Rapid Sporozoite ELISA Using 3,3',5,5'-Tetramethylbenzidine as the SubstrateChromogen

摘要

A modified version of the standard 2-site sporozoite enzyme-linked immunosorbentassay (ELISA) using 3,3'5,5'-tetramethylbenzidine (TMB) as the substrate chromogen solution was adapted for rapid detection and identification of Plasmodium falciparum and P. vivax circumsporozoite (CS) proteins. The TMB-ELISA was evaluated using sporozoites from experimentally infected mosquitoes and laboratory colonized uninfected mosquitoes. Our data indicate comparable sensitivity levels between the TMB-ELISA and the standard ELISA, i.e., 50 P. falciparum or P. vivax sporozoites/50 ul of test solution. Reactions inherent to the method were specific and background reactivity was minimal. The TMB-ELISA is rapid (1 hr), simple, uses a minimal amount of monoclonal antibodies, and is suitable for use in a wide range of laboratories. Keywords: Plasmodium falciparum, Circumsporozoite. (jes)