[The immunomorphology of the mucosa of the bronchi and gastroduodenal zone in children with combined disease of the bronchi and gastrointestinal tract].

Mucous membrane of the bronchi, antral zone of the stomach and duodenum were studied histologically, morphometrically, immunohistochemically and bacterioscopically in 47 children of 5 to 14 years of age with bronchial asthma (16 patients), obstructive bronchitis (12 patients), chronic pneumonia or chronic nonspecific bronchitis (19 patients). All these children had also gastroduodenitis. There was an increase of local production of IgE and enhanced degranulation of mast cells in bronchial mucosa and gastroduodenal zone in children with bronchial asthma and obstructive bronchitis. The proportion of CD4+/CD8+ decreased to 0.92 in bronchial asthma. Gastritis was associated much more frequently with Helicobacter pylori in children with chronic obstructive bronchitis and bronchial asthma.