Prozone in malaria rapid diagnostics tests: how many cases are missed?

Background: Prozone means false-negative or false-low results in antigen-antibody reactions, due to an excess of either antigen or antibody. The present study prospectively assessed its frequency for malaria rapid diagnostic tests (RDTs) and Plasmodium falciparum samples in an endemic field setting.

Methods: From January to April 2010, blood samples with P.