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Related Experiment Videos

Cancer incidence among alachlor manufacturing workers

T Leet1, J Acquavella, C Lynch

  • 1Department of Epidemiology, Seattle, University of Washington, USA.

American Journal of Industrial Medicine
|September 1, 1996
PubMed
Summary

Chemical workers exposed to alachlor, a herbicide ingredient, showed increased risks for certain cancers. Elevated rates of colorectal cancer and chronic myeloid leukemia were observed, warranting further investigation.

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Area of Science:

  • Environmental Health
  • Occupational Medicine
  • Toxicology

Background:

  • Alachlor is an active ingredient in acetanilide herbicides.
  • Occupational and environmental exposure to alachlor can occur in chemical manufacturing settings.

Purpose of the Study:

  • To evaluate cancer incidence among chemical workers exposed to alachlor.
  • To assess the association between alachlor exposure and cancer risk.

Main Methods:

  • Historical cohort study design.
  • Followed 943 workers with at least 1 year of employment at a Monsanto plant (1968-1990).
  • Cancer status determined via statewide cancer registry.

Main Results:

  • Standardized incidence ratio (SIR) for all cancers was 1.5 (95% CI 0.9-2.4).

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  • Elevated rates primarily for colorectal cancer and chronic myeloid leukemia.
  • Workers with high alachlor exposure (≥5 years) showed elevated colorectal cancer rates (SIR = 5.2, 95% CI 1.1-15.1).

    • Conclusions:

    • Findings suggest a potential link between alachlor exposure and increased cancer risk.
    • Study limitations include small population size and short follow-up period.
    • Continued evaluation of alachlor-exposed cohorts is recommended.