Allergic diseases in farmers' children

Area of Science:

• Environmental Health
• Epidemiology
• Allergology

Background:

• Studies indicate lower allergy prevalence in rural children, often attributed to reduced air pollution.
• Previous research in South Bavaria suggested home heating methods (coal/wood) correlate with reduced hay fever and sensitization.
• The Swiss SCARPOL study investigated the impact of parental occupation on childhood allergies.

Purpose of the Study:

• To investigate environmental factors beyond air pollution that may explain lower allergy rates in rural settings.
• To assess the association between farming as a parental occupation and the risk of hay fever and allergic sensitization in children.
• To explore potential explanations for observed protective effects in rural and farming environments.

Main Methods:

• Analysis of data from rural South Bavaria on home heating and allergy-related outcomes.
• The SCARPOL study involved questionnaires and serum IgE testing in Swiss schoolchildren (ages 6-15).
• Comparison of allergy and hay fever rates between children from farming and non-farming households.

Main Results:

• Children using coal/wood heating showed significantly lower odds of hay fever, sensitization, and bronchial hyperresponsiveness.
• Parental occupation as farmers was significantly associated with lower reported hay fever symptoms and allergic sensitization.
• Children from farming environments had substantially lower odds of sneezing attacks and allergen sensitization compared to non-farming peers.

Conclusions:

• The farming environment is associated with a reduced risk of hay fever and allergic sensitization in children.
• Factors such as increased microbial stimulation, traditional lifestyles, and housing conditions may contribute to this protective effect.
• The specific environmental factor responsible for the protective effect of farming environments requires further investigation.