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Outbreak
Salmonella Typhimurium Outbreak in Denmark Affects 45 People
3 weeks ago •source ssi.dk
Denmark
Since November 8, 2025, an outbreak of Salmonella Typhimurium sequence type 19 has been reported in Denmark, with 45 individuals falling ill. The Statens Serum Institut, in collaboration with the Danish Veterinary and Food Administration and the National Food Institute DTU, is investigating the outbreak, which has yet to be traced to a specific source.The outbreak has affected 24 women and 21 men, ranging in age from 7 to 88 years, with a median age of 29. Cases have been reported across the country, with the highest numbers in Central Jutland (16 cases) and the capital region (9 cases). Other affected regions include North Jutland (8 cases), Zealand (7 cases), and Southern Denmark (5 cases). The Central Outbreak Group is conducting whole-genome sequencing and patient interviews to identify the source of the infection.
The outbreak was identified through whole-genome sequencing of bacterial isolates from patients, revealing a close genetic relationship among the strains, all belonging to sequence type 19. The Statens Serum Institut has been at the forefront of this investigation, working to uncover the source of the outbreak and prevent
Source: www.ssi.dk/sygdomme-beredskab-og-forskning/sygdomsudbrud/2025_salmonella_typhimurium
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