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1 .This is Scientific American's 60-Second Science. I'm Karen Hopkin. This'll just take a minute.
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2 .Just thinking about dust almost makes you sneeze.
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3 .So you might think a house with dust and a dog would be a recipe for respiratory distress.
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4 .Well, think again.
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5 .Because a new study shows that exposure to dust taken from a dog owner's home actually prevents allergies and airway infection.
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6 .In mice, at least.
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7 .The findings appear in the Proceedings of the National Academy of Sciences.
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8 .It's been known for a while that early exposure to a furry companion can reduce the risk of childhood allergies and asthma.
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9 .To find out why, researchers treated mice with dust from two homes: one with a canine resident and one was pet-free.
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10 .Turns out the rodents that were sprinkled with dog-imbued dust mounted a less aggressive immune response against a common allergen, cockroach protein.
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11 .Probing a little deeper, the researchers found the dog-dust mice had bacteria in their gut not found in the other mice, including a ton of one species of lactobacillus.
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12 .Exposing other mice to that bug alone warded off an allergic response,
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13 .and even protected them from infection with a respiratory virus.
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14 .So go tell Fido know that he's a good boy.
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15 .Because even if he doesn't fetch your slippers, he's likely contributing to your good health.
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16 .Thanks for the minute, for Scientific American's 60-Second Science. I'm Karen Hopkin.
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