..., allergen aerosol inhalation and allergen extract infusion only caused minor changes in mechanics of breathing as well as in arterial plasma histamine concentration. Nearly 40% of the animals with a positive skin test responded to allergen inhalation with an acute airway obstruction, whereas all animals...

...I. Zimmermann; W.T. Ulmer Ascaris suum hypersensitive dogs were exposed to ascaris aerosol, histamine, and acetylcholine at different time intervals separately to the upper part of the airtract and to the lower airways. Before and during the exposure the plasma histamine concentrations were...