Enoki Mushroom and Listeria Outbreak - An Overview

What Is Enoki Mushroom and Listeria Outbreak?

Enoki mushrooms are edible white with long and slender stems, often sold in bunches with the roots sealed in plastic packaging. They are most commonly found in Japan, China, and Korea. They are cooked in various dishes, such as soups, hot pots, and stir-fried dishes.

Epidemiological and sample data collected from the sick people on October 5, 2020, confirmed the primary cause of sickness as enoki mushrooms contaminated with listeria. According to the survey conducted by Fox 17, the infected individuals claimed to have consumed enoki mushrooms at restaurants with enoki mushrooms on the menu.

Research has been ongoing to identify the specific variety of mushrooms typically used in Asian dishes, such as soups, hot pots, and stir-fried dishes, and may be associated with the illness caused. In 2020, the CDC investigated the first known outbreak of Listeria in the United States of America linked to enoki mushrooms, which resulted in the recall of enoki mushrooms imported from Korea.

Since then, the U.S. Food and Drug Administration (FDA) and public health officials have started collecting many samples of enoki mushrooms, and Listeria found in them, which has led to more than 20 recalls of enoki mushrooms.

What Are the Symptoms of Listeria Infection Due to Enoki Mushrooms?

The symptoms of listeria infection seen in pregnant people are usually mild. However, the symptoms seen in non-pregnant people are very severe.

The symptoms of listeria infection due to enoki mushrooms seen in both pregnant and non-pregnant people are as follows:

Pregnant People:

• Fever.

• Tiredness.

• Muscle aches.

• Serious illness in newborn babies.

• Miscarriage.

• Premature delivery.

Non-pregnant People:

• Fever.

• Headache.

• Confused state of mind.

• Loss of balance.

• Stiff neck.

• Seizures.

• Muscle aches.

• Fatigue.

• Diarrhea.

• Vomiting.

How to Diagnose Listeria Infection?

A laboratory test or bacterial culture usually diagnoses a Listeria infection. This is done by taking body tissues or fluids like spinal fluid, placenta, or blood.

What Are the Precautions for People at High Risk?

The following precautions have to be taken before having enoki mushrooms:

• Pregnant women, older people aged above 65, and people with low immunity should avoid eating enoki mushrooms.

• Avoid eating contaminated and recalled mushrooms. Throw them away or return them to the store.

• Cook the enoki mushrooms thoroughly; do not eat them raw.

• Listeria growth is possible even if the enoki mushrooms are stored in the refrigerator, but heating foods can kill them at high temperatures.

• Wash hands thoroughly after eating or handling enoki mushrooms.

• Clean the surfaces, utensils, and refrigerator where the raw enoki mushrooms came into contact.

• Keep the raw enoki mushrooms away from other foods.

What Are the Precautions That Everyone Should Take?

The following precautions have to be taken by everyone before eating enoki mushrooms:

• Wash hands thoroughly after eating or handling enoki mushrooms.

• Clean the surfaces, utensils, and refrigerator where the raw enoki mushrooms came into contact.

• Keep the raw enoki mushrooms away from other foods.

• Throw the contaminated or recalled mushrooms away and avoid eating them.

• Make sure to thoroughly clean the refrigerator, utensils, and surfaces that come into contact with raw enoki mushrooms, as there are high chances of raw enoki developing strains of Listeria.

What Are the Precautions That Should Be Taken by Restaurants?

The following precautions have to be taken by the restaurants:

• The enoki mushrooms should be cooked thoroughly.

• Avoid serving raw enoki mushrooms as garnish. They should not be added to the dishes just before serving, as they may not reach enough temperature to kill Listeria.

• Do not use recalled or contaminated enoki mushrooms.

• Keep raw enoki mushrooms away from other foods that are not being cooked.

• Restaurant employees should wash their hands thoroughly after handling the raw enoki mushrooms.

• Follow the rules and regulations recommended by the FDA about safely handling and cleaning enoki mushrooms.

What Are the Precautions to Be Taken by Grocery Stores?

One should not sell recalled or contaminated enoki mushrooms.

What Is Listeria Outbreak?

Listeria outbreaks are harmful, especially in pregnant women, older people over 65, and people with poor immune systems. This happens because Listeria can spread beyond the gut to various other body parts, leading to invasive listeriosis.

In pregnant women, Listeria may lead to premature delivery of a baby or loss of pregnancy. In older people or people with poor immune systems, there are chances of hospitalization, which sometimes may lead to death. Symptoms generally start from one to four weeks after the consumption of contaminated enoki mushrooms or sometimes on the same day after eating enoki mushrooms.

Who Is at the Highest Risk/Complications of Listeria Outbreak?

The following are at greater risk of Listeria caused by enoki mushrooms:

• Pregnant women.

• Older people above 65 years of age.

• Immunocompromised people.

• There are high chances of pregnancy loss or premature delivery.

• Listeria outbreaks caused by enoki mushrooms can also cause severe illness or death in newborns.

Conclusion:

Enoki mushrooms are well-linked to the Listeria outbreak. The listeria outbreak due to enoki mushrooms is due to eating contaminated or recalled mushrooms, eating raw mushrooms, eating without improper cooking, or not following the guidelines given by the FDA. A listeria outbreak is more severe or causes serious illness in pregnant women, older people, and people with poor immunity. It is always essential to follow the rules and guidelines given by the higher authorities on how to safely handle and cook enoki mushrooms, as it may sometimes lead to the death of an individual.