Synonym for quotidian malaria ... Malaria in which the paroxysms occur daily; usually a double tertian malaria, in which there is an infection by two distinct groups of Plasmodium vivax parasites sporulating alternately every 48 hours, but also may be an infection by the pernicious form of malarial parasite, P. Falciparum, combined with P. Vivax, o... Found on http://www.encyclo.co.uk/local/20973