Dog allergen (Can f 1) and cat allergen (Fel d 1) in US homes: Results from the National Survey of Lead and Allergens in Housing

Distributions of Can f 1 and Fel d 1 concentrations in US homes. Box plots represent the 0, 25th, 50th, 75th, and 100th percentiles. The house index is the mean of the sample location concentrations. The dotted lines represent the proposed thresholds of exposure that have been associated with an increased risk of sensitization (>2 ug/g for Can f 1 and >1 ug/g for Fel d 1) and asthma symptoms in allergic patients (>10 ug/g for Can f 1 and >8 ug/g for Fel d 1).

Distributions of Can f 1 and Fel d 1 house indices in US homes with and without a dog or cat living in the home at the time of the survey. Box plots represent the 0, 25th, 50th, 75th, and 100th percentiles. The dotted lines represent the proposed thresholds of exposure that have been associated with an increased risk of sensitization (>2 μg/g for Can f 1 and >1 μg/g for Fel d 1) and asthma symptoms in allergic patients (>10 μg/g for Can f 1 and >8 μg/g for Fel d 1).