Malaria is caused by a protozoan called Plasmodium falciparum. IgE is utilized during immune defense against certain protozoan parasites such as "Plasmodium falciparum". It seems still efficacious as an IV antimalarial against Plasmodium Falciparum. Co-infection with hookworm and "Plasmodium falciparum" is common in Africa. Other apicomplexan pathogens include the malaria parasite "Plasmodium" and the toxoplasmosis parasite "Toxoplasma". The parasite that causes malaria belongs to the genus "Plasmodium". Other apicomplexan pathogens include the malaria parasite "Plasmodium", and "Toxoplasma", the causative agent of toxoplasmosis. Some parasites like "Toxoplasma gondii" and "Plasmodium" spp. Malaria is a mosquito-borne infectious disease caused by the parasites of the genus "Plasmodium". Five species of plasmodium cause malaria in animals. The apicomplexans include "Plasmodium", the malaria parasite. Malaria parasites belong to the genus "Plasmodium" (phylum Apicomplexa). One of the best known diseases caused by protists in the genus "Plasmodium" is malaria. Malaria is caused by single-celled microorganisms of the "Plasmodium" group. In some hosts, invasion of erythrocytes by "Plasmodium" species can result in disease, called malaria.