Send us feedback. Copyright 1999 American Society for Microbiology. All rights reserved. It also makes them act hyperactive, which makes it more likely that they'll attract a passing cat's attention. T. gondii is a parasitic protozoan.
Parasites are basically creatures that mooch off others.
Parasite protozoa are microscopic moochers. They often have very complex lives, moving among many hosts and environments. In the case of T. gondii , the cat is its ultimate host. That is, the only place the parasite can reproduce sexually is in cats' guts. T. gondii does not seem to cause any illness or harm to cats.