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VOLUME 10 , ISSUE 1--4 ( January-December, 2024 ) > List of Articles

RESEARCH ARTICLE

Effects of Occupational Exposure to Organophosphates on Thyroid Profile among the Farmers in Nellikuppam Region of Tamil Nadu, India

K Sathish, BL Divakar Rathinam, Dipayan Deb Barman, Karnaboopathy R, Ashok Nagaraj

Keywords : Agriculture, Endocrine disrupting chemicals, Organophosphates, Thyroid hormones

DOI: 10.5005/jp-journals-10045-00313

License: CC BY-NC 4.0

Published Online: 15-12-2024

Copyright Statement:  Copyright © 2024; The Author(s).


Abstract

Background: India is primarily an agricultural country, with around 60–70% of its population dwelling on agriculture. The organophosphate (OP) class of pesticides is widely used throughout the world. However, they contain certain endocrine-disrupting chemicals (EDCs) that may lead to an increase in cancers and abnormalities in reproductive structure and function. The endocrine disruption by OPs has also been reported in the disruption of thyroid homeostasis. Materials and methods: It is a cross-sectional study conducted among farmers and agricultural laborers who have been using OP-containing pesticides for >6 months. Fasting blood (serum) samples were collected from the participants. The measurement of serum levels of thyroid hormones, which include free T3 (triiodothyronine), free T4 (thyroxine), and TSH (thyroid-stimulating hormone), and statistical analysis were carried out. Results: A total of 66 participants aged between 23 and 75 years were included and among them, 38 were female (57.6%). 26 participants have 10–20 years of exposure to OP compounds. The serum values of T3, T4, and TSH are within normal limits and no statistical significance was observed between the groups. Conclusion: The study concludes that indirect occupational exposure does not stimulate an effect strong enough to cause a drastic change and has a minimal effect on thyroid levels when measured in the nonsowing season. Further studies involving age and gender-matched controls with geographical concern are essential to investigate the change in thyroid levels with respect to the control samples.


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  1. John EM, Varghese EM, Krishnasree N, et al. In situ bioremediation of chlorpyrifos by Klebsiella sp. isolated from pesticide contaminated agricultural soil. Int J Curr Microbiol App Sci 2018;7(3):1418–1429. DOI: 10.20546/ijcmas.2018.703.170
  2. Kumar Verma D. (Editor). Microbiology for Sustainable Agriculture, Soil Health, and Environmental Protection (1st ed). New York: Apple Academic Press; 2019. DOI: 10.1201/9781351247061
  3. Lacasaña M, López-Flores I, Rodríguez-Barranco M, et al. Association between organophosphate pesticides exposure and thyroid hormones in floriculture workers. Toxicol Appl Pharmacol 2010;243(1):19–26. DOI: 10.1016/j.taap.2009.11.008
  4. Leemans M, Couderq S, Demeneix B, et al. Pesticides with potential thyroid hormone-disrupting effects: a review of recent data. Front Endocrinol 2019;10:743. DOI: 10.3389/fendo.2019.00743
  5. Eddleston M, Buckley NA, Eyer P, et al. Management of acute organophosphorus pesticide poisoning. Lancet 2008;371(9612):597–607. DOI: 10.1016/S0140-6736(07)61202-1
  6. Morello-Frosch R, Zuk M, Jerrett M, et al. Understanding the cumulative impacts of inequalities in environmental health: implications for policy. Health Aff (Millwood) 2011;30(5):879–887. DOI: 10.1377/hlthaff.2011.0153
  7. Engel SM, Berkowitz GS, Barr DB, et al. Prenatal organophosphate metabolite and organochlorine levels and performance on the Brazelton Neonatal Behavioral Assessment Scale in a multiethnic pregnancy cohort. Am J Epidemiol 2007;165(12):1397–1404. DOI: 10.1093/aje/kwm029
  8. Tamura H, Yoshikawa H, Gaido KW, et al. Interaction of organophosphate pesticides and related compounds with the androgen receptor. Environ Health Perspect 2003;111(4):545–552. DOI: 10.1289/ehp.5671
  9. Ji X, Li N, Ma M, et al. In vitro estrogen-disrupting effects of organophosphate flame retardants. Sci Total Environ 2020;727:138484. DOI: 10.1016/j.scitotenv.2020.138484
  10. Goldner WS, Sandler DP, Yu F, et al. Hypothyroidism and pesticide use among male private pesticide applicators in the agricultural health study. J Occup Environ Med 2013;55(10):1171–1178. DOI: 10.1097/JOM.0b013e31829b290b
  11. El-Sheikh AA, Ibrahim HM. The propolis effect on chlorpyrifos induced thyroid toxicity in male albino rats. J Med Toxicol Clin Forensic Med 2017;3:1–10. DOI: 10.21767/2471-9641.100023
  12. Kumar C R. A study of serum thyroid hormones in organophosphorus compounds poisoning patients. Int J Clin Biochem Res 2020;7(2):272–275. DOI: 10.18231/j.ijcbr.2020.059
  13. Ibrahim BA, Amer SA, Younis SE, et al. Chronic pesticides exposure and thyroid functions among farmers in Almnaif District—Ismailia Governorate, Egypt. Suez Canal Univ Med J 2020;23(2):117–128. DOI: 10.21608/scumj.2020.123149
  14. Kongtip P, Nankongnab N, Kallayanatham N, et al. Thyroid hormones in conventional and organic farmers in Thailand. Int J Environ Res Public Health 2019;16(15):2704. DOI: 10.3390/ijerph16152704
  15. Suratman S, Suhartono S. Pesticides exposure and thyroid hormone levels among agricultural workers and pesticide applicators: a systematic review. Jurnal Kesehatan Lingkungan 2022;14(3):178–192. DOI: 10.20473/jkl.v14i3.2022.178-192
  16. Lerro CC, Beane Freeman LE, DellaValle CT, et al. Occupational pesticide exposure and subclinical hypothyroidism among male pesticide applicators. Occup Environ Med 2018;75:79–89. DOI: 10.1136/oemed-2017-104431
  17. Toft G, Flyvbjerg A, Bonde JP. Thyroid function in Danish greenhouse workers. Environ Health 2006;5:32. DOI: 10.1186/1476-069X-5-32
  18. Wang X, Mo Z, Mao G, et al. Geographical influences on thyroid abnormalities in adult population from iodine-replete regions: a cross-sectional study. Sci Rep 2021;11(1):994. DOI: 10.1038/s41598-020-80248-7
  19. Chefirat B, Rezk-kallah H, Bettayeb H, et al. Exposure to organophosphate pesticides and thyroid function: a systematic review. Alger J Health Sci 2022;4(2):190–201. DOI: 10.5281/zenodo.7441997
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