Pauls Valley, OK, Pauls Valley Democrat

Community News Network

March 27, 2013

Hyper-cleanliness may make us prone to getting sick

A growing body of evidence suggests that all the antibacterial-wiping, germ-killing cleanliness of the developed world may actually be making us more prone to getting sick — and that a little more dirt might help us stay healthier in the long run.

The idea, known as the hygiene hypothesis, was first proposed in 1989 by epidemiologist David P. Strachen, who analyzed data from 17,414 British children and found that those who had grown up with more siblings (and presumably more germs) were less likely to have allergies and eczema. Since then, the theory has been cited as a possible explanation for everything from multiple sclerosis to hay fever and autism. But its particulars aren't so clean and clear.

Here's what researchers do know: Our immune systems need bugs. They rely on early encounters with germs to learn how to protect our bodies.

"Bacteria, fungi, lots of these things we think of as bad — they're all part of our environment, and we evolved to live with them," says Michael Zasloff, an immunologist and physician at MedStar Georgetown University Hospital. Through exposure to these microbes early in life, your immune system learns what's harmful and what isn't, he says, and that readies the immune responses you'll have for the rest of your life.

"The body has got to know friend from foe," Zasloff says. If your body learns that a specific microbe or substance — any antigen, or visitor to the body — is a foe, it will send immune system cells to destroy it. If it recognizes the antigen as a friend, the immune system will leave it alone. "Exposure tells the immune system, 'These are the things you're going to run into all the time, so you don't need to worry about them.' "

Text Only
Community News Network
Business Marquee

e-Edition
  • How You Want It When You Want It Today's Pauls Valley Democrat

    Now you can view and download the Democrat right to your desktop on the day the paper is published. Click here to get more information on the Democrat's e-Edition.

     

    CLICK HERE TO ACCESS THE E-EDITION SITE

     

    ATTENTION CURRENT DEMOCRAT SUBSCRIBERS TO START an e-EDITION

    e-mail request to sjohnson@pvdemocrat.com

    April 20, 2011 1 Photo 1 Link

AP Video
Ariz. Inmate Dies 2 Hours After Execution Began Crash Kills Teen Pilot Seeking World Record LeBron James Sends Apology Treat to Neighbors Raw: Funeral for Man Who Died in NYPD Custody Migrants Back in Honduras After US Deports Israeli American Reservist Torn Over Return Raw: ISS Cargo Ship Launches in Kazakhstan Six Indicted in StubHub Hacking Scheme Former NTSB Official: FAA Ban 'prudent' EPA Gets Hip With Kardashian Tweet Bodies of MH17 Victims Arrive in the Netherlands Biden Decries Voting Restrictions in NAACP Talk Broncos Owner Steps Down Due to Alzheimer's US, UN Push Shuttle Diplomacy in Mideast Trump: DC Hotel Will Be Among World's Best Plane Crashes in Taiwan, Dozens Feared Dead Republicans Hold a Hearing on IRS Lost Emails Raw: Mourners Gather As MH17 Bodies Transported Robot Parking Valet Creates Stress-free Travel Raw: Fight Breaks Out in Ukraine Parliament
Stocks
Facebook