Fig. 3From: The establishment of a WHO Reference Reagent for anti-malaria (Plasmodium falciparum) human serumReference reagent 10/198 detects recombinant PpCSP in ELISA. Serum dilution (Log) vs absorbance (AU) was measured for 10/198 and three unknown samples by ELISA with PpCSP as the coating antigen. Each ampoule of 10/198 contains 100 Units as assigned unitage. Parallel line analysis of the data presented in a was used to derive the unitage assigned in test samples (b)Back to article page