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

NCBI PD link for serovar Weltevreden: https://www.ncbi.nlm.nih.gov/pathogens/isolates/#(taxgroup_name:%22Salmonella%20enterica%22)%20AND%20computed_types:(%22serotype=Weltevreden%22)

Genetic characteristics: 

...

Geographical distribution: Serovar Weltevreden has been found worldwide. 

Human outbreaks: 

Year

Location

Associated source

Number of cases

2021US: multistateFrozen pre-cooked shrimp9
2019AustraliaFrozen microwave meals46
2017-2018US: multistateKratom1199
2015US: multistateFrozen tuna6512
2015OmanHummus (likely)101
2010IndiaFood comprising milk, rice, sprouted pulses and curd150 (8 confirmed)
2007FranceUnknown26
2007Europe: multinationalAlfalfa sprouts45

1 Multiple serovars including Salmonella I 4,[5],12:b:-, Heidelberg, Javiana, Okatie, Weltevreden, and Thompson were involved in this outbreak. 

2 Sixty Sixty-five individuals across 11 states were reported infected with outbreak strains, including 64 cases of Salmonella Paratyphi B variant L(+) tartrate(+) and 1 case of Salmonella Weltevreden.

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4 This recall was caused by a multi-country outbreak described above.

Relevant links:

  1. https://pmc.ncbi.nlm.nih.gov/articles/PMC9927414/


  1. https://archive.cdc.gov/www_cdc_gov/salmonella/weltevreden-06-21/index.html
  2. https://archive.cdc.gov/www_cdc_gov/salmonella/paratyphi-b-05-15/index.html
  3. https://pmc.ncbi.nlm.nih.gov/articles/PMC10961741/
  4. https://www.foodsafetynews.com/2019/10/almost-50-ill-in-australian-salmonella-outbreak/
  5. https://pmc.ncbi.nlm.nih.gov/articles/PMC8242109/
  6. https://pmc.ncbi.nlm.nih.gov/articles/PMC4418162/
  7. https://www.eurosurveillance.org/content/10.2807/ese.13.32.18949-en
  8. https://www.eurosurveillance.org/content/10.2807/esw.12.48.03321-en
  9. https://webgate.ec.europa.eu/rasff-window/screen/notification/688257
  10. https://www.foodsafetynews.com/2023/05/black-fungus-recalled-in-12-states-after-testing-finds-multiple-strains-of-salmonella/
  11. https://webgate.ec.europa.eu/rasff-window/screen/notification/597121
  12. 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.
  13. https://www.eurosurveillance.org/content/10.2807/esw.12.48.03321-en

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