IntroductionHusking, major and automatic rice mills are small scale industry in Bangladesh for the production of parboiled rice 1 . It is an important sector of employment for a large number of unskilled and semi-skilled people mostly females 2 . Lack of specific guide lines for rice mills establishment and operation, the workers there face a lot of chronic and acute problems specially from respiratory illness for occupational dust hazards exposure at various stages and at all sections of the rice mills during the operation 3,4 . The common presenting respiratory symptoms are cough, dyspnoea, wheezing and nasal irritation and /or watering and irritation and redness of eyes [5][6][7] . Normal respiratory physiology usually tries to expel the dust out of the lung [8][9][10][11] . The prevalence of the symptoms depend on composition and nature of dust, duration of exposure, altered respiratory pathphysiology, immunity status and allergies, rice mills environment, use of protective devices and many other factors 8,9 . This study was planned to assess the prevalence of symptoms of chronic respiratory problems (CRHP) in rice mill workers for their occupational exposure to dust hazards in order to assess the threshold of the problem and to make recommendation for the preventive and control measures in the country.
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