Place of Interferon-γ Assay for Diagnosis of Congenital Toxoplasmosis

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The diagnosis of congenital toxoplasmosis relies mainly on serology. When results are doubtful, pediatricians have difficulties with respect to treatment. We report interferon-γ responses after the stimulation of blood by Toxoplasma gondii antigen in 17 infected infants and 80 infants free of infection. Sensitivity and specificity were 93.75% (95% confidence interval: 67%–99%) and 98.75% (95% confidence interval: 92%–99%), respectively.

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