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Bacterial protein in house dust spurs asthma according to NIH study (NIH press release)

A bacterial protein in common house dust may worsen allergic responses to indoor allergens, according to research conducted by the National Institutes of Health and Duke University. The finding is the first to document the presence of the protein flagellin in house dust, bolstering the link between allergic asthma and the environment.

Scientists from the NIH's National Institute of Environmental Health Sciences (NIEHS) and Duke University Medical Center published their findings in people and mice online Oct. 14 in the journal Nature Medicine.

"Most people with asthma have allergic asthma, resulting largely from allergic responses to inhaled substances," said the paper’s corresponding author Donald Cook, Ph.D., an NIEHS scientist. His research team began the study to identify environmental factors that amplify the allergic responses. "Although flagellin is not an allergen, it can boost allergic responses to true allergens."

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