Multinational investigation of a Salmonella Umbilo outbreak due to rocket salad and baby spinach in Europe, 2024

Euro Surveillance: Europe’s Journal of Infectious Disease Surveillance, epidemiology, prevention, and Control (Volume 29, November 14, 2024) published an article entitled “Multinational Investigation of a Salmonella Umbilo Outbreak Reveals Rocket Salad and Baby Spinach as the Likely Infection Vehicles, Europe, 2024.”  The authors reported on the collaborative investigation of an outbreak including about 200 cases of Salmonella enterica serotype Umbilo (S. Umbilo) that affected several European countries mainly between July and September 2024. The investigation enabled them to rapidly identify and microbiologically confirm rocket salad (also known as arugula or rucola) from a company in Italy as the likely food vehicle. Baby spinach and other items the same company produces could be additional food vehicles. While case numbers appeared to decline in October 2024, some S. Umbilo infections (with genomic analysis pending to confirm these cases) continue to be detected at the time of writing. Public health institutes in Germany, Denmark, and Austria collaborated closely in the outbreak investigation by rapidly exchanging information about results from case interviews and other investigations. Until October 18, 2024, 159 cases were reported in the three countries (118 in Germany, 22 in Denmark, 19 in Austria). @ https://www-eurosurveillance-org.translate.goog/content/10.2807/1560-7917.ES.2024.29.46.2400728?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=wapp

 

 

 Multinational investigation of a Salmonella Umbilo outbreak reveals rocket salad and baby spinach as the likely infection vehicles, Europe, 2024
Multinational investigation of a Salmonella Umbilo outbreak reveals rocket salad and baby spinach as the likely infection vehicles, Europe, 2024

A food-borne outbreak with about 200 Salmonella Umbilo cases occurred mainly between July and September 2024 in several European countries. Collaborative work between outbreak teams in Germany, Austria and Denmark, including epidemiological and microbiological investigations, allowed to rapidly identify rocket salad as the likely infection vehicle. Salmonella Umbilo was detected in rocket salad, and later in baby spinach. The food isolates and clinical outbreak strain were genetically closely related. Both food items originated from the same company in Italy.

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