Infectious Diseases 2019

Infectious Diseases 2019

Campylobacter and Salmonella in Switzerland

23 August, 2019

According to the 2018 surveillance report of zoonoses and outbreaks of food poisoning, in 2018, campylobacteriosis remained the most frequently recorded zoonosis in humans in Switzerland.  7,675 cases were confirmed by laboratory diagnosis, representing a slight increase over 7,219 cases in the previous year. The peak was reached in July and August, with 2,056 cases due to the summer grilling season and more trips abroad. A second short-term increase during the Christmas and New Year holidays was attributed to consumption of the Swiss version of Chinese fondue. Campylobacter jejuni made up 69 percent of the 5,688 cases were species information was available while Campylobacter coli was responsible for 9 percent. In self-monitoring by the poultry sector, 1,776 analyzes were done on chicken and turkey meat in 2018. Of these, 436 (24.5 percent) were found positive for Campylobacter spp. compared to 27 percent in 2017.
In 2018, 1467 laboratory-confirmed cases of salmonellosis were reported (compared to 1835 in 2017), which corresponds to 17 cases for 100,000 inhabitants. Most infections were in children aged less than 5 years old (<1 year: 51 per 100,000, 1-4 years: 53 per 100,000). The most frequently reported serovars were: S. Enteritidis (28%), followed by S. Typhimurium (16%) and the monophasic strain 4.12: i: - (12%).