To determine whether poisoning with the organophosphate insecticide methamidophos results in a syndrome of persistent subclinical sensory and motor neuropathy, a clinical and epidemiologic study will be undertaken among a population of 50 seriously poisoned agricultural workers. Two comparison groups will also be examined -- one in which a history of methamidophos exposure is common, but with no history of poisoning, and the other with no history of exposure.
Specific aims are: 1.To determine whether inhibition of lymphocyte neuropathy target esterase (NTE) measured in peripheral lymphocytes is a sensitive and specific index of peripheral neurotoxicity. 2.To determine whether previous poisoning with methamidophos results in diminished motor and sensory function, as reflected in electrophysiologic studies, pinch strength, and elevated vibrotactile threshold. 3.To determine whether a dose-response relationship exists between lymphocyte NTE inhibition and motor or sensory function. 4.To determine whether there exist threshold levels of methamidophos exposure below which either sensory or motor neuropathy is no longer evident. The public health significance of this study is that methamidophos and other organophosphate neurotoxins are widely used by workers in the United States and throughout the world.

Agency
National Institute of Health (NIH)
Institute
National Institute for Occupational Safety and Health (NIOSH)
Type
Research Scientist Development Award - Research & Training (K01)
Project #
1K01OH000123-01
Application #
3069047
Study Section
Safety and Occupational Health Study Section (SOH)
Project Start
1992-07-01
Project End
1995-06-30
Budget Start
1992-07-01
Budget End
1993-06-30
Support Year
1
Fiscal Year
1992
Total Cost
Indirect Cost
Name
Mount Sinai School of Medicine
Department
Type
Schools of Medicine
DUNS #
City
New York
State
NY
Country
United States
Zip Code
10029