[Bronchoreactivity induced by physical exercise and methacholine in children with rhinitis and allergic asthma. A...

Bronchial provocation tests (TBP) allow to detect airways hyperreactivity in asthmatics. Twenty asthmatic children and sixteen rhinitics underwent a standard methacholine challenge and a free running exercise test on two separate days. Metacholine challenge pointed out bronchial hyperreactivity in 90% of the asthmatics. An exercise induced bronchospasm occurred in 70% of them. TPB resulted positive also in 18% of the rhinitics. Our study confirms diagnostic usefulness of the TBP and a good correlation between both tests.