ArticleThe Journal of allergy and clinical immunology2026
Classroom microbiome signatures of pest management associate with reduced asthma symptoms.
Article in The Journal of allergy and clinical immunology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02291302 (School Inner-City Asthma Intervention Study), which is not on this map. Not yet cited in PubMed.
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The trial behind it
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School Inner-City Asthma Intervention Study
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9 authors.
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Abstract
backgroundIntegrated pest management (IPM) is thought to improve asthma symptoms through reduced mouse allergen exposure. Whether IPM acts through changes in mouse-associated microbes remains unknown.
objectivesWe examined the effects of school-based IPM on the classroom microbiome and sought to determine the association between intervention microbiome signatures and student asthma morbidity.
methodsIn this ancillary study based on a randomized placebo-controlled clinical trial of school IPM and classroom high-efficiency air purifiers (ClinicalTrials.gov NCT02291302), we performed deep metagenomics sequencing of longitudinally collected dust samples from 208 classrooms in 41 schools of 236 children with active, physician-diagnosed asthma with prospective follow-up of asthma severity during the school year. We assessed the effect of the interventions on classroom microbial communities in intention-to-treat analyses. Sparse partial least squares models were used to identify microbial signatures of the interventions, and the association between these microbial signatures and asthma morbidity was assessed by mixed-effects models, controlling for covariates including mouse allergen exposure.
resultsIPM significantly altered classroom bacterial and phage community structure and increased bacterial, archaeal, and fungal diversity. A classroom microbiome signature of IPM was identified (area under the curve = 0.84) and was associated with lower odds of any asthma symptom days in the past 2 weeks (odds ratio = 0.47; 95% confidence interval, 0.22, 0.97; P = .043) and lower Composite Asthma Severity Index (β = -0.92; 95% confidence interval, -1.51, -0.33; P = .002), adjusting for mouse allergen levels and student characteristics.
conclusionIPM-associated changes in the classroom microbiome are associated with lower asthma morbidity independent of mouse allergen exposure.
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