One cause of chronic fatigue syndrome could be exposure to
organophosphate pesticides and insecticides. The condition is identical
to neuro-behavioural abnormalities noticed since the early 1960s in
farmworkers who had been working with sheep dips and insecticides.
These abnormalities, which have never been given a collective name,
are identical in onset, symptoms and results of neuroendocrine studies
to those suffered by patients with CFS.
To test the theory, Peter Behan of the Institute of Neurological
Sciences in Glasgow studied 10 patients suffering from
neuro-behavioural symptoms for over a year and who had exposure to
organophosphates through a sheep dip from between two and five years.
Their symptoms included an acute influenza-like condition followed by
incapacitating fatigue. In all cases, there was a long delay between
exposure to the pesticides and the onset of the condition.
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