Plasmodium vivax (P. vivax)

Plasmodium vivax is a unicellular eukaryotic protozoan belonging to the phylum Apicomplexa and class Sporozoa. It is one of five Plasmodium species known to cause malaria in humans and is responsible for recurring ("relapsing") forms due to its ability to form dormant liver-stage hypnozoites that can reactivate weeks or months after initial infection. The life cycle alternates between female Anopheles mosquitoes—where sexual reproduction occurs—and humans—where it infects hepatocytes and erythrocytes through complex developmental stages including sporozoite, trophozoite, schizont, merozoite, gametocyte forms.[3][5] Unlike typical drug targets such as receptors or enzymes, Plasmodium vivax represents an entire pathogenic organism targeted by antimalarial therapies at various points during its lifecycle rather than through interaction with one specific biomolecule.

Other names

P. vivaxMalaria parasite (vivax type)Human malaria parasite (vivax)

For drugs targeting P. vivax infection: Inhibition of heme detoxification pathway by chloroquine in blood stages. Generation of reactive oxygen species by primaquine affecting both host and parasite hypnozoites; mechanism may involve host metabolism via CYP2D6 enzyme for activation. (No single defined molecular mechanism due to lack of unique druggable targets identified for this whole organism.)