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Parietaria allergy in children.

J Botey1, A Torres, J Belmonte

  • 1Unitat d'Allergologia i Immunologia, Hospital Universitari Materno-Infantil, Vall d'Hebron, Barcelona.

Pediatric Pulmonology. Supplement
|March 27, 1999
PubMed
Summary

Parietaria pollen is a common allergen, especially in urban areas. This study found it becomes a frequent cause of sensitivity in children over time, even leading to asthma.

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Area of Science:

  • Aerobiology
  • Pediatric Allergy
  • Environmental Science

Background:

  • Parietaria, a Urticaceae family plant, thrives in nitrogen-rich urban environments like walls and fences.
  • Pollen monitoring in Catalonia and the Balearic Islands since 1983 tracks daily concentrations against weather conditions.
  • Parietaria pollen is prevalent year-round, particularly in cool, rainy, coastal regions.

Purpose of the Study:

  • To investigate the prevalence and impact of Parietaria pollen sensitivity in pediatric patients.
  • To analyze the trend of Parietaria pollen sensitization in children aged 1 to 15 years.
  • To assess the role of Parietaria pollen in pediatric allergic conditions, including asthma.

Main Methods:

  • Retrospective analysis of 12,650 case histories from a Pediatric Allergology Unit.
  • Identification of children with confirmed sensitivity to Parietaria pollen.
  • Correlation of sensitization patterns with patient age and allergen exposure.

Main Results:

  • Out of 12,650 children, 449 exhibited sensitivity to Parietaria pollen.
  • Exclusive Parietaria pollen sensitivity was low in younger children (1-15 years).
  • Parietaria pollen emerged as the most frequent allergen in older children after initial sensitization to domestic allergens.
  • Rhinoconjunctival symptoms were predominant, but Parietaria pollen's role in pediatric asthma was significant.

Conclusions:

  • Parietaria pollen is an important allergen in the pediatric population, with increasing significance in older children.
  • While rhinoconjunctivitis is common, Parietaria pollen allergy can contribute to the development of bronchial asthma.
  • Continued monitoring and awareness of Parietaria pollen are crucial for managing pediatric allergies.

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