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

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.

Outbreaks: Outbreaks linked to S. Weltevreden have been detected:

Year

Location

Associated source

Number of cases

2015US-multistatefrozen tuna1
2010Indiaunknown8 identified (~150 sick)
2007Franceunknown2 confirmed (26 sick)
2007Europe-multinationalalfalfa sprouts29


Relevant links:

  1. https://webgate.ec.europa.eu/rasff-window/portal/index.cfm?event=notificationDetail&NOTIF_REFERENCE=2016.1350
  2. http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0134252
  3. http://www.foodsafetynews.com/2015/08/cdc-investigation-into-outbreak-linked-to-recalled-frozen-tuna-is-over/#.WAPQuXoSPIY
  4. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4418162/
  5. http://www.eurosurveillance.org/ViewArticle.aspx?ArticleId=18949
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