Parasites in fiction

Parasites living in or off humans are a favorite theme in the science fiction and horror genres, particularly in the subgenre of body horror. The fear of the human mind and body being used in such a way by another being is an understandably disturbing idea. In of works with this theme would be several of the films of David Cronenberg (particularly Shivers), the Alien series of films, the Yeerks of the Animorphs book series, the pods from Invasion of the Body Snatchers, and the Goa'uld of the television series Stargate. For a list of fictional parasites, see List of parasitic organisms. Even video games have exercised the use of such a fear, the Halo video game series being a prime example being The Flood, along with Metroid Fusion and Resident Evil 4.