Amish Children Less Susceptible To Allergies

The Daily Mail, via nc links:

The researchers surveyed 157 Amish families, about 3,000 Swiss farming families, and close to 11,000 Swiss families who did not live on a farm -- all with children between the ages of six and 12.

They found that just five percent of Amish kids had been diagnosed with asthma, compared to 6.8 percent of Swiss farm kids and 11.2 percent of the other Swiss children.

Similarly, among 138 Amish kids given a skin-prick test to determine whether they were predisposed to having allergies, only 10 kids -- or seven percent -- had a positive response.

In comparison, 25 percent of the farm-raised Swiss kids and 44 percent of the other Swiss children had a positive test, the researchers report in the Journal of Allergy and Clinical Immunology.

The study did not determine why the kids who grew up on farms were less likely to develop asthma and allergies, but other research has pointed to exposure to microbes and contact with cows, in particular, to partially explain the farm effect.

Drinking raw cow's milk also seems to be involved, Holbreich said.

The going theory is this early exposure to the diverse potential allergens and pathogens on a farm trains the immune system to recognize them, but not overreact to the harmless ones.

 Maybe it is exposure to microbes, or maybe it is inbreeding.  Anyway, I believe I've been exposed to all kinds of microbes with no ill effects.  Others disagree with the assessment of the ill effects.