Table 1.

Contribution of each biological test for congenital toxoplasmosis diagnosis

Biological test	No. of infected children with positive biological test (n = 118)
Prenatal diagnosis (amniotic fluid) (PCR targeting the 529-bp repeat element and/or gene B1)	49
Neonatal IgM serology (<1 mo of life) (Toxo-ISAGA [bioMérieux]; IgM Enzygnost Toxoplasmosis [Dade Behring])	54
Neonatal IgA serology (<1 mo of life) (Toxo-ISAGA [bioMérieux]; ToxoIgA [SFRI])	56
Persistence of IgG within 12 mo (VIDIA Toxo IgGII [bioMérieux]; VIDAS Toxo IgG [bioMérieux]; IgG Enzygnost Toxoplasmosis [Dade Behring])	18
Immunoblot mother-infant profile comparison (Toxoplasma WB IgG IgM [LD-Bio])	93