A blogpost by Peter Harrison
The claim that parasitic organisms are influencing our culture may initially seem quite far-fetched, and the idea stems from the somewhat worrying claim that brain-parasites are able to control our behaviour. Could any of your actions really be influenced by a microscopic organism living in your brain? Could there be more to this than science fiction? Believe it or not, science says (probably) yes.
The parasite that we are focusing on is Toxoplasma gondii, a protozoan species that has intrigued biologists and psychologists all over the world. Everything we know about this parasite is interesting, so deciding where to begin is a challenge. The best place to start is probably by explaining how wildly successful T.gondii really is. Specialised parasites are often very exciting to study as they have evolved incredible abilities, but many parasites become so specialised that they are only effective in a specific host species, or sometimes even a specific organ within a specific host. But T.gondii is able to use many warm-blooded animals as hosts. Another truly amazing thing worth mentioning is that