Fig. 1
From: Comparison of two malaria multiplex immunoassays that enable quantification of malaria antigens
Dilutional linearity of antigens from the WHO international P. falciparum and P. vivax antigens. The WHO international P. falciparum and P. vivax antigen standards in the range of 1.6 to 400 IU/mL were evaluated by one operator in three independent experiments over a week and plotted as mean of analyte concentration ± standard deviation (SD) for (A) whole blood and (B) DBS. The y-axis of each plot represents the concentrations of target antigen calculated using the calibrators of the respective assay. Dilutional linearity was determined from regression analysis of observed mass concentrations versus the expected concentrations in international unit. Red symbol—Antigens estimated by using the WHO international standard P. falciparum antigen. Blue symbol—Antigens estimated by using the WHO international standard P. vivax antigen. The best-fit trend line for each individual antigen is shown in its color code