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Listeriosis outbreak in Western Washington - Unknown source
2 years ago •source doh.wa.gov
United States
The Washington State Department of Health, Tacoma-Pierce County Health Department and Thurston County Public Health and Social Services are investigating a Listeria monocytogenes (listeriosis) outbreak in Western Washington. To date, 5 adults over 60 years of age infected with Listeria monocytogenes have been reported from 2 Counties: Pierce (4) and Thurston(1). All 5 had compromised immune systems, were hospitalized and unfortunately, 3 have died. Genetic fingerprinting results (whole genome sequencing) indicate they likely have the same source of infection. Patients became ill between February 27 and June 30, 2023.To date, a common food source has not been identified but the investigation is ongoing.
Listeria bacteria are found in the environment and can spread from contaminated food to surfaces. Listeria can grow on foods kept in the refrigerator for several days. The bacteria are easily killed by heating food to a high temperature (165°F).
Symptoms usually start within 2 weeks after eating food contaminated with Listeria monocytogenes but may start as early as the same day or as late as 10 weeks after exposure. People who are not pregnant usually have fever, muscle aches, and tiredness. They may also get a headache, stiff neck, confusion, loss of balance, or seizures. Pregnant people usually have fever, muscle aches, and tiredness.
In case you are experiencing Listeria monocytogenes symptoms, it is important to report it. It can help to detect & resolve outbreaks early and prevent others from being harmed, and it enables better surveillance. If symptoms persist, seek medical care.
Source: doh.wa.gov/you-and-your-family/illness-and-disease-z/foodborne-illness/outbreaks/2023-listeriosis-unknown-source
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