Research – Listeria (Sweden 2022-2023)

Posted on July 26, 2023 by | Leave a comment

Folkhalsomyndigheten

Cases where people have contracted listeria infection are now being investigated by the Public Health Agency in collaboration with the regional infection control units and the Swedish Food Agency.

From the end of May to the beginning of July, ten people have contracted listeria infection caused by the same variant of listeria, serotype IIa. Another four people fell ill in the fall of 2022 with the same strain of bacteria. The cases consist of ten men and four women and are aged 63 to 93 years. They have been reported from eight of the country’s regions. According to the information reported to the Public Health Authority, three of the patients in the oldest age group have died in close connection with their listeria infection.

The people we know who have become ill have had to answer a questionnaire about the foods they have eaten. Many have indicated that they ate cold-smoked and/or smoked salmon, but the exact product that caused the outbreak is not clear.

Risk groups for getting serious illness from listeria are pregnant women, the elderly and people with a weakened immune system.

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