A-237 Analytical Performance Evaluation of Cytomegalovirus IgG and Syphilis Assays on the Atellica CI Analyzer

Background The Atellica® CI Analyzer is an automated, high-throughput integrated chemistry and immunoassay analyzer utilizing both Atellica® CH and Atellica® IM Assays. This study evaluated the analytical performance of the Atellica IM Cytomegalovirus IgG (CMV IgG) and Syphilis (Syph) Assays on the Atellica CI Analyzer. Methods Precision studies were performed according to CLSI EP05-A3 using native and contrived human serum samples. CMV IgG and Syph Assays were evaluated with one reagent lot on two Atellica CI analyzers. One aliquot of each sample was tested in duplicate in two runs per day ≥2 hours apart on each analyzer for ≥20 days. Method comparison studies were performed according to CLSI EP12-A2. Individual native human serum samples were analyzed using the Atellica IM CMV IgG and Syph Assays on the Atellica IM and Atellica CI Analyzers. The results were assessed based on Index values distinguishing reactive (Index ≥cut-off value) and nonreactive (Index <cut-off value) specimens. Results As shown in table below, repeatability and within-lab %CVs for the two assays presented were <3.7% and <7.0%. Negative and positive agreement were 100% for the 111 nonreactive CMV IgG samples and the 169 CMV IgG reactive samples tested. Negative and positive agreement were 100% for the 103 Syph reactive samples and the 126 nonreactive Syph samples tested. Overall clinical agreement between each of the presented assays on the Atellica CI Analyzer and Atellica IM Analyzer was 100%. Conclusions Evaluation of the Atellica IM CMV IgG and Syph Assays using the Atellica CI Analyzer demonstrated acceptable precision and equivalent performance compared to the same assays on the Atellica IM Analyzer.