Weed Killers, Bug Killers, Pesticides, And Solvents — Exposure Increases Risk Of Developing Parkinson's Disease, Meta-Analysis Finds

Exposure to pesticides, weed killers, bug killers, and solvents, is associated with a significantly higher likelihood of developing Parkinson’s disease, according to a new meta-analysis on the subject. The meta-analysis incorporated over 100 different studies from all over the world.

Image Credit: Neural Connections of the Brain via Flickr CC
Image Credit: Neural Connections of the Brain via Flickr CC

“Due to this association, there was also a link between farming or country living and developing Parkinson’s in some of the studies,” said study author Emanuele Cereda, MD, PhD, with the IRCCS University Hospital San Matteo Foundation in Pavia, Italy. The new research was also conducted by Gianni Pezzoli, MD, with the Parkinson Institute — ICP, Milan.

The meta-analysis compared 104 different studies on the subject — looking at relationship between exposure to weed, fungus, rodent or bug killers, and solvents, and the likelihood of developing Parkinson’s disease. The researchers also included studies which evaluated the “proximity of exposure, such as country living, work occupation and well water drinking.”

What the meta-analysis found is that “exposure to bug or weed killers and solvents increased the risk of developing Parkinson’s disease by 33-80%. In controlled studies, exposure to the weed killer paraquat or the fungicides maneb and mancozeb was associated with two times the risk of developing the disease.”

“We didn’t study whether the type of exposure, such as whether the compound was inhaled or absorbed through the skin and the method of application, such as spraying or mixing, affected Parkinson’s risk,” said Cereda. “However, our study suggests that the risk increases in a dose response manner as the length of exposure to these chemicals increases.”

Here at Planetsave we’ve reported on the close association between Parkinson’s disease (along with dementia and other neurological disorders) and pesticides quite a bit.

For further reading, I recommend: Parkinson’s Disease Strongly Linked To Pesticide Exposure, New Research Continues To Show, Dementia Affecting More And More People, Earlier And Earlier In Life, Research Finds, and Damage from Chemical Exposure Passed Down for Generations.

The new research was published May 28, 2013, in the journal Neurology®, which is the medical journal of the American Academy of Neurology.

About the Author

‘s background is predominantly in geopolitics and history, but he has an obsessive interest in pretty much everything. After an early life spent in the Imperial Free City of Dortmund, James followed the river Ruhr to Cofbuokheim, where he attended the University of Astnide. And where he also briefly considered entering the coal mining business. He currently writes for a living, on a broad variety of subjects, ranging from science, to politics, to military history, to renewable energy. You can follow his work on Google+.