Pesticide spraying at a farm on the North Shore of Massachusetts. (Photo: Alexandra Morris)
By Alexandra Morris
This weekend marks the start of the summer season, but I can’t help dwelling on the downside. Each year at this time, crowds from urban Boston descend on the farm next to my parents’ house on the North Shore in Mass. to pick their own strawberries – fresh, sweet, ripe…and coated with toxins.
While the farm staff warns visitors to wash the fruit before eating it, many choose to snack along the way (one group was caught sitting in the strawberry field with a can of “Reddi-Whip” in hand). After all, what’s the cost of a few unwashed strawberries?
Unfortunately, when it comes to our health, the cost may be fairly high.
Over the years, researchers have documented the bad effects of pesticide exposure on human health. Recently, though, and at a forum this week at Harvard, there’s been increased attention on the links between pesticides and neurodegenerative diseases, notably Parkinson’s and Alzheimer’s.
In a study published earlier this year in the journal Neurology, researchers from UCLA identified the way in which certain pesticides can increase the risk of Parkinson’s disease. They also found that people with a common genetic variant are even more sensitive to these pesticides – they are two to five times more likely to develop Parkinson’s if exposed.
“Once you identify the toxicity of these things, getting rid of the bad pesticides…would be a goal, not just for the people that live in the area, but for the workers that use it,” said the study’s lead author, Dr. Jeff Bronstein, a professor of neurology at UCLA.
In a separate report out of Rutgers University, published in JAMA Neurology, researchers found that exposure to the pesticide DDT may increase the risk of developing Alzheimer’s disease. In the study, researchers found that levels of DDE, the chemical compound that develops when DDT breaks down, were higher in the blood of Alzheimer’s patients compared to those without the disease.
And the effects go beyond the risk of Parkinson’s and Alzheimer’s. Marc Weisskopf, an associate professor of environmental and occupational epidemiology at the Harvard School of Public Health, who spoke at the Harvard forum, said there is evidence that pesticides contribute to a host of neurodevelopmental disorders as well, from ADHD and developmental disorders to lowered cognitive performance. Continue reading