Latest figures show that Bexley and Lewisham are among authorities in London with the highest scarlet fever cases.
The data, which is released by the UK Health Security Agency, shows Lewisham has the highest toll in London with 11 infections.
Three cases of the more serious invasive Strep A disease have also been recorded in Bromley and Greenwich.
There is a total of 15 invasive diseases recorded in the whole of the UK.
Bexley reported 10, Bromley recorded four, while Greenwich also reported seven scarlet fever cases across south east London.
These figures were reported in the seven days up to December 11.
Scarlet fever is caused by a bacteria called Group A Streptococcus, also known as Strep A.
The vast majority of Strep A infections are mild but occasionally a serious invasive infection can be caused.
Symptoms of scarlet fever include sore throat, headache, and fever, along with a fine, pinkish or red body rash with a “sandpapery” feel.
A total of 1,702 cases of scarlet fever were reported in England and Wales in the week up to December 11, with 108 of these in London, according to UKHSA.
London has the third highest regional total of scarlet fever cases in England, behind the South East (209) and East of England (191).
The full list of infections recorded in each borough in the week up to December 11 is as follows:
Hackney: One infection
Hammersmith and Fulham: Three infections
Harringay: One infection
Kensington and Chelsea: One infection
Lambeth: Four infections
Lewisham: 11 infections
Southwark: Three infections
Wandsworth: Six infections
Westminster: Four infections
Bexley: 10 infections
Brent: Four infections
Bromley: Four infections
Croydon: Three infections
Ealing: 11 infections
Greenwich: Seven infections
Harrow: Three infections
Hillingdon: Eight infections
Hounslow: One infection
Kingston Upon Thames: Six infections
Merton: Seven infections
Redbridge: One infection
Richmond upon Thames: Six infections
Sutton: One infection
Waltham Forest: Two infections