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Original title: New coronaviruses are frequently detected in imported cold chains How difficult is disinfection at low temperatures?
Sterilizing food from the cold chain at low temperatures is a new problem that only emerged after the outbreak of the new crown this year.
On December 5, the Wuhan Municipal Department of Disease Control and Prevention tested positive for the novel coronavirus nucleic acid in imported cold chain food from the Changjing Cold Chain Storage Center in Hongshan District. . The new nucleic acid of the coronavirus was detected in the outer packaging of frozen pork imported from Brazil and frozen meat imported from Uruguay. .
From November 20 to December 4, some of these products have been sold to many cities and prefectures in Hubei province through online shopping platforms such as Meituan Optimal and Shihuituan.
An industry insider familiar with the anti-epidemic process for imported cold chain foods told CBN reporters that these products may have “non-conforming” operations in the pre-sale testing process.
At present, the New Crown Hubei Province Pneumonia Epidemic Prevention Headquarters is conducting traceability investigations, investigation and control, and epidemic treatment. Consumers who have bought the products involved in the aforementioned platforms are organized one by one with the relevant institutions for nucleic acid testing.
Pre-sale or non-compliant operations
The medical treatment and disease control group of the Wuhan New Crown Pneumonia Epidemic Prevention and Control Headquarters issued an announcement on the 6th that after the investigation, the foreign exporter of frozen pork loin imported from Brazil is SEAA ALIMENTOS LTDA, and the manufacturer’s registration code is SIF: 15, The production batch number is SI27032020. This batch of goods for a total of 1,527 boxes (approximately 18 kg / box), 27.49 tons, left Brazil. After entering Shanghai on June 28, they were temporarily stored in Shanghai’s Yangshan Port Yard and departed from Shanghai for Wuhan on July 27. Entered Changjing Cold Storage in Baishazhou, Hongshan District on July 29.
Uruguay imports frozen boneless meat, the foreign exporter is BREEDERS AND PACKERS URUGUAY SA, the manufacturer’s registration code is Uruguay 310 Factory N / M, and the production batch number is 20191205. This batch of merchandise totaled 1210 boxes (approximately 22 kg / box), 26.93 tons, departed from Uruguay and stopped in Malaysia, temporarily stored in Tianjin Tianqiao cold storage after entering Tianjin on March 2, and transported to Baishazhouchang, Hongshan District the 28th of March. Jing cold storage.
The announcement indicated that the destination of the two previous shipments has been clarified and related investigations are ongoing.
The CBN reporter learned that these two batches of “toxic” products have entered circulation. From November 20 to December 4, some products have been sold to Wuhan, Ezhou, Huangshi, Huanggang, Jingmen, Jingzhou, Qianjiang, Tianmen, Xianning, Xiaogan, etc., through community group purchasing platforms such as Meituan Optimal Group and Shihui Group. Yichang, Enshi and many other cities and prefectures in Hubei province.
On November 12, at a multi-department press conference held by the Joint Prevention and Control Mechanism of the State Council to introduce strengthening the prevention and control of the winter epidemic, Chen Di, head of the Department of Operations Food of the State Administration of Market Supervision, said that the local market supervision departments should guide the relevant food producers and operators. When purchasing imported cold chain food, verify and obtain a nucleic acid test report and certificate of disinfection for imported cold chain food issued by a disinfection unit. Whoever does not present a certificate of conformity will not be able to go on sale.
The industry experts mentioned above stated that imported food from the cold chain must go through multiple inspections from entry to distribution channels. “Upon entering China Customs, a nucleic acid sample will be taken. Each in-country transfer must be re-sampled in the jurisdiction. After being delivered to the next level warehouse, the supplier will conduct another random inspection before selling. Only after passing the test, it can be distributed to the retail warehouse for sale.For the community group purchasing platform, before the imported food from the cold chain is delivered to the community, the jurisdiction’s quarantine department You have to go to the warehouse for another nucleic acid test, and only after the result is qualified can it be shipped. “
With such a rigorous testing process, why did the two batches of imported frozen meat that were sold in the market test positive for nucleic acid?
The person analyzed that this batch of products may have “non-conforming” operations in the pre-sale testing process. “It may be that the supplier sold directly without random inspection; it may also be that the supplier has two warehouses and sold to the online shopping platform. The warehouse was randomly inspected and approved, and the other warehouse did not have a random inspection. , and the disease control department found the nucleic acid to be positive. “” Frozen meat that tested positive on the market will definitely be responsible. “
A reporter from China Business News learned that some community group buying platforms have voluntarily informed the market supervision and management department of their jurisdiction to suspend the sale of imported frozen and chilled food.
How difficult is it to sanitize frozen food?
Since December, CBN reporters have reviewed and found that cases of positive nucleic acid detection of the novel coronavirus in the cold chain setting have involved Hubei, Zhejiang, Shandong, Henan, Shanxi, Anhui, Liaoning, Heilongjiang and other provinces.
Imported frozen chicken wings found at Wanbang Market in Zhongmu County, Henan Province tested positive for internal packaging, imported frozen meat samples found at Yuhuan Vegetable Farm in Zhejiang were positive, and outer packaging of imported frozen beef from Shandong Juye tested positive for nucleic acid … Concentrated in coastal areas, recent cases show that the new corona virus has penetrated deep into our inland provinces through chain logistics of cold.
An epidemiologist told China Business News that it is difficult for imported frozen foods to achieve zero contamination from the new coronavirus. “If you want to avoid the new coronavirus, the best way is to use fire, but it is not realistic to burn food, so the disinfection of food is particularly problematic.” The expert said that the inspection of items and packaging should be further strengthened at the time of entry to minimize contaminated items enter the country.
How to sterilize in a low temperature environment is also a new topic. Zhang Liubo, chief disinfection expert at the Chinese Center for Disease Control and Prevention and director of the Center for Disinfection and Infection Control at the Environmental Institute, said that in the past disinfection was said to take place at room temperature or even high. The disinfection of food from the cold chain at low temperature was after the outbreak of the new corona epidemic this year. A new problem has just appeared.
“Low temperatures can sometimes cause the effectiveness of disinfectants or disinfection methods to be greatly reduced and sometimes even make common disinfection methods completely ineffective.” Zhang Liubo said that for low-temperature frozen food, chemical disinfection methods are relatively easy to implement. For example, use a chemical sanitizer spray to sanitize the surface of the outer packaging of frozen food. It is necessary to ensure that the disinfectant is in full contact with all sides and all positions of the package, and a certain contact time must be maintained to achieve the disinfection effect.
Zhou fang
Ma Xiaohua
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