The article does not mention widely distributed Toxoplasma gondii, that actually changes the behaviour of hosts in the interests of parasites. Think you like cats? Think again!
Also my behavior is influenced by a lot of things outside my control: Genes, hormones, antidepressants[1]... what do I care if a parasite adds to the mix?
[1] While I can control my intake, I can't control the side-effects.
The title led me to believe it might be something more like the gondii situation mention.
There is perhaps an association between gondii and schizophrenia. Here is one meta analysis[1]
"The results suggest that individuals with schizophrenia have an increased prevalence of antibodies to T. gondii. This association is consistent with other epidemiological studies as well as with animal studies."
[1] http://schizophreniabulletin.oxfordjournals.org/content/33/3...