In vitro propagation of Plasmodium falciparum for merozoite antigens.

A system with continuous flow of medium that uses disposable tissue culture flasks for the in vitro cultivation of P. falciparum is described. This scaled-up modification of the Trager and Jensen method gives merozoite yields sufficient for experimental vaccine studies in animals. A method of increasing the yield of merozoites by decreasing the pH of the medium is presented.