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Archive for November 14th, 2017

Two new studies show dogs can protect children from allergies, eczema

SONY DSC Even before your human baby is born, having a dog in the house can protect him or her against developing allergic eczema.

According to a study presented at the American College of Allergy, Asthma and Immunology (ACAAI) Annual Scientific Meeting, babies born in a home with a dog during pregnancy receive protection from allergic eczema, at least in their early years.

The study was one on two presented at the conference in Boston dealing with protections dogs provide to children with allergies — even allergies to dogs.

In the second study, researchers examined the effects of two different types of dog exposure on children with asthma in Baltimore, according to Medical News Today.

The first type was the protein, or allergen, that affects children who are allergic to dogs. The second type were elements, such as bacteria, that a dog might carry.

The researchers concluded that exposure to the elements that dogs carry may have a protective effect against asthma symptoms. But exposure to the allergen may result in more asthma symptoms among urban children with dog allergy.

“Among urban children with asthma who were allergic to dogs, spending time with a dog might be associated with two different effects,” says Po-Yang Tsou, MD, MPH, lead author. “There seems to be a protective effect on asthma of non-allergen dog-associated exposures, and a harmful effect of allergen exposure.”

In the first study, led by ACAAI member Dr. Gagandeep Cheema, researchers investigated how exposure to dogs before birth influenced the risk of childhood eczema.

Eczema is a condition characterized by rashes and patches of dry, itchy skin, most commonly on the hands, feet, face, elbows and knees.

While the causes of eczema remain unclear, it is believed to arise when the immune system overreacts in response to certain allergens or irritants.

“Although eczema is commonly found in infants, many people don’t know there is a progression from eczema to food allergies to nasal allergies and asthma,” Cheema said in a press release. “We wanted to know if there was a protective effect in having a dog that slowed down that progress.”

“We found a mother’s exposure to dogs before the birth of a child is significantly associated with lower risk of eczema by age 2 years, but this protective effect goes down at age 10,” says allergist Edward M. Zoratti, MD, ACAAI member and a study co-author.

(A girl and her dog in Baltimore, by John Woestendiek)