Understanding Lab Tests for Congenital Toxoplasmosis
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Congenital toxoplasmosis occurs when a pregnant woman becomes infected with Toxoplasma gondii for the first time during pregnancy and passes the infection to her unborn child. This condition can lead to serious complications including premature birth, low birth weight, jaundice, eye damage, and potentially severe brain complications.
Recommended Test
Toxoplasma Antibody (IgG)
This test measures IgG antibodies against Toxoplasma gondii in the blood. It helps determine previous exposure to the parasite and is essential for assessing the risk of congenital toxoplasmosis. If a woman becomes infected with Toxoplasma gondii for the first time during pregnancy, she can transmit the infection to her unborn child, potentially causing serious complications such as premature birth, low birth weight, fever, jaundice, retinal abnormalities, and severe eye and brain damage that may manifest later in life.
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The Role of Blood Testing in Congenital Toxoplasmosis
While the definitive diagnosis of congenital toxoplasmosis in newborns may require specialized testing and clinical evaluation, blood tests play a crucial role in assessing maternal infection status and understanding the risk of transmission. Antibody testing helps determine if a woman has been exposed to the parasite and whether the infection is new or established.
Understanding the Testing Process
Toxoplasma antibody testing is particularly important for pregnant women or those planning pregnancy. The presence and timing of antibody development can help healthcare providers assess infection risk and guide appropriate monitoring and treatment decisions to protect both mother and baby.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis, treatment, and prenatal care guidance.
