Parasites and Fungi Hijack Host Behavior for Reproduction, Creating Real-Life Zombies
Updated
Updated · The Washington Post · Oct 29
Parasites and Fungi Hijack Host Behavior for Reproduction, Creating Real-Life Zombies
3 articles · Updated · The Washington Post · Oct 29
Summary
Parasites and fungi can redirect living hosts’ movement, motivation and decision-making to boost their own reproduction and spread, rather than reviving the dead.
Ophiocordyceps, the best-known “zombie ant” fungus, drives infected ants to leave the colony, climb vegetation and lock into a fatal death grip before releasing spores onto ants below.
Studies suggest that manipulation does not come from direct brain takeover: fungal growth clusters around muscles and other tissues, while key nerve-muscle connections can remain intact.
Other parasites use different routes to the same end—emerald jewel wasps suppress cockroaches’ drive to move, hairworms lure insects into water, and Toxoplasma can weaken rodents’ fear of cats.
Researchers say there is no single “zombie switch”; these cases show how behavior emerges from interactions among the nervous system, muscles and other tissues.