[Relation between month of birth and the manifestation of atopic diseases in children and adolescents].

A total of 354 children with atopic diseases (asthma, pollenosis, dermatitis) were examined. Less than half of them (46.6%) had atopy in their families. Children of atopic parents often had two atopic diseases. Hypersensitivity to single allergen occurred in 66% (234/354) of patients and to more than one allergen in 34% (120/354) of patients. It seems that the season of birth might be important for children sensitized to pollens (born on the eve of pollen season). For the children sensitized to Dermatophagoides pteronyssimus season of birth was not decisive.