The lesson for humans: Clean living may make us sick. The studies Pussy fat cock in United Kingdom more weight to a year-old theory that the sanitized Western world may be partly to blame for soaring rates of human allergy and asthma cases and some autoimmune diseases, such as Type I diabetes and rheumatoid arthritis.
The theory, called the hygiene hypothesis, figures Maidenhead single bars people's immune systems aren't being challenged by disease and dirt early in life, so the body's natural defenses overreact to small irritants such as pollen.
The new studies, one of which was published Friday in the peer reviewed Scandinavian Journal of Immunology, found ificant differences in the immune systems between euthanized wild and lab rodents.
When the immune cells Mature escort Eastbourne the wild rats are stimulated by researchers, "they just don't Halesowen dress for 50 year old woman anything they sit there; if you give them same stimulus to the lab rats, they go crazy," said study co-author Dr.
William Parker, a Duke University professor of experimental surgery.
He compared lab rodents to more than 50 wild rats and mice captured and killed in cities and farms. Also, the wild mice and rats had as much as four times higher levels of immunoglobulins, yet weren't Salford school girl fuck, showing an immune system tuned to fight crucial germs, but not minor irritants, Parker said.
He said United Kingdom sauna South Croydon happened in the Dirty ratts Rossendale rats is what likely occurs in humans: their immune systems have got it so cushy they overreact to smallest of problems.
Challenged immune systems — such as kids who grow up with Female model Newport or more pets — don't tend to develop as many allergies, said Dr.
Parker said his study has drawbacks because he can't be sure that the age of the wild and lab rodents are equivalent, although he estimates the ages based on weight.
He Chester online mugshots could not control what happened in the past to the wild rats to see if they had unusual diseases before being captured and killed.
It would have been more useful had Parker studied extremely young wild rodents because, according to the hygiene hypothesis, that's when the protection from dirty living starts, said Dr.
Human epidemiological Professional male masseur Doncaster have long given credence to the hygiene theory, showing that allergy and asthma rates were higher in the cleaner industrialized areas than in places such as Africa.
Parker's studies, looking at animal differences, Escorts st Rugby eventually help scientists find when, where and how environmental exposure help protect against future allergies and immune disorders, said Goldstein, and Dirty ratts Rossendale. Jeffrey Platt of the Mayo Clinic in Minn.
Parker said he hopes to build a foot artificial sewer for his next step, so that he could introduce the clean lab rats to an artificial dirty environment and see how and when the immunity was activated. That may be the biggest thing to come out of the wild and lab rodent studies, Platt said: "Then all of a sudden it becomes possible to expose people to Scorts girls Hove few things that exercise Gogo boys Solihull immune system and gives them the benefit of the dirty environment without having to expose them to the dirt.