregnant woman has been exposed to cats or undercooked meat.

• What does a high avidity result indicate?

High avidity indicates that the antibodies are mature and bind strongly to the antigen, which suggests that the infection is not recent.

Medical Laboratories

Toxoplasmosis Avidity Test

Toxoplasmosis IgG Antibody Avidity Test

An advanced test to differentiate between old and recent Toxoplasmosis infections during pregnancy, providing peace of mind and accurately determining fetal risk levels for necessary medical interventions.

Trusted medical contentUpdated: 04-09-2026Views: 28LHL-2352

Conditions and notices

Fasting is not required

Fasting: Not required.

Sample type: Venous blood sample.

The essential requirement: The IgG test result for Toxoplasma must be positive for the affinity test to have meaning.

Timing: It is performed as soon as positive IgG and IgM results appear during pregnancy. The earlier it is performed (after weeks 16-18), the more significant it is.

Frequently Asked Questions

Short answers to the FAQs published with this service.

• What is the primary purpose of the Toxoplasmosis IgG Avidity test?

The test is used to distinguish between a past infection (occurring before pregnancy) and a recent infection (occurring during pregnancy) in pregnant women who have tested positive for both IgG and IgM antibodies.

• Who should consider undergoing this test?

The test is intended for pregnant women with positive IgG and IgM results in routine screening, those exposed to potential sources of infection such as cats or raw meat, or in cases where determining the timing of the infection is necessary for clinical decisions.

• Does the Toxoplasmosis IgG Avidity test require fasting?

No, fasting is not required for this laboratory blood test.

• How does this test assist in managing pregnancy?

Toxoplasmosis Avidity Test

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Conditions and notices

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