USA – Outbreak Investigation of Listeria monocytogenes: Enoki Mushrooms (November 2022)


FDA, along with CDC and state and local partners, is investigating an outbreak of Listeria monocytogenes infections linked to enoki mushrooms. FDA has identified enoki mushrooms distributed by Utopia Foods, Inc. of Glendale, New York and imported from China, and enoki mushrooms labeled as “Producer: Shandong Youhe Biotechnology, Co.,” with an address in China and “Distributed By: Sun Hong Foods, Inc.” as likely sources of illnesses in this outbreak. Enoki mushrooms are long thin white mushrooms, usually sold in clusters. They are especially popular in East Asian cuisine and are also known as enokitake, golden needle, futu, seafood, or lily mushrooms.

As of January 18, 2022, CDC reports three illnesses included in this outbreak. Through ongoing import and product sampling of enoki mushrooms, two strains of Listeria monocytogenes detected on enoki mushroom products have been determined through Whole Genome Sequencing (WGS) to be the same strains of Listeria monocytogenes linked to illnesses in this outbreak. Both strains are included in this outbreak investigation.

On January 17, 2023, FDA reported a positive import sample of enoki mushrooms that matched both outbreak strains and resulted in a voluntary recall expansion from Utopia Foods, Inc. Additional sample collection and analysis conducted by the Maryland Department of Health have also identified both outbreak strains of Listeria monocytogenes in two product samples of enoki mushrooms. These products that tested positive are sold in a 7.05-oz (200g) clear plastic package with a brown and green label and include a label on the back of the package that states: “Producer: Shandong Youhe Biotechnology Co.,” with an address in China, and “Distributed By: Sun Hong Foods, Inc.”

On December 17, 2022, FDA issued a safety alert for enoki mushrooms labeled as “Producer: Shandong Youhe Biotechnology, Co.,” with an address in China and “Distributed By: Sun Hong Foods, Inc.,” as a result of a positive product sample collected by Missouri state partners. At that time, these products were not linked to an active outbreak. The strain of Listeria found in these products matches one of the two strains linked to illnesses in this outbreak. FDA’s safety alert has been updated with the most recent information linking these products to an ongoing outbreak investigation.

FDA’s investigation is ongoing to determine a potential source of contamination and whether any other products are contaminated or linked to illnesses. Additional information will be provided as it becomes available.


Consumers, restaurants, and retailers should not eat, sell, or serve recalled enoki mushrooms from Utopia Foods, Inc. and enoki mushrooms labeled as “Producer: Shandong Youhe Biotechnology, Co.,” with an address in China and “Distributed By: Sun Hong Foods, Inc.” Consumers should check the label on both the front and the back of their enoki mushroom package to view distributor information (see photos below).

Listeria is especially harmful if you are pregnant, aged 65 or older, or have a weakened immune system due to certain medical conditions or treatments. If you are in any of these groups, do not eat any raw enoki mushrooms. For enoki mushrooms that are not recalled or potentially contaminated, always cook enoki mushrooms thoroughly to kill any foodborne germs.

Call your healthcare provider right away if you have any of these symptoms after eating enoki mushrooms:

  • 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. However, Listeria can cause pregnancy loss or premature birth. It can also cause serious illness or death in newborns.

Follow FDA’s safe handling and cleaning advice and use extra vigilance in cleaning and sanitizing any surfaces and containers that may have come in contact with these recalled products to reduce the risk of cross-contamination, including retailers who stored or repackaged recalled enoki mushrooms. Listeria can survive in refrigerated temperatures and can easily spread to other foods and surfaces.

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 )

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