Hacker News new | past | comments | ask | show | jobs | submit login




Note that if you actually read the wikipedia article you linked, more recent studies found that the effects of previous studies are not supported by evidence, and found this with an extremely high P-value.

You're also more likely to get the parasite from handling raw pork than cats, and indoor cats are entirely unaffected.


This parasite makes mice (not humans!) a slightly less averse to light and feline scent, noting more. I don't think we can attribute love for cats to toxoplasma, it is too far-fetched.


I agree. But it’s more than being slightly averse..it makes the mice suicidal. The first time I heard about suicidal rodents and how cats hunt them with their Trojan parasitic poo was on the discover channel..they had set to a night vision camera and recorded the whole thing. I don’t even know if the channel or magazine exists anymore..

I have also seen this in snakes that ‘mesmerize’ mice ..predators know how to paralyze their prey.

But this turned up as more recent and is closer to the Trojan suicide prodding parasite.. https://api.nationalgeographic.com/distribution/public/amp/s...

I have read the full piece but now it’s not accessible without subscription..

[..] A mouse sniffs the air, catches the whiff of cat urine, and runs towards the source of the smell… and straight into the jaws of a cat. This bizarre suicidal streak is the work of a single-celled parasite called Toxoplasma gondii, which has commandeered the mouse’s brain and turned it into a Trojan rodent—a vehicle for sneaking T.gondii into a cat.[..]

[..] T.gondii (or Toxo for short) infects a wide variety of mammals, but it only completes its life cycle in the guts of a cat. To get there, Toxo has ways of subverting the behaviour of dead-end hosts like mice. Its machinations are subtle, so subtle that it’s normally hard to tell an infected mouse from an uninfected one. But the difference becomes obvious when there’s cat pee in the air. Normal mice, even lab-born ones that have never met a cat, have an innate fear of cat smells. Those infected with Toxo do not. They (and their parasites) are more likely to end up in a cat. Toxo also influences the brain of Wendy Ingram from the University of California at Berkeley. She has long been obsessed with the brain and fascinated by Toxo’s dominion over it. “I was struck by the idea that a single celled parasite ‘knows’ more about our brains than we do,” she says. [..]




Consider applying for YC's Spring batch! Applications are open till Feb 11.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: