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Busy Roads Ups Asthma Risk Among Teens

by Sheela Philomena on January 21, 2011 at 12:09 PM
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 Busy Roads Ups Asthma Risk Among Teens

In a new study that was carried out in shantytowns near Lima, Peru have shown that teenagers who live next to busy roads are at a greater risk of developing allergies and asthma.

The findings show that the risk of developing allergies to dust mites, pet hair and moulds can go up by 30 percent, while the risk of asthma symptoms, such as wheezing, can double.

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The study is thought to be the first to link heightened rates of allergic disease and exposure to traffic-related pollution as a possible reason for increased rates of asthma along major transit routes.

According to experts at Johns Hopkins, no study has until now looked at how busy roadways affect the allergic origins of asthma.

The study involved 725 teenagers, aged 13 to 15, who were living in Pampas de San Juan de Miraflores, Peru.
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It found that the risk of having an allergic disease (atopy) and asthma was worst for those living immediately next to a busy road, where a steady stream of traffic across multiple lanes flowed unimpeded all day long.

Atopy rates went up by 7 percent for every city block (approximately 300 feet) closer they lived to the road. For those who lived next to the road, the odds of having asthma were twice that of those who lived a quarter-mile (about four city blocks) away.

"Our study clearly shows why we need to protect respiratory health and plan future major roadways here or abroad away from residential areas and schools," said senior study investigator William Checkley.

"Family physicians and public health workers now know they need to more closely monitor children who live near major roadways for allergies and for the earliest signs of asthma," he said

The researchers are now planning to carry out further studies on the underlying genetic profile of those at greater risk of atopy and asthma.

"Our ultimate goal is to identify other key environmental stimuli or traffic-related pollutants that help trigger allergic disease, and then use our knowledge of how they work biologically to stop them before asthma sets in," said Checkley.

The study is published online in the Journal of Allergy and Clinical Immunology.

Source: ANI
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