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Paraquat in developing countries
C Wesseling1, B van Wendel de Joode, C Ruepert
1Central American Institute for Studies on Toxic Substances (IRET), Universidad Nacional, Heredia, Costa Rica. cwesseli@una.ac.cr
International Journal of Occupational and Environmental Health
|January 11, 2002
Summary
Paraquat herbicide exposure, especially in developing nations, poses significant health risks including acute poisoning, long-term effects like Parkinson's disease, and risks to children. Current safety assessments overlook these dangers, necessitating a precautionary approach.
Area of Science:
- Environmental toxicology
- Occupational health
- Public health
Background:
- Paraquat herbicide is widely considered safe by industry and global regulators.
- However, outdated exposure determinants persist in developing countries, with limited understanding of occupational systemic absorption.
- Significant knowledge gaps exist regarding exposure determinants, external exposure levels, biomarkers, and health outcomes.
Purpose of the Study:
- To investigate the persistent exposure determinants of paraquat herbicide in developing countries.
- To clarify the relationships between exposure, biomarkers, and adverse health outcomes.
- To advocate for regulatory re-evaluation and application of the precautionary principle.
Main Methods:
- Review of existing literature on paraquat exposure in developing countries.
- Analysis of documented cases of acute poisoning and topical injuries.
- Examination of long-term health effects linked to paraquat exposure.
Main Results:
- High rates of severe acute paraquat poisoning and topical injuries (up to 50% of workers) are documented.
- Non-worker populations, especially children, are also at risk.
- Long-term health effects include Parkinson's disease, lung damage, and skin cancer.
Conclusions:
- Regulatory agencies have underestimated paraquat's toxicity and developing-country-specific risks.
- Independent risk assessments are crucial for the developing-country context.
- Applying the precautionary principle is essential to protect vulnerable populations from paraquat's adverse effects.