Many owners will tell you that their pet is like a family member. A new study suggests that those four-legged family members may reduce a child’s risk of developing allergies.
For years allergists have warned parents that some pets may actually cause allergies, but a new study published in the journal Clinical & Experimental Allergy suggests that early exposure to pets, during an infant’s first year of life, appears to provide an actual defense against allergies later in life.
Lead study author Ganesa Wegienka, Ph.D., of Henry Ford Hospital in Detroit noted, “Exposing children to cats and dogs in the home is not going to increase the risk of sensitization to these animals. It might even decrease the risk.”
Interesting revelations were found in the study such as; 18 year old males, who lived with a dog in the house when they were an infant, reduced their risks of developing allergies by half, but not so with girls. Cats, on the other hand, seem to affect both sexes. Infant boys and girls who lived in a home with cats reduced their risks of developing allergies –by about 48%- by the age of 18 years.
Another finding of the analysis showed that both males and females delivered by C-section had a 67 percent less likelihood of developing a dog allergy when a dog was present in the home during their first year of life. Wegienka said that this could be due to the fact that babies born by cesarean section are not exposed to the diverse microflora that babies born vaginally are.
The long held idea that pets may cause allergies led Wegienka, and her colleagues, to study what effects childhood exposure to cats and dogs had on the risk of developing allergies to them.
For their study, the researchers analyzed blood samples of more than 500 children taken during the Detroit Childhood Allergy Study from 1987 to 1989 that followed participants from birth. The focus of the analysis was to look for the presence of an antibody known as animal-specific IgE, which would indicate that a child was sensitized to that animal. In addition, follow-up among children in the study at age 18 included additional blood samples and pet histories. The histories indicated that 184 participants had a dog, and 110 of the children had a cat, during their first year of life.
Pet allergy is an allergic reaction to proteins found in an animal’s skin cells, saliva or urine. Signs of pet allergy include those common to hay fever, such as sneezing and runny nose. Some people may also experience signs of asthma, such as wheezing and difficulty breathing. Severe allergic reactions can be deadly.
Pet allergy is often triggered by exposure to the dead flakes, or dander, that a pet sheds. Any animal with fur can be a source of pet allergy, but the most common pets are cats, dogs, rodents and horses.
Wegienka pointed out that the study does not definitively indicate that having a family pet will prevent infants from developing allergies later in life, as it only found an association between a reduced risk for allergies and exposure to cats and dogs at an early age. Wegienka cautioned, “We don’t want to say that everyone should go out and get a dog or cat to prevent allergies.” She then added, “More research is needed, though we think this is a worthwhile avenue to pursue. How does having a dog or a cat change the home environment? And, how does that affect allergy risk?”
If you have an infant and a pet sharing the house, it’s a good idea to keep an eye on your little one to make sure that he or she is able to tolerate pet dander.