Diagnostic Value of IgG Avidity inToxoplasmaInfection: Comparison of 3 Commercial Kits

Abstract

To the Editor —To improve serologic diagnosis of Toxoplasma gondii infection, an assay was developed that measures the antigen-binding avidity of specific IgG antibodies. Recently, Liesenfeld et al. [1] strongly suggested the value of IgG avidity testing using a single serum sample, during the first trimester of pregnancy, to discriminate between past or recent infection