Scientists have identified “super strains” of a potentially fatal lung infection which affects cystic fibrosis patients.

Up to 80% of adults with CF are infected with the bacterium Pseudomonas aeruginosa , and must constantly take antibiotics in a bid to keep the infection – which often proves fatal – at bay.

Most acquire their own unique strain of the organism but in recent years doctors have noticed the development of strains that can be passed from one CF patient to another.