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Created by
user-9b773, last updated by Brad Yang on Jun 16, 2025
2 minute read
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 | US: multistate | Black fungus1 | Other food product / mixed |
| 2023 | Germany | Dried Mu-Err mushrooms from Vietnam, via Czech Republic | Other food product / mixed |
| 2021 | US: multistate | Frozen pre-cooked shrimp2 | Crustaceans and products thereof |
| 2019 | Australia | Frozen microwave meals3 | Other food product / mixed |
1 Multiple Salmonella serovars including Salmonella Javiana, Mgulani and Weltevreden were found. AH USA Group Inc. issued a recall of its Black Fungus (Nam Meo) product.
2 This recall was caused by a multistate outbreak described above. Avanti Frozen Foods of India expanded its voluntary recall of frozen cooked shrimp on August 13, 2021. The expansion now includes products imported into US from November 2020 through May 2021.
3 This recall was caused by a multistate outbreak described above. Core Ingredients issued a recall for eight frozen pre-prepared meals with best-before dates ranging from March 5, 2020, to October 4, 2020.
Relevant links:
- https://webgate.ec.europa.eu/rasff-window/screen/notification/688257
- https://www.foodsafetynews.com/2023/05/black-fungus-recalled-in-12-states-after-testing-finds-multiple-strains-of-salmonella/
- https://webgate.ec.europa.eu/rasff-window/screen/notification/597121
- https://www.fda.gov/food/outbreaks-foodborne-illness/outbreak-investigation-salmonella-weltevreden-frozen-pre-cooked-shrimp-april-2021#:~:text=CDC%20declares%20outbreak%20over.&text=The%20FDA%2C%20along%20with%20CDC,that%20the%20outbreak%20is%20over.
- https://www.foodsafetynews.com/2019/10/almost-50-ill-in-australian-salmonella-outbreak/
- https://webgate.ec.europa.eu/rasff-window/portal/index.cfm?event=notificationDetail&NOTIF_REFERENCE=2016.1350
- http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0134252
- http://www.foodsafetynews.com/2015/08/cdc-investigation-into-outbreak-linked-to-recalled-frozen-tuna-is-over/#.WAPQuXoSPIY
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4418162/
- http://www.eurosurveillance.org/ViewArticle.aspx?ArticleId=18949