The 6 year study followed 1,984 Finnish children aged 1 to 7 years to see if they developed asthma. Researchers recorded if a child's parents had asthma or allergies, and looked at the condition of their houses, noting histories of water damage, presence of moisture and visible moulds, and perceived mould odour in the home. A total of 138 children developed asthma, 7.2% of the study, with mould cited as a contributing factor independent of parents' medical histories.
Professor Jouni Jaakkola, Director of the University of Birmingham's Institute for Occupational and Environmental Medicine explains: "These finding strengthen evidence that exposure to moulds increases the risk of developing asthma in childhood. They also show the importance of heredity - children of parents with asthma have a two-fold risk of asthma compared with children of non-asthmatic parents".
He adds: "The results of this study are of interest in every country where housing stock is prone to damp, and add to previous studies linking asthma with chemicals and cigarette smoke. Simple ways to protect children against developing asthma include keeping damp and mould at bay, exposing children to fresh air, and never letting them breathe second hand cigarette smoke".