A health expert has suggested that sexually-transmitted infections, particularly gonorrhoea, could develop immunity to all known antibiotics.
Speaking at a scientific meeting, Catherin Ison, director of the sexually transmitted bacteria reference library at the UK's Health Protection Agency, said that there is an increasing chance that drug-resistant strains of the infection could develop to the point that no known antibiotic could kill them.
Ms Ison said: "If this problem isn't addressed, there's a very real possibility that gonorrhoea will become a very difficult infection to treat."
The disease is currently the second most common bacterial sexually transmitted infection in the UK, however it is not known exactly how many people are affected due to many cases going un-diagnosed.
According to the Health Protection Agency, young males aged between 20 and 24 and young females around the 16 to 19 age group are most at risk.
People living in urban areas also face a higher chance of infection, the agency claimed.