Friday, March 25, 2016

Explosive road rage-like anger linked to Toxoplasma gondii

There are many ways your cat might be filling you with rage. Scratching your furniture, sitting on your computer keyboard – or giving you parasites that may cause explosive anger.
Infection with Toxoplasma gondii, a protozoan parasite carried by cats, has been linked to a human psychiatric condition called intermittent explosive disorder. People who have IED typically experience disproportionate outbursts of aggression, like road rage.

T. gondii is already known to change the behaviour of the organisms it infects. By making rodents bolder and more adventurous, the parasite makes them more likely to be caught and eaten by a cat, allowing the parasite to complete its life cycle.

It can also infect humans, through contact with cat faeces, poorly cooked meat or contaminated water, and as many as one-third of the world’s population may be infected. The protozoan doesn’t make us feel sick, but forms cysts in the brain where it can remain for the rest of a person’s life. Such infections have been linked to psychiatric conditions including schizophrenia, bipolar disorder and suicidal behaviour. People infected with T. gondii also have slower reaction times and are more likely to be involved in car accidents.

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