Investigations into several past outbreaks were discussed at a recent event on infectious diseases. Presentations at the European Scientific Conference on Applied Infectious Disease Epidemiology (ESCAIDE) covered Salmonella, Listeria, Clostridium Perfringens, and botulism outbreaks. ESCAIDE was held in November in Stockholm, Sweden, and remotely. It was organized by the European Centre for Disease Prevention and Control (ECDC). In October 2021, the Public Health Agency of Sweden (Folkhälsomyndigheten) detected a nationwide outbreak of people infected with identical monophasic Salmonella Typhimurium strains. Forty illnesses with onset during October were reported from eight regions with an age range of 5 to 70 years old. More women than men were sick. One region reported a cluster of nine cases linked to a preschool. In a case-case study, researchers compared exposures of 24 outbreak patients to 47 other salmonellosis patients, reported during mid-September-November 2019 to 20...