A new University of Alberta study showed that babies from families with pets—70 per cent of which were dogs—showed higher levels of two types of microbes associated with lower risks of allergic disease and obesity.
The theory is that exposure to dirt and bacteria early in life—for example, in a dog’s fur and on its paws—can create early immunity, though researchers aren’t sure whether the effect occurs from bacteria on the furry friends or from human transfer by touching the pets, said Kozyrskyj.
“The abundance of these two bacteria were increased twofold when there was a pet in the house,” said Kozyrskyj, adding that the pet exposure was shown to affect the gut microbiome indirectly—from dog to mother to unborn baby—during pregnancy as well as during the first three months of the baby’s life. In other words, even if the dog had been given away for adoption just before the woman gave birth, the healthy microbiome exchange could still take place.
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