Since 15 December 2023, 68 people from 14 regions have been reported infected with Cryptosporidium in Sweden. Most of the disease cases are from Halland and Jönköping. Of the disease cases, 72 percent are women, the average age is 41 years and 79 percent are in the age group 21-60 years. Based on the available data, the latest case of the disease contracted on January 3 (see figure). Typing of a selection of samples shows that 13 out of 18 belong to the same type of Cryptosporidium, which indicates that the disease cases have a common source of infection.
Affected infection control units, the Swedish Food Agency and the Public Health Agency are investigating the outbreak to identify the source of infection, which is suspected to be fresh food. Information about what the outbreak cases have eaten before becoming ill is done via interviews and the collection of questionnaires. The answers are then compared to what people in a healthy comparison group indicate that they have eaten to assess whether there are foods that the outbreak cases have eaten to a greater extent than the comparison group.
FoodWorld 