Dirty Kids Are Healthy Kids

April 5, 2012

Natural News

By J.D Heyes

“Let your kids play in the dirt. It’s good for them. In fact, you should join them. It’s fun getting dirty.” –KTRN

Here’s a concept that most parents will find a little hard to believe: new research shows that it’s possible kids can be too clean.

You read that right.

That’s because all of the soap dispensers, hand sanitizers and alcohol-tinged wipes could be robbing our kids from exposure to the germs that help strengthen their immune systems.

According to new research done on mice, increasing exposure to germs helps develop the immune system, thereby preventing allergies and other immune-related diseases like colitis and asthma later in life.

Researchers at the Brigham and Women’s Hospital (BWH) in Boston led the study and published their results in the March issue of Science magazine. Using the “hygiene hypothesis,” the team says research shows a lack of exposure to microbes at an early childhood age increases susceptibility to some diseases because the lack of exposure suppresses the body’s immune system. The study does more than just support the notion, it also may explain the whys and hows of the process.

Researchers warned, however, that their research was conducted on mice, not humans. Still, the results seemed to indicate that you have to trigger the immune system with the introduction of germs in order for it to develop fully.

How it works

The research team, led by co-authors Dr. Richard Blumberg, chief for the BWH Division of Gastroenterology, Hepatology and Endoscopy, and Dr. Dennis Kasper, director of BWH Channing Laboratory, studied “germ-free” mice bred in a sterile environment without exposure to microbes, as well as specific-pathogen-free mice that were raised in a normal laboratory environment.

The mice were bred to develop forms of asthma and inflammatory bowel disease, in which their immune systems were then compared.

The team found that the germ-free mice had more invariant natural killer T cells in their lungs and bowel, and developed more severe disease symptoms.

“[... W]e show that, in germ-free (GF) mice, invariant natural killer T (iNKT) cells accumulate in the colonic lamina propria and lung, resulting in increased morbidity in models of IBD and allergic asthma compared to specific pathogen-free (SPF) mice,” Blumberg and Kasper wrote.

The researchers also found that when they exposed germ-free mice to mice with germs in their first few weeks of life, they didn’t develop high levels of invariant natural killer T cells. Also, they didn’t develop the more severe symptoms seen in those mice kept germ-free. And, they discovered, germ-free mice with early-life exposure to microbes developed long-term disease protection.

“These studies show the critical importance of proper immune conditioning by microbes during the earliest periods of life,” Blumberg told reporters. “Also now knowing a potential mechanism will allow scientists to potentially identify the microbial factors important in determining protection from allergic and autoimmune diseases later in life.”

Click here for the report.