The number of sexually transmitted infections has risen by five per cent in England in a year.
In 2018, there were 447, 694 new diagnoses of STIs, up from 424,724 in 2017, Public Health England (PHE) reported.
Gonorrhoea increased the most within the 12 months – with diagnoses rising by 26 per cent to 56,259.
Men who have sex with men were highlighted by PHE as a high-risk group, with almost half of the gonorrhoea cases being from this group.
Other high-risk groups include young people aged 15 to 24 years old and black minority ethnic groups.
The number of syphilis cases has more than doubled over the past decade, from 2,847 cases in 2009 to 7,541 in 2018.
The rise in STIs is likely due to people not using condoms correctly with new or casual partners, and an improvement in the detection of the most common STIs during testing, PHE said.
The head of STI surveillance at PHE described the rise of STIs as “concerning”.
Dr Gwenda Hughes said: “STIs can pose serious consequences to health – both your own and that of current and future sexual partners.
“No matter what age you are, or what type of relationship you are in, it’s important to look after your sexual health.
“If you have sex with a new or casual partner, make sure you use condoms and get regularly tested.”