USA – Outbreak of Salmonella Stanley Infections Linked to Wood Ear Mushrooms


Recalls and Advice to Restaurants and Consumer


At A Glance
Peaches in a bag.

Do not eat, sell, or serve recalledexternal icon dried wood ear mushrooms distributed from Wismettac Asian Foods, Inc. These mushrooms were sold only to restaurants and not directly to consumers.

Consumers can ask restaurants where mushrooms are from before ordering to avoid eating recalled mushrooms. Wood ear mushrooms are also commonly referred to as Kikurage, Dried Black Fungus, Dried Fungus, or Mu’er/Mu Er/Mu-Err.

  • Restaurant employees should check for recalled dried mushrooms and not serve or sell them. If you can’t tell where your dried mushrooms are from, throw them away.
  • Mushrooms were distributed to restaurants in six packs of five-pound bags labeled as Shirakiku brand Black Fungus (Kikurage) with Universal Product Code (UPC) bar code 00074410604305, item #60403, imported from China.
  • Clean and sanitizeexternal icon all surfaces that recalled mushrooms have come in contact with, including cutting boards, countertops, utensils, and storage bins.
  • In general, dried mushrooms should always be reconstituted using boiling water to kill any pathogens. This advice does not apply to recalled mushrooms, which should be thrown away.

Take action if you have symptoms of a Salmonella infection:

  • Talk to your healthcare provider.
  • Write down what you ate in the week before you started to get sick.
  • Report your illness to the health department.
  • Assist public health investigators by answering questions about your illness.
  • Most people infected with Salmonella develop diarrhea, fever, and stomach cramps 6 hours to 6 days after being exposed to the bacteria.
  • The illness usually lasts 4 to 7 days, and most people recover without treatment.
  • In some people, the illness may be so severe that the patient needs to be hospitalized. Salmonella infection may spread from the intestines to the bloodstream and then to other places in the body.
  • Children younger than 5 years, adults 65 years and older, and people with weakened immune systems are more likely to have a severe illness.
  • For more information, see Symptoms of Salmonella Infection.
Latest Outbreak Information
  • 41 people infected with the outbreak strain of Salmonella Stanley have been reported from 10 states.
    • 4 hospitalizations have been reported. No deaths have been reported.
  • Epidemiologic and traceback information show that wood ear mushrooms distributed by Wismettac Asian Foods, Inc., are the likely source of this outbreak.
    • 4 illness clusters were identified at restaurants serving ramen in three states.
    • 8 of 9 ill people linked to restaurant clusters reported eating wood ear mushrooms or ramen containing wood ear mushrooms before becoming sick.
    • Information from restaurants where ill people ate showed that wood ear mushrooms came from Wismettac Asian Foods, Inc.
  • On September 23, 2020, Wismettac Asian Foods, Inc., recalledexternal icon all Shirakiku brand imported Black Fungus that was distributed to restaurants because it may be contaminated with Salmonella.
  • This investigation is ongoing. CDC will provide more information as it becomes available.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s