Reporting of Salmonellosis Markedly Declined in Finland During 28 Years of Surveillance, 1995–2022
2025
Kristiina Suominen | Jukka Ollgren | Elina Leinonen | Ruska Rimhanen-Finne
Salmonellosis is the second most common foodborne bacterial gastroenteritis in humans in Finland and worldwide. In Finland, a national salmonella control program covering cattle, pigs, and poultry, as well as the meat and eggs obtained from them, has been in place since the country joined the EU in 1995. To identify trends in the incidence of salmonellosis and to reflect on their causes, we analyzed Salmonella case data from the Finnish Infectious Disease Register (FIDR) from 1995 to 2022 and outbreak data from the national food and waterborne outbreak register (the FWO register) in the period 2010&ndash:2022. From 1995&ndash:1999 to 2015&ndash:2019, the incidence of salmonellosis decreased by 66% and 63% for domestic and travel-related cases, respectively. Most salmonellosis cases (72%) were travel-related, and, of them, 27% were infected in Southeast Asia. The most common serovars were S. Typhimurium and S. Enteritidis (38% and 19% of domestic cases, and 7% and 39% of travel-related cases). During 2010&ndash:2022, Salmonella sp. was reported as a cause in 31 foodborne outbreaks. In 14 of them, the source was identified at foodstuff level, and 12 sources were of foreign origin. The results of this study indicate that the national salmonella control program may have prevented domestic human infections in Finland.
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