Switzerland: Salmonellosis in 2022
In 2022, 1,843 cases of salmonellosis confirmed by laboratory diagnostics were reported. This corresponds to a reporting rate of 21 new cases per 100,000 inhabitants. The number of cases has increased compared to previous years. The typically seasonal increase in reports during the summer and autumn months was also observed in 2022. The most commonly reported serovars remained S. Enteritidis (39%), followed by S. Typhimurium (16%) and the monophasic S. Typhimurium (1,4,[5],12,i:-) variant (11%).
Salmonella infection in poultry: The occurrence of Salmonella in poultry should be minimized to reduce the risk of human infection through poultry meat and eggs. To achieve this, control targets have been set, aiming for less than 1% prevalence in breeding and fattening animals and less than 2% prevalence in laying hens.
These targets focus on the serovars that pose the greatest threats to human health, namely S. Enteritidis, S. Typhimurium, the monophasic S. Typhimurium (1,4,[5],12,i:-) variant, as well as S. Virchow, S. Hadar, and S. Infantis in breeding herds. If these serovars are detected during the surveillance of poultry samples, control measures are implemented. Epidemic cases are registered and reported in the InfoSM and subsequently published.
