For their study, researchers from Kuopio University Hospital
in Finland evaluated nearly 400 infants born at the hospital between September
2002 and May 2005. The team asked parents of these children to fill out
questionnaires about their children's health from the time these children were
born until they reached their first birthdays.
The questionnaire, which was structured more in the form of
a daily diary, kept tracks of the number of infections the children developed,
as well as how often they experienced things like fevers, runny noses, coughs,
and wheezing. The frequency of these and other conditions was then analyzed in
light of whether or not the children had a dog or cat living at home with them.
Overall, 35 percent of the children evaluated spent a
majority of their first year of life in regular contact with a pet dog, while
24 percent lived in direct contact with a cat. Compared to children who lived
with no pets at home, those who lived with a dog were more than 31 percent
healthier during any given week than those who did not live with a dog, based
on the parents' diary reports.
Children living in families with dogs were also 44 percent
less likely to develop inner ear infections, and 29 percent less likely to need
antibiotic drugs, than children living in families without dogs. Children
living with dogs, in fact, were the least likely of all children, including
those living with cats, to develop any sickness at all, and were the healthiest
among all the children.
"These results suggest that dog contacts may have a
protective effect on respiratory tract infections during the first year of
life," wrote lead author Eija Bergroth of Kuopio University Hospital,
concerning her and her team's findings. "Our findings support the theory
that during the first year of life, animal contacts are important, possibly
leading to better resistance to infectious respiratory illnesses during
childhood."
A 2011 study published in the New England Journal of
Medicine (NEJM) uncovered similar findings among children living on farms. It
appears as though children exposed to a variety of unique germs and microbes in
the family-farm environment develop stronger immunity, and are thus far
healthier, than children living in more "sanitary," urban
environments.
Sue Taylor
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