Scarlet fever is one of the most common bacterial infectious diseases in children. Scarlet fever bacteria are group A streptococci that occur around the world and usually cause throat inflammation, fever and a rash. The bacteria may produce toxins, which cause the symptoms. After having had scarlet fever, sufferers are protected from getting ill with the same toxin of the causal pathogen. However, since the bacteria form different toxins, 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.
The bacteria are usually located in the throat area. When speaking, coughing or sneezing, the pathogens will enter the air through tiny saliva droplets and settle in the contact person‘s mucous membrane when inhaled. The scarlet fever bacteria may enter a person‘s body without them getting ill themselves. However, they can pass the bacteria on to others.
The disease can also be transmitted via hands or by shared objects such as cutlery or toys if pathogens adhere to them.
At first, sufferers usually experience a headache, sore throat, difficulty swallowing, chills and a rapidly rising fever. Stomach pains and vomiting are possible as well. The palate and throat are red, the tonsils are inflamed and they may be covered with a white coating.
After 1 to 2 days, a non-itchy rash develops that spreads across the entire body. The palms and soles of the feet are not affected. The cheeks are really red and the skin around the mouth is pale. The rash usually disappears 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 a change in the tongue: At first it is covered with a white coating and after a few days it turns red (“raspberry tongue”).
Infection with scarlet fever bacteria can lead to further health problems. These may include, for example, a deep throat infection and inflammation of the middle ear and sinuses. In rare cases, this may also cause myocarditis or meningitis. Life-threatening infections with scarlet fever bacteria are rare in Germany. A possible but very rare secondary disease is acute rheumatic fever with inflammation of the large joints and heart and impairment of the kidneys.
There are usually 1 to 3 days between infection and outbreak of the disease.
If scarlet fever is treated with antibiotics, around 24 hours after the first dose there is no risk of infection anymore. Without antibiotics, sufferers can be contagious for up to 3 weeks after the first symptoms.
Anyone can contract scarlet fever. However, it is most common among children who attend a day nursery or school.
There is no vaccination against scarlet fever.
Your local health authority can provide you with further advice. It has information on the latest situation and a wealth of experience in dealing with the disease.
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).