Extreme Chemical Sensitivity Makes Sufferers Allergic to Life

Its sufferers were once dismissed as hypochondriacs, but there's growing biological evidence to explain toxicant-induced loss of tolerance (TILT).

By Jill Neimark
Dec 11, 2013 12:00 AMMay 23, 2020 11:29 PM
Allergic to Everything - Keith Negley
(Credit: Keith Negley)

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One night in August 2005, Scott Killingsworth, a 35-year-old software designer in Atlanta, dragged his dining-room table out to the porch and lay down on it. The house he’d just rented — on 2 acres in an upscale suburb north of the city — was meant to be relatively free of man-made chemicals, his refuge from the world. For years he had been experiencing debilitating reactions to a cornucopia of common chemicals that others don’t even notice.

But this house, like the one before it, was making him sick with flulike symptoms — nausea, headaches and muscle stiffness.

Lying on the table and breathing in fresh air, Killingsworth thought back to the morning seven years ago when his office was sprayed with Dursban, a potent organophosphate pesticide that has been banned for indoor use since 2000. Within minutes of the pesticide treatment, he was unable to concentrate, and he felt like he had a bad flu. When he returned to the office a week later, he felt sick again. He asked his supervisor to move him to a different office. 

“I thought that was the end of it,” he recalls. “But that was the beginning of it.”

Instead of recovering, he got sicker as each year passed. Newly renovated buildings, fresh paint, gasoline odors, pesticides, herbicides — the list of substances he reacted to grew longer and longer. After his apartment was painted by mistake one day while he was at work, he got so ill that he took a leave of absence and moved. 

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