Chlamydia is the most common form of sexually transmitted infection and often shows no symptoms. Left untreated it can lead to fertility problems for women and men. The disease is particularly prevalent in younger people under the age of 25.
The latest data from Public Health England for 2013 shows that of the 1.7 million 15-25 year-olds screened, 300,000 were in London. That gives London a rate of 27.7% compared to the national figure of 24.9%.
Most boroughs achieve the national level but Lambeth, Wandsworth, Camden and Hackney are easily surpassing it. Bexley, Enfield and the north west boroughs of Brent, Harrow and Ealing are the only ones falling below national level.
A screening test for chlamydia does not require an examination. Testing is done at GP surgeries, GUM clinics and through special services at pharmacies and colleges provided for under 25s by the National Chlamydia Screening Programme. Chlamydia is treated with antibiotics.
Some of the areas with the best screening rates in London also have the highest levels of other sexually transmitted infections, which suggests that screening is being offered while other treatments are being carried out at GUM clinics.
More information about chlamydia here