Yersinia pseudotuberculosis Outbreak Linked to Carrots in Finland
Author Information
Author(s): Kangas Susanna, Takkinen Johanna, Hakkinen Marjaana, Nakari Ulla-Maija, Johansson Tuula, Henttonen Heikki, Virtaluoto Laura, Siitonen Anja, Ollgren Jukka, Kuusi Markku
Primary Institution: Helsinki University, Helsinki, Finland
Hypothesis
What is the source of the Yersinia pseudotuberculosis outbreak among schoolchildren in Finland?
Conclusion
The outbreak was caused by carrots contaminated at the production farm.
Supporting Evidence
- Y. pseudotuberculosis was isolated from stool samples of 5 persons among the 53 case respondents.
- A case-control study showed that the carrot-white cabbage mixture was associated with illness.
- Carrots served in the school were traced back to only 2 farms.
- Microbiological examination identified Y. pseudotuberculosis in environmental samples from the processing plant.
Takeaway
Some kids got sick from eating carrots that had germs on them from the farm.
Methodology
Epidemiologic, microbiologic, trace-back, and environmental investigations were conducted, including surveys and case-control studies.
Limitations
The association between shrews and carrots is uncertain.
Participant Demographics
Schoolchildren aged 7-18 years and school personnel.
Digital Object Identifier (DOI)
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