This is not the first time researchers at Cardiff University have made the link between fungi and asthma. Previous research found that removing fungi from people's homes could help improve life for asthma sufferers.
Historically, the lungs were thought to be sterile. Our analysis found that there are large numbers of fungi present in healthy human lungs. The study also demonstrates that asthma patients have a large number of fungi in their lungs and that the species of fungi are quite different to those present in the lungs of healthy individuals
Establishing the presence of fungi in the lungs of patients with asthma could potentially open up a new field of research which brings together molecular techniques for detecting fungi and developing treatments for asthma.
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Feeling humid with heavy showers and thunderstorms moving north overnight into Sunday.
Four people, including three children, were taken to hospital to be checked for smoke inhalation.
Heavy rain and thunderstorms will affect many parts of Wales this weekend - particularly during Saturday evening.