Invasion of a T. gondii tachyzoite into a human foreskin fibroblast.
Note the constriction in the parasite’s plasma membrane that moves from anterior to
posterior as the parasite penetrates past the host plasma membrane and into the developing
parasitophorous vacuole. Real time; filmed at 35oC using a Dage VE1000SIT camera mounted
on a Nikon Eclipse E400 microscope (Nomarski optics). The parasite is ~7um long.