Sexually transmitted diseases (STIs) are a cause for concern for people of any age group, not just the young.
This is the view of Linda Bailey from the Royal College of Nursing, who told the BBC that "while the incidence of STIs among older adults may be small compared with teenagers and young adults, it is there and it is growing".
She suggested that the fact that more people are becoming newly-single after long marriages and relationships could be behind the increase in the number of diagnoses in the over-40s.
The Health Protection Agency revealed that between 1999 and 2008, there was a 53 per cent increase in the number of men aged between 45 and 64 diagnosed with gonorrhoea.
A 93 per cent increase was recorded among women of the same age group.
Problems caused by STIs can range from "mild embarrassment through to life-long infertility or in the most serious of cases, premature death", the nurse added.
Independent advice on private healthcare