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For decades, lung disease has been the most visible and life-threatening part of cystic fibrosis. People might picture chronic (long-term) cough, breathlessness, recurrent chest infections and oxygen therapy.

BBC Sport NI speaks to Irish golfer David Howard, who discusses being diagnosed with cystic fibrosis aged seven and qualifying for The Open at Royal Birkdale.

Pseudomonas aeruginosa is an opportunistic pathogen that can cause acute and chronic infections. Responsible for many hospital-acquired infections, it is also a major concern for people with cystic fibrosis, whose lungs are clogged with thick mucus that promotes its growth.