A large outbreak of multiple Salmonella serovars linked to alfalfa sprouts in Norway, October to December 2024.

ABSTRACT:

Purpose

This study investigates a nationwide Salmonella outbreak in Norway during October-December 2024 involving four different serovars-S. Newport, S. Typhimurium, S. Kisarawe, and S. Kinondoni. The investigation aimed to assess the outbreak's scope, identify the source, and implement control measures.

Methods

Epidemiological analyses included trawling and targeted questionnaires, a matched case-control study, and grocery receipt analysis. Whole-genome sequencing (WGS) determined genetic links between Salmonella isolates from human cases, food, and environmental samples. Traceback investigations identified potential contamination sources.

Results

A total of 230 cases (69% female, median age: 48 years) were identified, with 33% requiring hospitalization. Sprout consu

SUBMITTER: Rakover A 

PROVIDER: S-EPMC12460573 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature