Pella Chronicle

CNHI/Southeast Iowa

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
CNHI/Southeast Iowa
  • Dangerous Darkies Logo.png Redskins not the only nickname to cause a stir

    Daniel Snyder has come under fire for refusing to change the mascot of his NFL team, the Washington Redskins. The Redskins, however, are far from being the only controversial mascot in sports history.  Here is a sampling of athletic teams from all areas of the sports world that were outside the norm.

    July 28, 2014 3 Photos

  • 'Rebel' mascot rising from the dead

    Students and alumni from a Richmond, Va.-area high school are seeking to revive the school's historic mascot, a Confederate soldier known as the "Rebel Man," spurring debate about the appropriateness of public school connections to the Civil War and its icons.

    July 28, 2014

  • Fast food comes to standstill in China

    The shortage of meat is the result of China's latest food scandal, in which a Shanghai supplier allegedly tackled the problem of expired meat by putting it in new packaging and shipping it to fast-food restaurants around the country

    July 28, 2014

  • wd saturday tobias .jpg Stranger’s generosity stuns Ohio veteran

    Vietnam War veteran David A. Tobias was overwhelmed recently when a fellow customer at an OfficeMax store near Ashtabula, Ohio paid for a computer he was purchasing.

    July 28, 2014 1 Photo

  • Screen Shot 2014-07-28 at 1.33.11 PM.png VIDEO: High-dive accident caught on tape

    A woman at a water park in Idaho leaped off a 22-foot high dive platform, then tried to pull herself back up with frightening results. Fortunately, she escaped with only a cut to her finger.

    July 28, 2014 1 Photo

  • CATS-DOGS281.jpg Where cats are more popular than dogs in the U.S.-and all over the world

    We all know there are only two types of people in the world: cat people and dog people. But data from market research firm Euromonitor suggest that these differences extend beyond individual preferences and to the realm of geopolitics: it turns out there are cat countries and dog countries, too.

    July 28, 2014 1 Photo

  • How spy agencies keep their 'toys' from law enforcement

    A little over a decade ago, federal prosecutors used keystroke logging software to steal the encryption password of an alleged New Jersey mobster, Nicodemo Scarfo Jr., so they could get evidence from his computer to be used at his trial.

    July 25, 2014

  • Russia's war on McDonald's takes aim at the Filet-o-Fish

    Russia said earlier this week that it had no intention of answering Western sanctions by making it harder for Western companies to conduct business in Russia.
    But all bets are off, apparently, when you threaten the Russian waistline.

    July 25, 2014

  • cleaning supplies Don't judge mothers with messy homes

    I was building shelves in my garage when a neighbor girl, one of my 4-year-old daughter's friends, approached me and said, "I just saw in your house. It's pretty dirty. Norah's mommy needs to clean more."

    July 25, 2014 1 Photo

  • Taking a look at Iowa's rural bridges and roads

    OSKALOOSA — National statistics indicate that Iowa roads and bridges are in desperate need of repair.According to the Rural Connections: Challenges and Opportunities in America’s Heartland report, 22 percent of Iowa’s rural bridges are deficient.Maha

    July 25, 2014

Features
Facebook
AP Video
Raw: 2 Shells Hit Fuel Tank at Gaza Power Plant Raw: Massive Explosions From Airstrikes in Gaza Giant Ketchup Bottle Water Tower Up for Sale Easier Nuclear Construction Promises Fall Short Kerry: Humanitarian Cease-fire Efforts Continue Raw: Corruption Trial Begins for Former Va Gov. The Carbon Trap: US Exports Global Warming UN Security Council Calls for Gaza Cease-fire Traditional African Dishes Teach Healthy Eating 13 Struck by Lightning on Calif. Beach Baseball Hall of Famers Inducted Israel, Hamas Trade Fire Despite Truce in Gaza Italy's Nibali Set to Win First Tour De France Raw: Shipwrecked Concordia Completes Last Voyage Raw: Sea Turtle Hatchlings Emerge From Nest Raw: Massive Dust Storm Covers Phoenix 12-hour Cease-fire in Gaza Fighting Begins Raw: Bolivian Dancers Attempt to Break Record Raw: Israel, Palestine Supporters Rally in US Raw: Air Algerie Flight 5017 Wreckage
Hyperlocal Search
Premier Guide
Find a business

Walking Fingers
Maps, Menus, Store hours, Coupons, and more...
Premier Guide
Obituaries