This type of E. coli can cause severe gastrointestinal symptoms, including bloody diarrhea. The infections were confirmed through PCR testing of stool samples, and bacterial culture results from Landspítali hospital are pending, which may take several days. The preschool has more than 100 children enrolled.

The severity of symptoms among the children varies, mostly presenting as diarrhea and even bloody diarrhea. This morning, four children were admitted to the Children’s Hospital, and another four are undergoing further evaluation at the emergency department. One child is in serious condition in the intensive care unit. As a precaution, Mánagarður preschool has been temporarily closed for the week while the situation is investigated.

Investigation and Response

A task force has been assembled, including representatives from the Chief Epidemiologist, the primary care service, municipal public health, the Food and Veterinary Authority, MATÍS, and doctors from Landspítali’s microbiology department. They are working to determine the source of the infections and take steps to prevent further spread. While the source has not yet been confirmed, contaminated food is suspected. Reykjavík´s public health authorities are conducting a food safety investigation and advising the preschool on proper sanitation measures.

E. coli Infections

STEC infections can be transmitted between animals and humans, with ruminants like cattle being common carriers. Humans can become infected by consuming contaminated food or water, or through direct person-to-person contact, especially among young children. Common food sources of infection include undercooked beef products (like hamburgers) and unpasteurized milk, although other foods can also be involved in STEC outbreaks.

STEC produces a toxin that causes a range of symptoms, from mild diarrhea to more serious conditions like bloody diarrhea, stomach cramps, and vomiting. In some cases, people may not show any symptoms but can still carry the bacteria.

A serious complication of STEC is hemolytic uremic syndrome (HUS), which is more common in children under 10. HUS can cause kidney failure, hemolytic anemia, and low platelet counts, leading to bleeding. In severe cases, specialized kidney treatment may be required.

Advice for Families

Parents should follow these guidelines regarding STEC infections:

• If a child has no symptoms, they can continue with normal activities, but handwashing and good hygiene-especially around diaper changes-are essential. Always wash hands before and after meals.

• For mild gastrointestinal symptoms, contact the healthcare information line at +354-513-1700 for advice, and ensure the child stays well-hydrated.

• If a child shows severe symptoms such as bloody diarrhea, vomiting, abdominal pain, or lethargy, contact the emergency department for children at Landspítali immediately.

The Chief Epidemiologist

Further Information:

• Website of the Directorate of Health: Infectious Diseases A-Z (E. coli)

• Website of the Food and Veterinary Authority (MAST)