What is the classification, pathogenesis, and evaluation of occupational asthma and associated respiratory disorders?

The lungs are the most commonly affected organ by allergens and irritants in the workplace.
The fundamental characteristic of occupational asthma is the variable obstruction of the airway associated with bronchial hyperreactivity.
The prevalence of occupational asthma is estimated to be between 2% and 6% of the asthmatic population.
Personal habits such as smoking or drug use can have an adverse effect on occupational asthma.