[Infections and chronic spontaneous urticaria. A review]

B Wedi, U Raap, D Wieczorek, A Kapp
Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete 2010, 61 (9): 758-64
Urticaria represents a common skin reaction pattern that can be induced by different factors. Triggering by infections has been discussed for many years but the exact role and mechanism of mast cell activation by infectious processes is unclear. In acute spontaneous urticaria, there is no doubt about a causal relationship to infections and all chronic urticaria must start as acute. Remission of annoying spontaneous chronic urticaria has been reported after successful treatment of persistent infections. Summarizing available studies evaluating the course after proven Helicobacter eradication demonstrates a statistically significant benefit compared to not-eradicated or Helicobacter-negative patients. The licensed treatment with a standard dose of H1-antihistamines is not effective in a significant number of patients and infections can be easily treated. Therefore, appropriate diagnostic procedures should be included in the routine work-up, especially the search for Helicobacter pylori.

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