Increased Sensitization to Mold Allergens Measured by Intradermal Skin Testing following Hurricanes

Area of Science:

• Allergy and Immunology
• Environmental Health
• Epidemiology

Background:

• Severe hurricanes can alter environments, potentially impacting human health and allergic sensitivities.
• Understanding the link between environmental changes and allergic responses is crucial for public health.

Purpose of the Study:

• To investigate changes in mold allergen sensitivity after exposure to severe hurricanes.
• To compare intradermal skin test reactivity to molds in patients before and after hurricane events.

Main Methods:

• Retrospective review of allergy charts from 200 patients, divided into pre-hurricane (2003-2010) and post-hurricane (2014-2015) groups.
• Intradermal skin testing was used to assess reactivity to eighteen common molds.
• Chi-square tests were employed to analyze differences in reactivity and sensitivity between the two groups.

Main Results:

• Post-hurricane patients demonstrated significantly higher positive skin test results (34.6 times more at weaker dilutions) across all tested molds (p < 0.0001).
• 95% of post-hurricane patients had at least one positive mold test, compared to 62% pre-hurricane (p < 0.0001).
• Average mold reactivity increased from 16% to 55%, with 17% of post-hurricane patients reacting to the entire mold panel, versus none pre-hurricane (p < 0.0001).

Conclusions:

• Hurricane exposure is associated with increased reactivity and sensitization to mold allergens.
• Environmental changes following hurricanes pose a significant health risk, manifesting as heightened allergic sensitivities and respiratory symptoms.
• These findings have critical implications for healthcare providers managing patients in hurricane-affected regions.