This study reported that respiratory symptoms consistent with bronchial responsiveness were significantly positively associated with cumulative dust exposure. A significant positive association was also reported between a physician’s diagnosis of bronchitis and dust exposure. Their study also showed a significant negative association between FEV1 and the ratio of FEV1/FVC and cumulative dust exposure.
There is substantial evidence that workers handling grain acquire allergic respiratory symptoms. The mechanism by which these symptoms occur is not yet well understood, but microbiological contaminants are likely to be a significant contributing factor. It has been reported that there is a wide range and large numbers of fungi and bacteria to which workers handling grain in the United Kingdom are exposed. More info
However, in developing countries, exposure to grain, cotton, tobacco, and tea dusts is still a serious problem. The World Health Organization reported that in developing countries, a large number of workers are employed in industries processing agricultural products, which has made the problem of exposure to vegetable dusts more serious in these countries. In these countries, it is important to implement surveillance programs for workers who are exposed to grain dust or other dusts to study the health of workers working n hazardous industries and investigate their respiratory health longitudinally as grain dust preventative measure are being implemented.