Salmonella Weltevreden

Background: Salmonella enterica subsp. enterica serovar Weltevreden (antigenic formula 3,{10}{15}:r:z6) is a serovar of the O:3,10 (E₁) serogroup.

Genetic characteristics:

Animal reservoir: Animal reservoirs for S. Weltevreden have not been definitively identified, but seafood (e.g., fish and shrimp) have been implicated.

Geographical distribution: S. Weltevreden has been found in Southeast Asian meat, vegetables and seafood, and in the United States from imported tuna from Indonesia, as well as in the United Kingdom from betel leaves imported from Malaysia. Alfalfa sprouts have also been implicated in other European outbreaks. Gastroenteritis associated with S. Weltevreden has been reported in the US, Europe and India.

Human outbreaks:

Year	Location	Associated source	Number of cases
2015	US-multistate	frozen tuna	1
2010	India	unknown	8 identified (~150 sick)
2007	France	unknown	2 confirmed (26 sick)
2007	Europe-multinational	alfalfa sprouts	29

Border rejections: There have been no recent border rejections linked to this serovar.

Recalls:

Year	Location	Recalled product	Type
2024	Finland	Turmeric powder from India	Herbs and spices
2023	Germany	Dried Mu-Err mushrooms from Vietnam, via Czech Republic	Other food product / mixed
2021

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Salmonella Weltevreden