27 June 2002
TOO MUCH CLEANLINESS CAN INCREASE ALLERGIES
Excessive cleanliness in babies and young children can increase their risk of developing allergies such as eczema and asthma, a study suggests.
Researchers from the University of Bristol Department of Child Health conducted a long-term study involving 11,000 children. Their parents were asked about their children's eczema symptoms and wheezing up to the age of six months, and then again between the age of 30 and 42 months. They were also questioned about how often their children's hands were washed and how often they were bathed or showered.
The results show a link between high levels of hygiene, eczema and asthma. Generally, children were not too adversely affected during the first six months of life, but the likelihood of wheezing and eczema was higher when they were 30 to 42 months old and particularly hygienic.
Dr. Andrea Sherriff, who led the study, says, "The importance of hygiene in public health should not be dismissed. However, the creation of a sterile environment through excessive cleanliness may potentially be harmful to the immune system."
Experts say that children's immune systems develop gradually throughout childhood. Other studies have also suggested that a lack of exposure to potential allergens may have detrimental effects, rather than offer protection. For example, a recent study showed that contact with pet dogs or cats could actually help boost children's immune systems.
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- Discover the facts about eczema
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