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Damp and mould in homes can cause asthma, Westcountry study finds

By Western Morning News  |  Posted: August 28, 2014

By Miles Davis, Western Morning News, Twitter: @milesodavis

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Damp and mould in homes could pose a significant health risk to people with asthma according to a new study by Westcountry health experts.

By critically reviewing the findings from 17 studies in eight different countries, the research has found that the presence of several types of mould can lead to breathing problems in asthma sufferers, as well as increasing the likelihood of developing the condition.

The research has been conducted by a team at the University of Exeter Medical School and is the first time all of the information relating to mould and asthma has been analysed together.

One of the study’s lead authors, Richard Sharpe, said: “Moulds are abundant in our outdoor and indoor environments, with around 10 varieties living in a typical home. We’ve found the strongest evidence yet of their potentially harmful effects, with higher levels of some of these moulds presenting a breathing hazard to people suffering from asthma, worsening their symptoms significantly. It also looks as though mould may help to trigger the development of asthma – although research in this area is still in its infancy.”

The team identified links between a number of different types of fungi and breathing problems in asthma sufferers, among them Aspergillus and the antibiotic-producing Penicillium. They also highlighted other factors that can contribute to the risk of asthma, including house dust mites, pets and chemicals.

Characterised by typically high humidity, homes with poor heating and ventilation can be a haven for house dust mites and mould. Dampness is one of the major factors affecting the growth of mould – a problem which has been on

the rise as ageing houses are sealed and retrofitted with new energy efficient technology.

Yet we currently know very little about how people’s living habits can contribute to indoor air quality, and ultimately affect their health. This study highlights the need for homes to have adequate heating, ventilation and home maintenance – all factors that will help to reduce the presence of mould and its effects on asthma symptoms.

The research was published in the Journal of Allergy and Clinical Immunology.

Co-author and Senior Research Fellow, Dr Nick Osborne, said: “This research has highlighted the need for housing providers, residents and healthcare professionals to work together to assess the impact of housing interventions. We need to make sure that increasing the energy efficiency of people’s homes doesn’t increase their exposure to damp and mould, and potentially damage their health.”

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