The document discusses several respiratory conditions including asthma, occupational asthma, bronchitis, and rhinitis. Bronchial asthma is defined as widespread narrowing of the bronchial airways that varies in severity and leads to coughing, wheezing, and difficulty breathing. Occupational asthma is characterized by variable airflow limitation caused by stimuli found in the workplace. The document also distinguishes between chronic and acute bronchitis and describes rhinitis as inflammation of the nose caused by allergies or infections.