Occupational Biochemical Footprint: Variability of Erythrocyte Cholinesterase in Venezuelan Agrochemical Workers

Authors

Keywords:

erythrocyte cholinesterase, pesticide exposure, occupational health, biological surveillance, risk factors, workers

Abstract

Introduction: Occupational exposure to organophosphate and carbamate pesticides can inhibit erythrocyte cholinesterase activity, a key biomarker of biological effect.

Objective: To associate the occurrence of a relevant decrease in erythrocyte cholinesterase (≥25% from baseline) with socio-occupational variables in a population occupationally exposed to carbamate and/or organophosphate pesticides, through longitudinal follow-up during the period 2022-2023.

Methods: Quantitative, field, non-experimental, longitudinal research conducted during the years 2022–2023. Cholinesterase levels were determined using the Randa and Limperos method, modified by Edson. The sample consisted of 144 workers, and a structured questionnaire was administered. Statistical analysis included tests comparing proportions and longitudinal logistic regression (LGR) models.

Results: The work area, Liquid Insecticide Plant, maintained an independent association in the longitudinal model (adjusted OR >1) after controlling for age, seniority, employment status, and quarter.

Conclusions:

 The study showed that the decrease in serum cholinesterase activity in workers exposed to pesticides behaves as a dynamic phenomenon, sensitive to operational fluctuations and recent exposure to carbamate and/or organophosphate insecticides, rather than as a cumulative effect strictly linked to length of service or age

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Author Biography

Estela Maria Hernandez Runque, Universidad de Carabobo - Venezuela

Profesora contratada de la Universidad de Carabobo - Venezuela, ciclo básico.

References

1)Ruiz N. Factores de riesgo en productores agrícolas por la exposición a plaguicidas, en la comunidad de Vicente Guerrero, Tlaxcala. Tesis de Maestría. Repositorio Institucional Benemérita Universidad Autónoma de Puebla (BUAP). 2020 [acceso 20/02/2026]. Disponible en: https://share.google/0bWHzt1NzAupmHX8Z

2)Organiación Internacional del Trabajo. Guía para el uso de plaguicidas. Organización Internacional del Trabajo. 2022 [acceso 20/02/2026]. Disponible en: https://www.ilo.org/sites/default/files/wcmsp5/groups/public/@americas/@ro-lima/@sro-san_jose/documents/publication/wcms_840912.pdf

3)Organización Mundial de Salud. Residuos de plaguicidas en los alimentos. 2022 [acceso 20/02/2026]. Disponible en: https://www.who.int/es/news-room/fact-sheets/detail/pesticide-residues-in-food

4)Arana RD, Herrera KV, Díaz WJ, Tercero TI, Chamorro EAJ, Delgado O. Prácticas y manifestaciones en salud relacionadas a la aplicación de plaguicidas en haciendas cafetaleras. Rev cuban salud trabajo. 2025 [acceso 20/02/2026];26:e936. Disponible en: https://revsaludtrabajo.sld.cu/index.php/revsyt/article/view/936

5)Caro LJ, Forero M, Dallos AE. Inhibición de la colinesterasa como biomarcador para la vigilancia de población ocupacionalmente expuesta a plaguicidas organofosforados. Ciencia y Tecnología Agropecuaria, 2020;21(3):e1562. DOI: https://doi.org/10.21930/rcta.vol21_num3_art:1562

6)Samudio L, Espinosa JM, Moreno KN. Caracterización de la exposición a plaguicidas en trabajadores agrícolas de fincas plataneras en Barú, Chiriquí. Rev cuban salud trabajo. 2025 [acceso 20/02/2026];26:e936. Disponible en: https://revsaludtrabajo.sld.cu/index.php/revsyt/article/view/1001

7)Restrepo B, Londoño ÁL; Sánchez JF. Valores de colinesterasa plasmática y eritrocitaria con ácido 6-6‘-ditiodinicotínico (DTNA) como indicador. Revista Colombiana de Química. 2017 enero-abril;46(1):13-9. DOI: https://dx.doi.org/10.15446/rev.colomb.quim.v46n1.62849

8)Hernández Runque E, Ron M, González Argote J. Strengthening Preventive Culture: Biomedical evaluation of occupational exposure to pesticides using serum cholinesterase. Health Leadership and Quality of Life. 2024;3:e433. DOI: https://doi.org/10.56294/hl2024.433

9)Hernández Runque E, Blanco MB. Los desechos peligrosos de las industrias agroquímicas en Venezuela: visualizando claves de prevención. Revisión sistemática resumida. Revista Inclusiones. 2021;8(Número especial):169-87. Disponible en: https://revistainclusiones.org/index.php/inclu/article/view/2533

10)Zhou W, Mengmeng L, Varenyam A. A comprehensive review on environmental and human health impacts of chemical pesticide usage. Emerging Contaminants. 2025 march,11(1):e100410. DOI: https://doi.org/10.1016/j.emcon.2024.100410

11) Lefkowitz LJ, Kupina JM, Hirth NL, HenryRM, Noland GY, Barbee JY, et al.. Intraindividual stability of human erythrocyte cholinesterase activity. Clinical Chemistry 2007;8:52-8. DOI: https://doi.org/10.1373/clinchem.2006.085258

12) Wu, YQ, Wang JD, Chen JS, Chung SC, Hwan SY. Occupational risk of decreased plasma cholinesterase among pesticide production workers in Taiwan. Am J Ind Med. 1989;16(6):659-66. DOI: https://doi.org/10.1002/ajim.4700160605

13) Stefanidou M, Athanaselis S, Velonakis M, Pappas F, Koutselinis A. Occupational exposure to cholinesterase inhibiting pesticides: A Greek case. International Journal of Environmental Health Research. 2003;13(1):23-9. DOI: https://doi.org/10.1080/0960312021000063287

14) Garabrant DH, Aylward LL, Berent S, Chen Q, Timchalk C, Burns CJ, Hays SM, Albers JW. Cholinesterase inhibition in chlorpyrifos workers: Characterization of biomarkers of exposure and response in relation to urinary TCPy. Journal of Exposure Science & Environmental Epidemiology. 2008;51. DOI: https://doi.org/10.1038/jes.2008.51

Published

2026-05-18

How to Cite

1.
Hernandez Runque EM, Ron M, Hernández Romero JS. Occupational Biochemical Footprint: Variability of Erythrocyte Cholinesterase in Venezuelan Agrochemical Workers. rev cuban salud trabajo [Internet]. 2026 May 18 [cited 2026 May 20];27. Available from: https://revsaludtrabajo.sld.cu/index.php/revsyt/article/view/1058

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Original articles