In schools and home, mouse allergen is more common and exposure to mouse allergen at school was associated with increased asthma symptoms and lower lung function.
A new article by Wanda Phipatanakul, M.D., M.S., of Boston's Children's Hospital and Harvard Medical School, Boston, and coauthors examined if air-borne allergens in schools affect students' asthma symptoms? in a study that included 284 students (ages 4 to 13) enrolled at 37 inner-city schools in the northeastern United States.
‘Exposure reduction strategies in the school setting may effectively and efficiently benefit all children with asthma.’
Classroom and home dust samples linked to the students were collected and analyzed for common indoor allergens, including rat, mouse, cockroach, cat, dog and dust mites. Associations between school exposure to allergens and asthma outcomes were adjusted for exposure to the allergens at home.
Apart from mouse allergen, none of the other airborne allergens were associated with worse asthma outcomes. While cat and dog allergens were commonly detected in the schools, dust mite levels were low and cockroach and rat allergens were mostly undetectable in schools and homes.
Limitations of the study include results that may not be generalizable to other cities where other allergens may be predominant in schools.
"These findings suggest that exposure reduction strategies in the school setting may effectively and efficiently benefit all children with asthma. Future school-based environmental intervention studies may be warranted," the authors conclude.