Birch pollen asthma in The Netherlands.

Area of Science:

• Allergy and Immunology
• Environmental Health
• Pulmonology

Background:

• Birch pollen asthma is prevalent in Scandinavia due to high pollen counts.
• Elevated birch pollen concentrations are uncommon in The Netherlands.

Purpose of the Study:

• To investigate the occurrence of birch pollen asthma in The Netherlands.
• To establish a correlation between birch pollen levels and asthmatic complaints.

Main Methods:

• Observational study during spring 1984.
• Monitoring of airborne pollen concentrations (birch, alder, hazel).
• Clinical assessment of nine patients with pollinosis and new-onset asthma.

Main Results:

• Extremely high birch pollen concentrations were recorded in The Netherlands in spring 1984.
• Alder and hazel pollen concentrations were notably low during this period.
• Nine patients experienced asthmatic symptoms that closely mirrored fluctuations in birch pollen levels.

Conclusions:

• The study strongly suggests that birch pollen asthma can occur in The Netherlands.
• High birch pollen concentrations can trigger asthma in susceptible individuals.
• This phenomenon may be observable in other Western European countries with similar climatic conditions.