The new research, which was conducted as part of the Shuar Health and Life History Project (http://www.bonesandbehavior.org/shuar/), suggests that higher levels of exposure to infectious microbes early in life may change how we regulate inflammation as adults in ways that prevent chronic inflammation from emerging. Infectious microbes have been part of the human ecology for millennia, and it is only recently that more hygienic environments in affluent industrialized settings have substantially reduced the level and diversity of exposure.
A growing body of research has shown that higher levels of chronic inflammation are associated with diseases of aging like cardiovascular disease, diabetes and dementia. But current research is based almost exclusively on people living in affluent industrialized countries like the United States.
"We simply do not know what chronic inflammation looks like in places like the Ecuadorian Amazon and other parts of the world where infectious diseases are more common," McDade said.
As a result, McDade, director of the Lab for Human Biology Research and director of Cells to Society (C2S): The Center on Social Disparities and Health, and collaborators at the University of Oregon set out to investigate what factors in the environment and during development influence how people regulate inflammation as adults. The study was conducted in lowland Ecuador in a group of 52 adults between the ages of 18 and 49.
Based on current clinical criteria, McDade and colleagues did not find a single case of chronic low-grade inflammation among adults living in the Ecuadorian Amazon. McDade said people in these places are still dying of diseases such as cardiovascular disease, but probably not through processes that involve inflammation.
In terms of population health, McDade said these findings suggest that the associat
|Contact: Hilary Hurd Anyaso|