Adverse reactions to foods and food allergy: development and reproducibility of a questionnaire for clinical diagnosis.

Objective. To develop a questionnaire as a screening tool for adverse reactions to foods in children and to assess the technical reproducibility by test-retest. Methods.

Recurrence of chronic urticaria caused by reinfection by Helicobacter pylori.

Objective: To describe a case of chronic urticaria in a female adolescent associated with Helicobacter pylori infection, confirmed in two different occasions, with improvement of urticaria after the antibacterial treatment.

Case Description: A 13-year-old female patient sought medical care with chronic urticaria and epigastric pain unresponsive to medical treatment. Laboratorial tests for further investigation were normal except for the upper gastrointestinal endoscopy with biopsy showing moderate chronic active gastritis associated with Helicobacter pylori.