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The reason 28 children from the nursery school in Sumida-ku, Tokyo showed symptoms of food poisoning was that the “dashi packet” used for food was overcooked. That possibility was pointed out and attracted attention on the Internet.
However, the Tokyo Metropolitan Bureau of Health and Welfare emphasized: “I have not understood the case where the food poisoning was caused by the dashi packet. (Overcooking the dashi packet) is just a possibility.” There is. A representative of a dashi manufacturer is confused and says, “I have never heard of food poisoning caused by dashi packets.”
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It was pointed out that it may have been caused by overcooking the dashi packet (photo is an image).
Histamine was extracted from “Dashi Pack” …
The Tokyo Metropolitan Office of Health and Welfare announced on November 16, 2020 that 28 children suffered food poisoning with rashes on their faces and arms at a daycare center in Sumida district on November 11. The cause was determined to be “Kitsune Udon”, which was cooked and served in the garden and eaten by the children.
When we tested for “histamine” causing food poisoning, we found that there were 8 milligrams and 20 milligrams left over per 100 grams of fox udon and chopped fried foods (food stored for hygiene inspections in food facilities, etc.). Less than 5 milligrams were detected in each of the “Dashi Packs”. Sumida Ward has suspended business for 6 days at the power facility that caused the problem.
This is the capital’s announcement, but when the Sankei Shimbun reported on this food addiction on the 16th, it was noticed online. According to the article, “According to the capital, the Sumida Neighborhood Public Health Center has determined that food poisoning is caused by the chemical” histamine “detected in udon fox soup. It may have been boiled longer than the prescribed cooking method and it may have been removed. ”The dashi pack maker set the simmer time at 10 minutes, while the feed cook simmered it for 45 minutes.
It was noted that “overboiled dashi packet” may have caused food poisoning, so on Twitter, “I’m usually scared”, “I’m scared of food poisoning from overboiled soup packet, but boiled for over an hour. Some people are concerned about the package itself and say, “There are times when it is on.” Yet I was wondering, “Is there a conventional warning about food addiction due to overcooking? ? “,” Why does overcooking the soup packet cause food addiction? “,” Have I been simmering it for a long time? “There were many voices. Some people were concerned about the impact on the manufacturer, saying, “I hope it doesn’t hurt the Dashi Pack rumors.”
According to the website of the Ministry of Health, Labor and Social Welfare, histamine food poisoning is an allergic food poisoning caused by eating foods in which the causative agent of histamine accumulates in high concentrations, especially “fish and fish products processed “. “Histamine is heat stable and cannot be removed during the cooking process, so once it is produced, it cannot prevent food poisoning,” he said.
As a preventive method, it is important “a constant control of the temperature from the raw material (in the case of fish, from the moment of death) to the ingestion of the final product”. Specifically, “When buying fish, do not leave it at room temperature, but leave it promptly. Let us leave it in the refrigerator.” I can’t find a warning that corresponds to “overcooking”.
“Unusual use” of the Dashi package
A person in charge of the Food Monitoring Division of the Tokyo Metropolitan Bureau of Health and Welfare told J-CAST News on the 17th: “There is no fish menu that generally causes food poisoning in this food. Therefore , fish is used as raw material in dashi package. Therefore, it was raised as one of the possible causes. I have not determined that the cause is soup broth or soup broth. ” “I have not discovered any cases of food poisoning caused by Dashi Pack so far. (Overcooking the Dashi Pack) is just one possibility,” he emphasized.
Since the amount of histamine detected as “5 milligrams out of 100 grams” in the previous ad is small enough to cause food poisoning, “I think there was no problem with the dashi package itself,” said the person in charge. . .. On the other hand, because the simmering time was longer than the manufacturer’s notation, it was “used unusually”, so “there is a possibility that the histamine originally contained in the fish may have transferred. to the soup broth. ” The ingredients in the fish are extracted, but since histamine is soluble in water, they may be extracted together. “
He also explained that “children are more sensitive than adults and can develop addiction to food even in small amounts. In fact, adults also eat this food, but adults are not addicted to food.” An experiment is being considered to see if histamine is removed by overcooking the package.
A person in charge of the Sumida Ward Living Hygiene Division, who got rid of the feeding facility, said in an interview: “It is true that histamine was detected in ‘Kitsune Udon’ and as a result, allergic symptoms occurred, so we suspended the business. ” Moving forward, he says, “we are coordinating with the Tokyo Metropolitan Government with a view to conducting demonstration experiments with commercially available dashi packages.”
“I have been offering food packages for a long time, but I have never had food poisoning.”
As noted on Twitter, it was the maker of the dashi package that had an unexpected fan. A representative of a dashi manufacturer based in the Kyushu region said in the interview: “It has been over 30 years since this company was established, but I have not heard of histamine being mined due to dashi packages for a long time. time. We also offer soup packets for lunch, but I’ve never had any food poisoning. “
It is said that he heard the news of food poisoning in the Sumida neighborhood on the morning of the 17th, and the representative was confused: “It is a nuisance to us. Please forgive me.” “I feel like the word Dashi Pack is walking alone,” he said.
“The dashi package is made by mixing katsuo and seaweed and putting it on a non-woven fabric, and the raw material is the same as dashi used in hotels and restaurants. After all, how much histamine is fish instead of the dashi pack? Not a matter of having? “
The person in charge of the Food Poisoning Damage Information Management Office of the Food Safety and Monitoring Division of the Ministry of Health, Labor and Welfare said: “I cannot say for sure because I have not identified everything, but so far , there are cases where histamine was extracted from the dashi package and food poisoning occurred. I have not confirmed this. ” Food poisoning due to histamine is said to occur frequently in facilities with many children, such as nursery schools, every year. As mentioned above, there are voices of confusion on the Internet, but the official said: “In consideration of the social impact, we also want to ask about the situation and pay close attention to the contents of the survey in the Sumida neighborhood.” ..
(Editorial Department of J-CAST News Masanori Aoki)
