Occupational asthma is related to occupations and caused by antigens existing in the workplace. Occupational asthma can be further divided into “sensitizer-induced asthmas,” which are associated with an immunological and allergic mechanism, and “irritant-induced asthmas,” which occur due to aspiration of a large quantity of an irritant at the workplace. 15% of population in Japan has Occupational Asthma incidence. 13 cases are due to sericulture (due to silk Industries) asthma, 45 asthma like symptoms appeared, 78 non sericulture asthma.
As occupational respiratory diseases can be difficult to identify and control, their prevention is likely to be more effective by implementing complementary actions such as education towards employers, workers, and physicians, research in order to identify new hazards and their impact on workers’ health and review of workplace safety and standards on an ongoing basis. This process is best informed by a comprehensive national surveillance scheme to assist in effective targeting of preventive measures. Many researches are under taken by National Asthma Council about Occupational Asthma.