Travelers Health and Autism Research

Travelers Health PollutionAutism has been linked with early exposure to traffic pollution.

In a finding that points to a link between environmental toxins travelers health and Autism Research, a new study shows that children who were exposed to the highest levels of traffic related air pollution during gestation and in early infancy were three times more likely to be diagnosed with Autism.

The study, published in the Archives of General Psychiatry, found that early exposure to high levels of air pollution in general was linked to an increased likelihood of autism in a group of more than 500 children followed for several years from birth to the toddler years. The researchers gathered regional air quality data and used detailed calculations to estimate the air quality around the residence in which a child’s mother spent her pregnancy and the resulting child spent his or her first year.


Their findings suggest that the link between air pollution travelers health and Autism Research is evident largely at the highest levels of exposure and slightly higher when the exposure comes later in a woman’s pregnancy. The strongest link was found between exposures to nitrogen dioxide, a pollutant found plentifully around freeways and rural areas, where exposure to particulates was less, are strongly linked to autism.


The researchers found that the link between traffic,travelers health and related air pollutants held steady after they took into account parental education, ethnicity, whether a mother smoked during pregnancy, or how densely populated the region was. The report suggests that the finding is not just a backhanded way of capturing some link between autism and the socioeconomic or demographic factors in which a child is raised. The study refines earlier findings by the same authors that linked autism to a child’s living near a freeway.

While the authors caution that this link is not proof that air pollution causes Autism, they do suggest there are several ways in which air pollutants could influence the development or function of a child’s brain in ways that could result in the sorts of neurodevelopmental problems seen in autism. Diesel exhaust particles and polycyclic hydrocarbons, which are present in traffic pollutants, have been shown to interfere with gene expression important in healthy brain development. Other research suggests travelers health that traffic related air pollutants induce inflammatory reactions and oxidative stress in the brain and throughout the body.


The article was one of three studies published in the Archives of General Psychiatry probing Autism’s possible origins and its effects on the brain. Those come at a time when the diagnosis of Autism spectrum disorder in U.S. children has skyrocketed. In the last six years alone, it has increased 78 percent. Collectively, the studies point to an urgent need for more Autism Research on prenatal and early postnatal brain development in Autism, with a focus on how genes and early development combine to increase the risk.

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