MEASUREMENT OF WOOD DUST PARTICLE SIZE BY OPTICAL MICROSCOPY TECHNIQUE AND LONG-TERM EFFECT ON SAWMILL WORKERS: A RANDOM STUDY
Objective: Sawmill workers are exposed to wood dust particles of different sizes, and they cause different respiratory effects depending on the size,
physical, and chemical nature of the dust particle and also it is related to the duration of exposure.
Introduction: Many studies are done in concern with respiratory effects of wood dust exposure and its toxicity on sawmill workers. Only few studies
have been done regarding measurement of particle size. Hence, this study has been undertaken. To measure the size of wood dust particle of sawmills
to which the workers are exposed to and also to study significance to the duration of exposure to different sizes of wood dust and effect on long-term
Methods: Random samples collected from three different places of different sawmills where there is maximum production and exposure of wood
dust. The samples were analyzed and particle was measured using optical microscopy technique. 50 healthy participants from these mills were
assessed for chest expansion in cm and compared against years of wood dust exposure.
Results and Conclusion: Overall, it is observed that percentage distribution of size of wood dust particles: 45.9% <0.1 Î¼m, 23.3% 2.5-10,
22.3% 0.1-2.5 Î¼m, and 8.5% >10 Î¼m. It may be concluded that occupational hazards are directly proportional to the size of the particle and duration
of exposure to wood dust particles. Chest expansion in cm was also found reduced with the increase in the years of exposure to wood dust.
Keywords: Sawmill workers, Wood dust, Optical microscopy, Chest expansion.
Kauppinen T, Vincent R, Liukkonen T, Grzebyk M, Kauppinen A, Welling I, et al. Occupational exposure to inhalable wood dust in the member states of the European Union. Ann Occup Hyg 2006;50(6):549-61.
Weinrich AJ, Demers P. Wood dusts. In: Wexler P, editor. Encyclopedia of Toxicology. 2nd. ed. Oxford, UK: Elsevier; 2005. p. 464-7.
American Conference of Governmental Industrial Hygienists (ACGIH). Particle Size-Selective Sampling in the Workplace, Technical Committee on Air Sampling Procedures; Annals of the American Conference of Governmental Industrial Hygienists 1984;11:21.
IARC. Monographs on the Evaluation of Carcinogenic Risks to Humans, Wood Dust and Formaldehyde. Vol. 62. Lyon: International Agency Research of Cancer (IARC); 1995.
Douwes J, McLean D, Slater T, Pearce N. Asthma and other respiratory symptoms in New Zealand pine processing sawmill workers. Am J Ind Med 2001;39(6):608-15.
Bornholdt J, Saber AT, Sharma AK, Savolainen K, Vogel U, Wallin H. Inflammatory response and genotoxicity of seven wood dusts in the human epithelial cell line A549. Mutat Res 2007;632(1-2):78-88.
MÃ¤Ã¤ttÃ¤ J, Luukkonen R, Husgafvel-Pursiainen K, Alenius H, Savolainen K. Comparison of hardwood and softwood dust-induced expression of cytokines and chemokines in mouse macrophage RAW 264.7 cells. Toxicology 2006;218(1):13-21.
PylkkÃ¤nen L, Stockmann-Juvala H, Alenius H, Husgafvel-Pursiainen K, Savolainen K. Wood dusts induce the production of reactive oxygen species and caspase-3 activity in human bronchial epithelial cells. Toxicology 2009;262(3):265-70.
Mazzoli A, Favoni O. Particle size, size distribution and morphological evaluation of airborne dust particles of diverse woods by scanning electron microscopy and image processing program. Powder Technol 2012;225:65-71.
Kauffmann F, Drouet D, Lellouch J, Brille D. Occupational exposure and 12-year spirometric changes among Paris area workers. Br J Ind Med 1982;39(3):221-32.
Shamssain MH. Pulmonary function and symptoms in workers exposed to wood dust. Thorax 1992;47(2):84-7.
Bullock WH, Laird LT. A pilot study of the particle size distribution of dust in the paper and wood products industry. Am Ind Hyg Assoc 1994;55(9):836-40.
Borum G. Text Book of Pulmonary Diseases. 6th ed. Philadelphia, PA: Lippincott; 1998. p. 393, 724.
Kaplan AP. Allergy. 1st ed., Vol. 23. New York, NY: Churchill Livingstone. Inc.; 1985. p. 557, 22, 536.
Rongo LM, Besselink A, Douwes J, Barten F, Msamanga GI, Dolmans WM, et al. Respiratory symptoms and dust exposure among male workers in small-scale wood industries in Tanzania. J Occup Environ Med 2002;44(12):1153-60.
Naarala J, Kasanen JP, Pasanen P, Pasanen AL, Liimatainen A, Pennanen S, et al. The effects of wood dusts on the redox status and cell death in mouse macrophages (RAW 264.7) and human leukocytes in vitro. J Toxicol Environ Health A 2003;66(13):1221-35.
Harper M, Muller BS, Bartolucci A. Determining particle size distributions in the inhalable size range for wood dust collected by air samplers. J Environ Monit 2002;4(5):642-7.
Chandrahas MK, Gannur DG, Manjunatha A, Patil SM. Comparative study of changes in maximum expiratory pressure (MEP) in saw mill workers from Bijapur city of Karnataka state of India. Int J Curr Res Rev 2012;4(11):34-7.
Kulkarni CM, Patil SM, Gannur DG, Manjunatha A. A study of dynamic lung function tests in saw mill workers of Bijapur city. Indian J Public Health Res Dev 2014;5(1):163-8.
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