Source of Support: None, Conflict of Interest: None
Bronchial sensitivity test was done on a total of 50 allergic rhinitis patients with a view to assess the bronchial reactivity in subjects with allergic rhinitis. It was found that the bronchial tree in 31 (62%) of 50 allergic rhinitis patients was hyper-reactive to the specific allergen though they had not yet developed overt bronchial asthma. Bronchial challenge with histamine produced a positive response more often in patients with allergic rhinitis than in normal healthy individuals. A positive response to bronchial challenge was more likely when history, endermal test and nasal provocation tests were all positive to begin with. Long term follow up of this group of allergic rhinitis patients may indicate whether they are prone to develop bronchial asthma later.