More than 30 people have been confirmed sick in Sweden with Salmonella infections since early October.
The national monophasic Salmonella Typhimurium outbreak has affected 33 people. Whole genome sequencing has shown that patients have the same strain of Salmonella Typhimurium, so are suspected of having been infected by a common source of infection.
Affected local infection control units, the Swedish Food Agency (Livsmedelsverket) and the Public Health Agency of Sweden (Folkhälsomyndigheten) are investigating the outbreak.
The source of infection has not been found but is believed to be a food with a wide distribution in Sweden.
Cases range in age from 2 to 89 years old with a median age of 29. They live in seven different regions of Sweden.
Sixteen people younger than age18 and 13 more older than 60 have been infected. Women make up 21 cases and 12 men are ill.
Monophasic Salmonella Typhimurium was in the top three for the causes of Salmonella patients infected in Sweden in 2020.