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Olfactory Function in Latino Farmworkers Over 2 Years: Longitudinal Exploration of Subclinical Neurological Effects of Pesticide Exposure.

Quandt, Sara A. PhD; Walker, Francis O. MD; Talton, Jennifer W. MS; Chen, Haiying MD, PhD; Arcury, Thomas A. PhD
Journal of Occupational & Environmental Medicine: Post Author Corrections: August 3, 2017
doi: 10.1097/JOM.0000000000001123
Original Article: PDF Only

Objective: We compared patterns of olfactory function over 2 years in pesticide-exposed male Latino farmworkers and male Latino workers in industries without pesticide exposure.

Methods: At five points over 2 years, workers completed tests of odor threshold (16 concentrations of n-butanol) using a well-established methodology. Tests at two or more time points were completed by 156 farmworkers and 118 non-farmworkers.

Results: Farmworkers required significantly higher odorant concentrations at Contact 1 and across the 2-year follow-up to detect the odor. When adjusted for Contact 1, between-group differences persisted, but odor threshold performance did not worsen over time.

Conclusions: Pesticide exposure has been linked to neurodegenerative disease, as has declining olfactory function. Persistently poorer olfactory function among pesticide-exposed workers suggests the need to monitor neurological function in this vulnerable worker population.

Copyright (C) 2017 by the American College of Occupational and Environmental Medicine