Around one third of Strep A cases recorded in Jersey since summer occurred in the first two weeks of December alone, according to new Government data.
Between 4 July and 11 December, 88 cases of scarlet fever - which is caused by Group A Strep or 'GAS' - were reported in Jersey.
A third of these cases, around 30, have been reported in the last month.
The figures are being collated on a weekly basis, and the next update will come next week.
Although Strep A infections are usually mild, they can develop into the more serious invasive Group A Strep infection, which has led to the deaths of at least 19 children in the UK since September.
Dr Ivan Muscat, the Deputy Medical Officer of Health said: “Although data collection varies from country to country, we have seen the same recent uptick in Jersey that has been witnessed in England, Scotland, Ireland, France, the Netherlands, Sweden and other countries.”
He added: “Despite the uptick in cases, I would like to reassure islanders that early antibiotic treatment stops infectivity within 24 hours and prevents the uncommon but severe complications which can arise from this infection.
"Islanders can help reduce this risk through good hand, respiratory and environmental hygiene.
"Having the flu vaccination can also help to reduce your risk.”
A sore throat.
Headache.
Nausea and vomiting.
A fever of 38°C or higher
A fine pinkish or red body rash with a sandpapery feel. This rash comes with a red face, except the area around the mouth.
A white coating around the tongue which then peels leaving a red swollen tongue.
Patients who have features of scarlet fever should see their GP as soon as possible for early treatment.
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