Fernández-Solà, Joaquim, Lluís Padierna, Meritxell, Nogué Xarau, Santiago et al. · Medicina clinica · 2005 · DOI
This study followed 26 people who developed ME/CFS after being exposed to insecticide sprays at their workplace. Most patients were women who first experienced airway inflammation and digestive problems, followed by brain fog, muscle pain, and fatigue. About one-third also developed chemical sensitivity. The researchers emphasize that proper ventilation and safety precautions during and after insecticide use are crucial to prevent these illnesses.
This study provides clinical documentation that environmental toxic exposures can trigger ME/CFS-like illness in occupational settings, highlighting the importance of environmental factors in disease pathogenesis. It also emphasizes prevention through workplace safety, which is actionable for employers and workers. Understanding toxin-triggered ME/CFS may inform mechanistic research and identify at-risk populations.
This study does not prove that insecticide exposure causes ME/CFS in the general population, only that it may trigger CFS in some exposed individuals. It cannot establish causation definitively due to lack of a control group and potential confounding variables. The findings cannot be generalized to non-occupational exposures or to populations with different health baselines.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
The first block is for the primary paper and is the citation you should use in research work. The atlas-snapshot line only applies if you are specifically referring to this atlas’s reading of the paper on the date shown.
Primary citation
Fernández-Solà, Joaquim, Lluís Padierna, Meritxell, Nogué Xarau, Santiago, & Munné Mas, Pere (2005). [Chronic fatigue syndrome and multiple chemical hypersensitivity after insecticide exposure].. Medicina clinica. https://doi.org/10.1157/13073217
BibTeX
@article{mecfsatlas-fernndez-sol-2005-chronic-fatigue,
author = {Fernández-Solà, Joaquim and Lluís Padierna, Meritxell and Nogué Xarau, Santiago and Munné Mas, Pere},
title = {[Chronic fatigue syndrome and multiple chemical hypersensitivity after insecticide exposure].},
journal = {Medicina clinica},
year = {2005},
doi = {10.1157/13073217},
note = {PubMed: 15826581},
url = {https://www.mecfsatlas.com/evidence/fernndez-sol-2005-chronic-fatigue},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-30. https://www.mecfsatlas.com/evidence/fernndez-sol-2005-chronic-fatigue
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