Why A Clean House May Not Lower Asthma, Allergy Risk

Despite the widely accepted assumption that the rise in allergic disorders may be due to improved hygiene, a new study has found no connection between development of allergies and asthma and personal hygiene or home cleanliness. This research appears in the March issues of the American Journal of Respiratory and Critical Care Medicine.

Personal cleanliness was found to be inversely related to bacterial compounds on floors and mattresses, but home cleanliness did not reduce microbial markers (only dust amount). Muramic acid exposure was associated with a lower rate of school-age asthma, and mattress endotoxin in the first year of life was inversely linked to atopic sensitization and asthma at school age. However, the development of allergies was not related to home and personal cleanliness despite the associations of dust with cleanliness and allergic health conditions. Bacterial exposure in house dust was a factor in the development of childhood allergic disorders and asthma, but neither personal nor home cleanliness was associated with an increased risk for these disorders.

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