You may wish to consult parasite (disambiguation) for other, similarly-named pages.

A parasite was an organism that acquired sustenance from a host organism, usually at the host's expense. They were regulated by their metabolisms, so an ecosystem was not overrun by them. (PROSE: Parasite)

Parasites could operate on any level, either biological or even universal. The Red leech fed off of a single host, (TV: The Crimson Horror) while entire races like the Nimons and the Stingrays used up whole civilisations, with the latter consuming the entire surface of a planet and reducing it to dust, (TV: The Horns of Nimon, Planet of the Dead) and the Elysium parasites laid eggs the size of planets into gas giants so their young could consume the world. (PROSE: Parasite)

Metaphorical parasites Edit

The term "parasite" was sometimes used to describe persons who exploited others, such as when Mehendri Solon called the Time Lords "spineless parasites". (TV: The Brain of Morbius)

Other beings that were called parasites included the Animus by Vicki Pallister, (TV: The Web Planet) the Eternals by the Fifth Doctor, (TV: Enlightenment) and the Great Intelligence by the Eleventh Doctor (TV: The Snowmen) and Lethbridge-Stewart. (HOMEVID: Downtime)

Martha Jones compared Ernest Tiermann and his family to parasites living inside the body of a living thing, i.e. Dreamhome. (PROSE: Sick Building)

Community content is available under CC-BY-SA unless otherwise noted.

Fandom may earn an affiliate commission on sales made from links on this page.

Stream the best stories.

Fandom may earn an affiliate commission on sales made from links on this page.

Get Disney+