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Sweden reported 16 Salmonella Napoli illnesses, with interviews and purchase records pointing to arugula bought from the same supermarket chain and a package trace leading to Italy. The suspected batch was not available for testing, so the source has not been confirmed. Separately, meal deliveries in Uppsala have resumed after Listeria was found in seven containers of bean stew.
Sixteen people in Sweden were sickened in a Salmonella Napoli outbreak that authorities suspect was linked to arugula from Italy, according to the Public Health Agency of Sweden. Investigators connected the illnesses to purchases from one supermarket chain, but the suspected batch was no longer available for testing, leaving the source unconfirmed.
The cases involved eight men and eight women, ranging in age from under 1 to 84 years; the median age was 57. Reported illness onsets fell between August 17 and September 6. The agency also noted a couple of later-onset cases that may have been secondary infections or may not have involved gastrointestinal symptoms.
Investigators interviewed or received questionnaire responses from 12 people. Eleven said they had bought arugula from the same supermarket chain; the remaining person had bought a salad mix containing arugula from that chain. The purchases took place over a relatively short period, according to the report.
A consumer had kept an empty arugula bag at home, planning to put it in plastic recycling. That packaging information enabled the Swedish Food Agency to trace the product back to Italy. The batch itself was not sampled because no product remained. The investigation therefore found a traceability link, but did not establish through product testing that the arugula carried Salmonella.
Why the Arugula Link Matters
The investigation points to a possible shared food exposure among people with the same unusual Salmonella serotype. Purchase histories and packaging can help investigators identify a common product even when the food has already been eaten or discarded. In this case, a retained package gave officials a route to trace the suspected produce across borders.
At the same time, the unavailable batch limits what can be concluded. There is no reported test result from the implicated arugula, and the source is described as suspected rather than confirmed. For consumers, the report establishes an outbreak investigation and a possible product connection, but does not identify a specific batch or provide a current recall notice.
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A Rare Salmonella Napoli Finding
Salmonella Napoli is not commonly reported in Sweden. The source report says the country recorded eight cases of this serotype in 2025, giving the current cluster added public-health relevance. That figure is a count for the prior year, not a direct measure of how much more common the infection is during this outbreak.
The same October 7 report also covered a separate food-safety issue in Uppsala. On September 30, pre-packed meals supplied to about 400 home-care users were recalled as a precaution after Listeria was detected at the municipality’s food supplier. Testing later found contamination limited to seven containers of bean stew; other samples from the kitchen and other dishes passed inspection. Production and meal deliveries have since resumed, and Uppsala’s infection control unit said there was no confirmed link to illness and assessed the risk of anyone becoming ill as very low. This Listeria event is separate from the Salmonella outbreak.
“The 16 patients were eight men and eight women, ranging in age from less than 1 to 84, with a median age of 57.”
— Public Health Agency of Sweden
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What Testing Could Not Confirm
The central unanswered question is whether the suspected arugula batch actually contained Salmonella Napoli. No remaining product was available for sampling, and the report provides no laboratory result from the food itself. The trace-back to Italy identifies the origin of the package, but it does not by itself prove the cause of the infections.
The report also does not name the supermarket chain, identify a specific product batch or give details of any recall connected to the arugula. It says 12 people were interviewed or responded to questionnaires, so the stated purchase pattern reflects those respondents rather than all 16 cases. The roles of the later-onset cases remain uncertain as well: they may have been secondary infections or may not have had gastrointestinal symptoms.
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Further Outbreak Follow-Up
The Swedish agencies’ investigation has traced a package and gathered purchase histories, but the source material does not describe a confirmed food test or announce a specific next milestone. Further information would be needed to determine whether authorities identified a supplier, batch or additional cases. The suspected product link should remain qualified unless evidence confirms it.
For the separate Uppsala incident, the municipality and supplier said they would follow up on the event together. Meal deliveries have resumed, while the reported inspection results limit the detected Listeria contamination to seven bean-stew containers. The report does not state that any illnesses were linked to those meals.
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Key Questions
How many people were sickened in the Swedish Salmonella outbreak?
Sixteen people were reported ill with Salmonella Napoli. They were eight men and eight women, ranging from under 1 to 84 years old.
Was arugula confirmed as the source?
No. Investigators suspected arugula based on purchase information and traced a retained package to Italy, but the suspected batch was unavailable for testing. The report does not confirm that the food carried the bacteria.
When did the Salmonella illnesses begin?
Reported onset dates for the main cases ran from August 17 to September 6. A couple of later-onset cases may have been secondary cases or may not have involved gastrointestinal symptoms.
What happened with the Listeria issue in Uppsala?
After Listeria was detected at a meal supplier, pre-packed meals for about 400 home-care users were recalled as a precaution on September 30. Testing found contamination in seven containers of bean stew; deliveries have resumed, and officials reported no confirmed illness link.
Source: rss
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