Morgan Christiansen, Taylor Hoybjerg, and Ryan Cook, Brigham Young University
Life Sciences
Asthma is a chronic allergic disorder manifest by airway restriction due to inflammation, bronchoconstriction, and increased respiratory mucous secretion. As many as 300 million people worldwide are affected by asthma. It is becoming increasingly prevalent, especially in countries experiencing urbanization and Westernization. Asthma is currently the most common chronic illness among children in the U.S. and the third leading cause of hospitalization for children aged 0 – 15 yrs. Reservoir dust collection and area air sampling are the two primary methods of measuring allergen levels in house dust. Allergen sensitization leading to asthma is thought to occur prior to age six while the immune system is still naïve. In the case of the dust mite allergen Der p1, the exposure window may be as early as age two. However, little evidence is available to establish a dose–response relationship between inhalation exposure and early immunological sensitization to allergens. Temperature and relative humidity play a major role in dust mite survival and proliferation—indoor humidity above 50-60% in arid environments has been shown to support dust mite populations. Evaporative “swamp” coolers add moisture to cool the air and this increased humidity can create favorable environments for dust mite survival. The purpose of this research is to quantify the levels of dust mite antigen in homes with air conditioners and homes with swamp coolers in Utah Valley to determine the role humidity plays in the abundance of dust mite antigens. We are testing the hypothesis that homes with swamp coolers exhibit higher levels of antigen due to heightened humidity levels.