Scarlet fever is a classic childhood disease. It is one of the most common bacterial infections in this age bracket. Scarlet fever bacteria, A-streptococcus, occur around the world and usually cause throat inflammation and a skin rash. The bacteria may produce toxins. After having had the disease, the patient will be protected from the respective toxin of the pathogen. Since the bacteria form different toxins, however, it is possible to have scarlet fever several times. Scarlet fever is highly contagious and therefore often occurs in larger numbers in community facilities such as nurseries or schools, specifically during the colder season between October and March.
Every fifth to tenth person carriers the scarlet fever pathogens without falling ill. Nevertheless, these persons can pass on the bacteria to others. The pathogens are usually located in the area of the throat. When speaking, coughing or sneezing, the pathogens will enter the air through tiny spittle droplets and adhere to the contact person's mucous membrane when inhaled.
Extremely rarely, people will catch scarlet fever through shared objects such as cutlery or toys if the pathogens are adhering to them.
At first there usually is a headache, throat ache, problems swallowing, chills and quickly rising fever. Stomach ache and vomiting are possible as well. The palate and throat are red, the tonsils are inflamed and may have white plaque. The lymph nodes at the neck swell strongly.
After 1 to 2 days, a non-itching skin rash develops that spreads across the armpits, chest area and groin to the entire body. The palms and soles of the feet are not affected. The cheeks are strongly reddened and the skin around the mouth is pale. The rash will disappear again after 6 to 9 days. Some days later, the skin will flake off particularly on the palms and soles of the feet.
Typically, scarlet fever also comes with the "raspberry tongue": First, the tongue shows white plaque. After a few days, it reddens to a raspberry colour.
Possible complications are inflammation of the middle ear, the sinuses and the lungs. Acute rheumatic fever with inflammation of the large joints such as the knees, the heart muscle, pericardium, heart valves or inflammation of the kidneys is a rare but highly feared late consequence. This may cause lasting damage. Complications occur more frequently if scarlet fever is not treated with antibiotics or if the antibiotics treatment is discontinued early.
There are usually 1 to 3 days between infection and outbreak. If scarlet fever is treated with antibiotics, 24 hours after the first dose there is no risk of infection anymore. Without antibiotics, patients are contagious for up to 3 weeks after the first symptoms.
Anyone can contract scarlet fever. It is most common among children who attend a day nursery or school.
Your local health authority can provide you with further advice. You will find more information on the current situation and great experience in handling of diseases there.
More (specialist) information is also available online from the Robert Koch Institute (www.rki.de/scharlach).
For more information on how hygiene can guard against infection, please visit the Federal Centre for Health Education website (www.infektionsschutz.de).