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Mouse allergens in urban elementary schools and homes of children with asthma. | LitMetric
Background : The association between allergens in schools and childhood asthma has not been well studied, particularly in the United States.Objective : To investigate allergen exposure in schools compared with homes with a specific focus on children with asthma.Methods : Dust samples were collected from 46 rooms in 4 urban elementary schools (northeastern United States) and from 38 student bedrooms. Samples were analyzed for cat (Fel d 1), dog (Can f 1), cockroach (Bla g 2), dust mites (Der f 1/Der p 1), and mouse urinary protein (MUP). Questionnaires identified students with physician-diagnosed asthma.Results : Cat and dog allergens were detectable in most school samples (96% and 78%, respectively), but at low levels. Cockroach allergen was detectable in only 11% of school samples. Mouse allergen was detectable in 89% of school samples, with 68% having MUP levels greater than 0.5 microg/g. In contrast, MUP was detectable in only 26% of bedroom samples. Matched classroom and home samples from 23 asthmatic students showed higher geometric mean MUP levels in the classroom vs the home (6.45 microg/g vs 0.44 microg/g, P < .001). However, there were lower geometric mean dust mite (Der f 1) levels in the classroom vs the home (0.04 microg/g vs 0.66 microg/g, P < .001).Conclusions : There are significantly higher levels of MUP but lower levels of Der f 1 in schools vs homes. It is important to recognize that children with asthma may encounter varying levels of allergens in environments outside the home, such as schools.
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