Human Culture Shaped by Cat Parasite?, page 1
Pages: <<  1    2    3  >>
ATS Members have flagged this thread 0 times
Topic started on 5-8-2006 @ 11:39 PM by Icarus Rising
I saw a blurb somewhere on this the other day, and it kept nagging at the corner of my mind until I went and tracked down the story today. I'm curious if there is anything concrete to it, or if it is out in the realm of science fiction.


Mind Control by Parasites

Half of the world's human population is infected with Toxoplasma, parasites in the body—and the brain. Remember that.

Toxoplasma gondii is a common parasite found in the guts of cats; it sheds eggs that are picked up by rats and other animals that are eaten by cats. Toxoplasma forms cysts in the bodies of the intermediate rat hosts, including in the brain.

Dr. E. Fuller Torrey (Associate Director for Laboratory Research at the Stanley Medical Research Institute) noticed links between Toxoplasma and schizophrenia in human beings, approximately three billion of whom are infected with T. gondii:

Toxoplasma infection is associated with damage to astrocytes, glial cells which surround and support neurons. Schizophrenia is also associated with damage to astrocytes.
Pregnant women with high levels of antibodies to Toxoplasma are more likely to give birth to children who will develop schizophrenia.
Human cells raised in petri dishes, and infected with Toxoplasma, will respond to drugs like haloperidol; the growth of the parasite stops. Haloperidol is an antipsychotic, used to treat schizophrenia.

link


Half the world's population infected with a parasite that causes schizophrenia? That would explain alot, especially these days. There is another article on the same website that takes things even further, postulating that human history may have been shaped by interactions between such parasites and their human hosts.


A parasitic microbe commonly found in cats might have helped shape entire human cultures by manipulating the personalities of infected individuals, according to a new study.

Infection by a Toxoplasma gondii could make some individuals more prone to some forms of neuroticism and could lead to differences among cultures if enough people are infected, says Kevin Lafferty, a U.S. Geological Survey scientist at the University of California, Santa Barbara.

In a survey of different countries, Lafferty found that people living in those with higher rates of T. gondii infection scored higher on average for neuroticism, defined as an emotional or mental disorder characterized by high levels of anxiety, insecurity or depression.

His finding is detailed in the Aug. 2 issue of the journal for Proceedings of the Royal Society, Biology.

Other studies have also found links between the parasite and schizophrenia. T. gondii infection is known to damage astrocytes, support cells in the brain that are also affected during schizophrenia. Pregnant women with high levels of antibodies to the parasite are also more likely to give birth to children who will develop the disorder.

In light of such studies, Lafferty wondered whether high rates of T. gondii infection in a culture could shift the average personality of its individuals.

link


I've often wondered if the alien invasion was internal, with the human race, rather than the earth, as host. Schistosomes and other weird worms with multiple life stages give me the creeps. Is this thing some kind of biological implant, a nanotech device from the ancient past? Worms and spiders and snails, inside!

Get me some Praziquantil, quick! For me and my cat.


reply posted on 6-8-2006 @ 07:43 PM by Icarus Rising

Dr Joanne Webster from Imperial College London, and lead researcher said: "Although we are certainly not saying that exposure to this parasite does definitely lead to the development of schizophrenia, this and previous studies do show there may be a link in a few individuals, providing new clues for how we treat toxoplasmosis and schizophrenia."

Previous epidemiological and neuropathological studies have indicated some cases of schizophrenia may be associated with environmental factors, such as exposure to the parasite T. gondii. At the same time several of the medications used to treat schizophrenia have been shown to posess anti-parasitic and in particular anti-T.gondii properties. This led the authors to suspect that the anti-psychotic activity of these medications may be due to their inhibition of these parasites.

link


In truth, it is blind allegiance to preformed opinions that is more of an impediment to the advancement of knowledge than any half-baked theory I could come up with on my own.


To test his hypothesis, Lafferty looked at published data on cultural dimensions and average personalities for different countries. The countries examined also kept records of the prevalence of T. gondii antibodies in women of childbearing age. Countries with high prevalence of T. gondii infection also had higher average neuroticism scores.

"There could be a lot more to this story," Lafferty said. "Different responses to the parasite by men and women could lead to many additional cultural effects that are, as yet, difficult to analyze."


Remember, I am saying maybe, you are saying definitively not.


reply posted on 6-8-2006 @ 09:12 PM by bsl4doc
Originally posted by GradyPhilpott
Actually, the connection between cats and schizophrenia has been floating around for at least twenty years. I'm not sure, but I think Fuller Torrey first postulated this theory.

Schizovirus

Cats and Schizophrenia


Yes, the CONNECTION has, but Icarus' idea that areas with high "domestic cat" rations, has not, unfortunately.

The truth of the matter is, less than 1% of the population has schizophrenia, and more than 1% owns cats. It's much more likely that feral cats are carriers, I would imagine, anyways.

Mariella


reply posted on 6-8-2006 @ 10:00 PM by Icarus Rising

T. gondii infects both wild and domestic cats, but it is carried by many warm-blooded mammals.


I'm not sure how much human contact feral cats have, being feral and all, but cats that are adopted (or in my case, just took up residence) from who knows where, may be a factor.


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.


This isn't my idea, it is my speculation based on the two articles I am attempting to discuss here.


"There could be a lot more to this story," Lafferty said. "Different responses to the parasite by men and women could lead to many additional cultural effects that are, as yet, difficult to analyze."

Lafferty thinks that climate could be an important factor in determining which human populations are infected by T. gondii. The parasite's eggs can survive longer in humid, low-altitude regions, especially at mid latitudes that have infrequent freezing and thawing.

Other factors could also influence infection rates, including how a culture's attitudes about having cats as pets and the hygiene practices of its people.


Peace to you, Mariella, and my apologies for any affront to you from my comment about doctors hiding root causes of schizophrenia.
Pages: <<  1    2    3  >>    ^^TOP^^



First Heartless Man - You Don\'t Really Need A Heart or A Pulse
  Posted 8 days ago with 51 member flags
Doctor Uses Coconut Oil to Reverse Husband\'s Alzheimer\'s Disease
  Posted 13 days ago with 28 member flags
A brief look at water fluoridation and the insanity of it
  Posted 10 days ago with 28 member flags
Brains of Addicts Are Inherently Abnormal
  Posted 7 days ago with 20 member flags
FDA say body is a drug and has the right to regulate it!
  Posted 10 days ago with 18 member flags
MPD/DID and Quantum Psychiatry
  Posted 14 days ago with 12 member flags