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Sweden reported 16 Salmonella Napoli illnesses, with interviews and purchase records pointing to arugula bought from one supermarket chain and traced to Italy. The suspected batch was not tested because no product remained, so the source has not been confirmed by testing.
Sixteen people in Sweden became ill in a Salmonella Napoli outbreak that authorities suspect was linked to arugula from Italy, according to a report published October 7. Interviews and an investigation of an empty package pointed to the same supermarket chain and an Italian source, but the suspected batch was unavailable for testing, leaving the link unconfirmed by product analysis.
The Public Health Agency of Sweden said the cases involved eight men and eight women, ranging in age from under 1 to 84. The median age was 57. Illness onset dates for the main group ran from August 17 through September 6. The report described a couple of later-onset cases as possible secondary cases or cases without gastrointestinal symptoms.
Of 12 patients interviewed or responding to questionnaires, 11 said they had bought arugula from the same supermarket chain. The remaining person reported buying a salad mix containing arugula from that chain. The purchases were made within a relatively short period, according to the report.
One patient had kept the empty arugula bag at home, intending to recycle it. The Swedish Food Agency used information from the package in a trace-back investigation that led to Italy. However, officials could not sample the implicated batch because no product was left. The available evidence points to a possible source, but does not establish that the arugula carried the bacteria.
Why the Arugula Link Matters
The investigation matters because it connects a cluster of infections to a specific food type and retail channel, giving public health and food safety officials a lead for tracing how the product moved through supply chains. Produce can be eaten without cooking, so identifying a possible contaminated item can inform investigations and help authorities assess whether further action is needed.
At this stage, however, the evidence is based on patients’ accounts and package traceability, not a positive test from the suspected arugula. Readers should distinguish the suspected connection from a confirmed finding: the report does not say that officials identified a contaminated product still on sale or announced a recall in connection with these cases.
The outbreak also involves Salmonella Napoli, described in the report as an uncommon serotype in Sweden. The country recorded eight reported cases of this serotype in 2025. That figure gives limited context for its rarity, but it does not establish a direct comparison between the 2025 cases and this outbreak.
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How Investigators Traced the Produce
The investigation combined patient interviews with information recovered from a household package. Eleven of the 12 people who provided information reported buying arugula from the same supermarket chain; the other person bought a salad mix that also contained arugula. This pattern helped direct attention toward a shared product, though purchase histories alone cannot prove where or how contamination occurred.
The empty package supplied traceability information that led the Swedish Food Agency to Italy. The trace-back could not be followed by laboratory testing of the batch, because the product had already been used or discarded. The report does not identify a farm, supplier, product brand, or precise distribution dates.
The source report also covered a separate food safety matter in Uppsala: meal deliveries to home-care recipients resumed after a Listeria finding. Testing indicated contamination was limited to seven containers of bean stew; other samples from the kitchen and other dishes passed inspection. That incident is distinct from the Salmonella investigation and is not evidence about the arugula cases.
“The 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, as reported by Food Safety News
What Testing Could Not Confirm
The source of the infections has not been confirmed through testing of the suspected arugula. The batch was unavailable, and the report does not say that a different sample tested positive. It is also unclear whether any further product was available for investigation, whether authorities identified a particular producer or shipment, or whether a recall or other consumer notice was issued.
The report gives onset dates for the main cases but does not provide a full account of each patient’s symptoms, hospitalizations, or current condition. It also does not specify whether every reported case was confirmed by laboratory testing. The later-onset cases are described as possible secondary cases or as people without gastrointestinal symptoms, so their relationship to the main cluster is not settled in the report.
Further Trace-Back and Case Review
Swedish health and food safety authorities can continue reviewing case interviews, purchase information, and supply-chain records to assess whether the arugula remains the most plausible source and whether other cases are connected. The report does not provide a schedule for further updates or describe a planned public announcement.
Any additional findings, such as new linked cases, a product sample, or identification of a supplier, could clarify the suspected connection. Until such information is reported, the established account is that 16 illnesses were identified, patient purchase histories converged on arugula from one chain, and traceability led to Italy—but the suspected batch was not tested.
Key Questions
How many people were sick in the Sweden Salmonella outbreak?
The report describes 16 people with Salmonella Napoli illnesses. The main group included eight men and eight women, from under 1 to 84 years old.
What food was suspected as the source?
Authorities suspected arugula from Italy. Eleven of 12 interviewed patients reported buying arugula from the same supermarket chain; the other bought a salad mix containing arugula from that chain.
Was Salmonella found in the arugula?
The report does not describe a positive test from the suspected batch. The Swedish Food Agency traced an empty package to Italy, but no product remained for sampling.
When did people become ill?
Reported onset dates for the main group fell between August 17 and September 6. The report mentions a couple of later-onset cases but says their status as secondary cases was uncertain.
Was a recall reported for the suspected arugula?
The source report does not say that a recall was issued in connection with the Salmonella cases. It reports a trace-back to Italy, while leaving the suspected product batch untested.
Source: rss
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