The parasitic, infectious cell that infects a host is called a sporozoite. This sporozoite infects the host organism by entering the blood stream and eventually settling in a vital organ such as the heart, liver, lung, or spleen.
The parasitic, infectious cell that invades a host is known as a sporozoite. This sporozoite penetrates the bloodstream and eventually lodges in crucial organs such as the heart, liver, lung, or spleen.