Work-related Respiratory Symptoms and Ventilatory Disorders among Employees of a Cement Industry in Shiraz, Iran

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概要

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• Although the main hazard in cement processing is dust and respiratory tract disorders are the most important group of occupational diseases in this industry, evidence for associations between exposure to cement dust and either respiratory symptoms or functional impairment has not been conclusive. This study was, therefore, undertaken to more thoroughly examine the effects of occupational exposure to cement dust on the respiratory system. The study population consisted of a group of 88, randomly selected, male workers with current exposure to cement dust and 80 healthy male office workers without present or past history of exposure to dust that served as the referent group. Subjects were interviewed and were given respiratory symptom questionnaires to answer. They also underwent chest X-ray and lung function tests. Additionally, personal dust monitoring for airborne inhalable and respirable dust was carried out at nine different worksites. Moreover, X-ray diffraction (XRD) and X-ray fluorescence (XRF) techniques were performed to determine the sillica phases and the SiO_2 contents of the dust samples. Levels of exposures to inhalable and resipirable cement dust were estimated to be 53.4±42.6 and 26±14.2 mg/m^3, respectively (Mean±SD). Statistical analysis of the data revealed that symptoms like regular cough, phlegm, wheezing and shortness of breath were significantly (p<0.05) more prevalent among exposed workers. Similarly, chest rediographs of exposed workers showed various degrees of abnormalities including emphysematous changes, old calcified granulomas, emphysematous changes associated with inflammatory processes, evidence of chronic inflammatory processes, focusal calcification of the lungs and infiltrative changes. However, no significant changes were noted in the radiographs of the referent group. Furthermore, exposed workers compared to their referent counterparts showed significant reductions in the parameters of lung function. In conclusions, our data provide corroborative evidence further substantiating the contention that exposure to cement dust is associated with respiratory symptoms and functional impairments.

• 社団法人日本産業衛生学会の論文

著者

• Choobineh Alireza

  Occupational Health Department School Of Health Shiraz University Of Medical Sciences

• NEGHAB Masoud

  Occupational Health Department, School of Health, Shiraz University of Medical Sciences

• Neghab Masoud

  イラン

• Choobineh Alireza

  Occupational Health Dep. Res. Center For Health Sciences School Of Health And Nutrition Shiraz Univ.

関連論文

• Musculoskeletal Problems among Workers of an Iranian Rubber Factory
• Work-related Respiratory Symptoms and Ventilatory Disorders among Employees of a Cement Industry in Shiraz, Iran

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