Sporozoites are the motile, infective stage in the life cycle of certain parasitic protozoa, specifically those within the phylum Apicomplexa. These organisms include notorious pathogens such as Plasmodium, the causative agent of malaria, and Cryptosporidium, which causes cryptosporidiosis. Sporozoites are typically introduced into the host organism by a vector, such as a mosquito in the case of Plasmodium.
