Chronic Idiopathic Urticaria: Natural Course and Association with Helicobacter pylori InfectionSchnyder B. · Helbling A. · Pichler W.J.
Institute of Immunology and Allergology, Inselspital, Bern, Switzerland
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Background: Chronic urticaria is a common disease, though only few data on its natural course are available. In most cases the cause cannot be determined. Recently a relationship of chronic urticaria to infection with Helicobacter pylori (HP) has been postulated, but no controlled study has been performed to prove this association. Methods: In this prospective study the clinical course and rate of HP infection in 46 patients with chronic ‘idiopathic’ urticaria were investigated. Infected patients were treated in a double–blind placebo–controlled crossover study with amoxycillin and lansoprazol. Eradication and clinical course were followed up 2 months after each treatment, respectively, 3 and 6 months after the first consultation. Results: In 19/46 (41%) the chronic ‘idiopathic’ urticaria resolved within 6 months. 12 patients (24%) were infected with HP, which corresponds to the infection rate of the population at comparable ages without urticaria in Switzerland. Eradication of HP was achieved in 3, but only in 1 was the eradication associated with the resolution of urticaria. Conclusions: Our data show that in young patients with a rather short history of chronic urticaria frequently a rather favourable natural course of chronic idiopathic urticaria can be seen. No association between HP infection and chronic urticaria could be demonstrated.
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