Cases of occupational asthma should be viewed as sentinel events that automatically trigger further action in the workplace. Assume that other people with similar exposures are at similar risk. To prevent further cases, modifications in the workplace can control exposures. Despite an initial investment by the employer, this is actually the most cost-effective way to deal with this issue. Depending on the situation, the change can be quick and inexpensive.
Primary prevention is the best way to control occupational asthma.
This focuses on preventing cases from ever developing. It is done by performing a risk assessment of the task to anticipate exposure to asthma causing agents. Reviewing the contents of the products, how the products are used, the potential by-products, and actually observing the task are the next steps. A written or verbal description of how something is done may leave out some very important details, so observation is essential. Air samples may be collected to determine actual exposures, if, given their limitations, they are appropriate.