Toxic mind control-Read all about it here

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Half of the world's human population is infected with Toxoplasma, parasites in the body—and the brain...Oxford scientists discovered that the minds of infected rats have been subtly altered...If the parasite can alter rat behavior, does it have any effect on humans?...Are parasites like Toxoplasma subtly altering human behavior?...
Still not sure that parasites can manipulate the behavior of host organisms? Consider these other cases:
* The lancet fluke Dicrocoelium dendriticum forces its ant host to attach to the tips of grass blades, the easier to be eaten. The fluke needs to get into the gut of a grazing animal to complete its life cycle.
* The fluke Euhaplorchis californiensis causes fish to shimmy and jump so wading birds will grab them and eat them, for the same reason.
* Hairworms, which live inside grasshoppers, sabotage the grasshopper's central nervous system, forcing them to jump into pools of water, drowning themselves. Hairworms then swim away from their hapless hosts to continue their life cycle.


The question is not, Can they reason? nor, Can they talk? but, Can they suffer?
~Jeremy Bentham