New Vidas assay for Toxoplasma-specific IgG avidity: evaluation on 603 sera.

After the development of the new version of the test Vidas Toxo IgG with antigens obtained from tachyzoites cultured on cells, a Vidas avidity test has been recently developed. The aim of this study was to assess the value of the determination of avidity on the new Vidas test. This avidity test was performed on 553 sera obtained from pregnant women whose dates of infection had been determined and on 50 sera obtained from immunosuppressed patients.

Comparative analysis of the VIDAS Toxo IgG IV assay in the detection of antibodies to Toxoplasma gondii.

A new serological test, Vidas Toxo IgG IV, has been developed with antigens obtained from tachyzoites cultured on cells. Vidas Toxo IgG IV replaces Vidas Toxo IgG II by offering a more standardized antigenic production and a lower number of indeterminate results while retaining equivalent sensitivity and specificity.