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Cats Can Trigger Eczema in Some Infants
Date:6/25/2008

Babies with a genetic mutation and a cat at home were more likely to develop skin condition before age of 1, study finds

WEDNESDAY, June 25 (HealthDay News) -- Infants who have a certain genetic mutation are more likely to develop eczema if there is a cat in the home, a new study suggests.

The idea that genetic mutations associated with a disease can be triggered by environmental exposures is not a new one, the researchers from Denmark and Great Britain noted.

"It's more of an example of a mechanism that's likely to happen between genes and the environment. It's sort of proof of a concept, or an idea that's been around for years," said study author Dr. Hans Bisgaard, of the Danish Pediatric Asthma Center at the University of Copenhagen. "You can have a gene for many diseases but never have the disease if you aren't exposed to triggers."

In the study, infants with the FLG mutation were studied in two groups, a high-risk group in Denmark and a representative sample in Great Britain. Children with the mutation were twice as likely to develop eczema during their first year of life. Those with the mutation and a cat in their home from the time of their birth had a further increased risk of having eczema. The study was published in the June issue of PLoS Medicine.

Eczema, or atopic dermatitis, begins in the first year of life for 65 percent of the people who have the condition, according to the National Institute of Arthritis and Musculoskeletal and Skin Diseases. About 20 percent of all infants and children have symptoms.

Bisgaard explained that the study did not determine how exposure to cats triggered the eczema, but it did demonstrate that the eczema was not an allergic reaction to cats.

"It's probably too early to tell parents to go out and shoot the cat," Bisgaard added, because the finding needs to be replicated. "What is often misleading is that people try to learn som
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