MIXED-SPECIES PLASMODIUM INFECTIONS OF HUMANS

We analyzed point-prevalence data from 35 recent studies of human popu lations in which Plasmodium falciparum and one other Plasmodium specie s were the reported causes of malaria infections. For the P. falciparu m-Plasmodium vivax pair, higher overall prevalence in a human populati on is associated with fewer mixed-species infections than expected on the basis of the product of individual species prevalences. This is no t true for P. falciparum-Plasmodium malariae.