Patients' resistance to antibiotics 'alarming'
16 November 2012 Last updated at 15:08 GMT
Resistance to antibiotics is one of the greatest threats to modern health, experts say.
The warning from England's chief medical officer and the Health Protection Agency comes amid reports of growing problems with resistant strains of bugs such as E. coli and gonorrhoea.
They said many antibiotics were being used unnecessarily for mild infections, helping to create resistance.
And they urged patients to take more care with how they used medicines.
Branwen Jeffreys reports.