Separate unidentified-source Listeria outbreak rises to 44 cases
FDA investigation 1417 lists 44 Listeria illnesses, up from 40 at first posting. The product is not identified. A traceback has been initiated, and the investigation is active and ongoing. This is a different investigation from the 11-case Listeria outbreak, FDA ref #1415. The two counts should not be combined. Confidence is high that FDA posted this investigation and this count, and low on source attribution because no food or brand is named. FDA has not identified a product, so there is no product-specific consumer action in the source.
- Location
- United States · national investigation, product unidentified
- National representative point
- First seen
- September 23, 2026
- Last verified
- October 2, 2026
- Event date
- First posted September 23, 2026; count update September 30
- Authority published
- September 23, 2026
- Authority updated
- September 30, 2026
- TiPH published
- October 1, 2026
- Desk publication, not the event date
Markers use representative points at the country or regional level, not exact incident locations. Placement indicates the affected area, not a precise site.
What changed since the prior scan
Added October 1. New to the desk. Separate from FDA ref #1415.
History
- First seen (source)
First reported by the primary source. External event date, not a TiPH publication date.
- Added to the desk
Added from FDA CORE ref #1417. Count rose from 40 to 44. Product not identified. Separate from ref #1415.
Primary sources
Who works on this?
Events like this are answered by teams across public health. These are real profession types that respond to this kind of event — not people assigned to it.
Foodborne-disease epidemiologist
Investigates contaminated-food and waterborne illness clusters.
Environmental health specialist
Inspects and mitigates environmental hazards to health.
Food safety inspector
Checks food production and supply chains for contamination risk.
Public health microbiologist
Identifies pathogens and characterizes outbreaks in the lab.
Outbreak investigator
Coordinates case-finding, interviews, and source tracing.
Public health is happening everywhere. Send this signal.
Corrections & updates
This record is reverified against its primary sources on a twice-daily scan. When the evidence changes, the record changes and the change is logged in the review record — including signals we remove. This is situational awareness, not clinical or travel advice.
Related signals
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- SignificantBroccoli sprouts linked to a Salmonella Bovismorbificans outbreak in six statesUnited States · sold in Idaho, Montana, and Washington; may have moved farther
- SignificantFDA opens traceback into a new 11-case Listeria outbreak with no product identifiedUnited States · national investigation, product unidentified