Lifecycle of Eimeria compared to other Apicomplexans. The lifecycles of apicomplexan parasites are illustrated to highlight the differences in host and cell type specificity. Eimeria parasites have a single host lifecycle and show a strict tissue and cell type specificity. T. gondii can infect multiple hosts and different tissues and cell types. Sexual reproduction, however, is restricted to epithelial cells of cats. Plasmodium falciparum has an obligate two host lifecycle, proliferative stages are only found in humans, sexual reproduction takes place in mosquitoes.