Paddy Shoot
04-16-2008, 09:03 AM
Specialist equipment to tackle the dust mites that cause asthma are of little use, experts say.
Many asthmatics are allergic to tiny mites that live in dust in carpets, bedding and cuddly toys.
Researchers looked at the use of mattress protectors, specialist cleaners, high-efficiency vacuum cleaners and air filters.
The Cochrane Collaboration, an independent research group, reviewed 54 earlier studies involving 3,000 people.
Thirty-six trials assessed physical methods, such as mattress casings, 10 chemical methods, and eight a combination of chemical and physical methods.
The products were largely ineffective, but the team did find mite reduction occurred in 17 trials although it was judged not significant enough to help ward off asthma.
Lead author Dr Peter Gotzsche said: "We can conclude with confidence that there is no need to buy expensive vacuum cleaners or mattress covers or to use chemical methods against house dust mites because these treatments do not work.
"If you are wondering why it is that mattress covers and the other strategies are not effective, the likely answer is that all these treatments do not have a large enough effect on the occurrence of allergens from house dust mites.
"The level of allergens is so high in most homes that what remains after the treatment is still high enough to cause asthma attacks."
Leanne Male, assistant research director at Asthma UK, said: "This updated review confirms previous evidence which suggests that dust prevention methods have little effect on reducing overall asthma symptoms."
She said the charity recommended washing bed linen at high temperature and removing soft toys from beds could make life easier for the 90% of people whose asthma is triggered by dust mites and may enable them to manage their asthma with less medicine.
There are currently 5.2m people in the UK receiving treatment for asthma.
News Source: http://news.bbc.co.uk/2/hi/health/7349069.stm
Many asthmatics are allergic to tiny mites that live in dust in carpets, bedding and cuddly toys.
Researchers looked at the use of mattress protectors, specialist cleaners, high-efficiency vacuum cleaners and air filters.
The Cochrane Collaboration, an independent research group, reviewed 54 earlier studies involving 3,000 people.
Thirty-six trials assessed physical methods, such as mattress casings, 10 chemical methods, and eight a combination of chemical and physical methods.
The products were largely ineffective, but the team did find mite reduction occurred in 17 trials although it was judged not significant enough to help ward off asthma.
Lead author Dr Peter Gotzsche said: "We can conclude with confidence that there is no need to buy expensive vacuum cleaners or mattress covers or to use chemical methods against house dust mites because these treatments do not work.
"If you are wondering why it is that mattress covers and the other strategies are not effective, the likely answer is that all these treatments do not have a large enough effect on the occurrence of allergens from house dust mites.
"The level of allergens is so high in most homes that what remains after the treatment is still high enough to cause asthma attacks."
Leanne Male, assistant research director at Asthma UK, said: "This updated review confirms previous evidence which suggests that dust prevention methods have little effect on reducing overall asthma symptoms."
She said the charity recommended washing bed linen at high temperature and removing soft toys from beds could make life easier for the 90% of people whose asthma is triggered by dust mites and may enable them to manage their asthma with less medicine.
There are currently 5.2m people in the UK receiving treatment for asthma.
News Source: http://news.bbc.co.uk/2/hi/health/7349069.stm