Imported food packaging "Chengyang" from many places, is the cold chain still safe?

Recently, imported whey powder used in Tianjin ice cream, cherries imported from Wuxi, Jiangsu, and frozen chicken wings imported from Zhongshan, Guangdong.

Does "nucleic acid positive" mean "contagious"? What are the current measures and effects for the comprehensive killing and testing of entry? How to eat cold chain food safely? The reporter interviewed authoritative experts and industry insiders in response to hot issues of common concern

Nucleic acid positive = contagious? Expert: Not necessarily

On January 14, Tianjin found three ice cream samples with positive nucleic acid test results for the new crown virus; on January 19, a batch of Brazilian frozen chicken wings in Zhongshan, Guangdong tested positive for the nucleic acid test results; January 23, 1 imported from Chile in Wuxi, Jiangsu The nucleic acid test of the new coronavirus on the inner surface of cherries was positive.

——What does a positive nucleic acid test result mean?

"Tests for live viruses, dead viruses, and viral fragments will all show positive nucleic acid

In other words, the direct expression of nucleic acid positive means that the object has been contaminated by a virus

"The genetic sequencing of whey powder samples failed to obtain all genome sequences, suggesting that the virus content may be low or the virus is incomplete (dead virus)

——Does a positive nucleic acid test result mean that it is contagious?

Su Xu said that there have been cases of positive nucleic acid on the surface of objects, but very few cases can be transmitted to humans

"A positive nucleic acid result does not necessarily mean it is contagious

Previously, Zhang Liubo, chief expert on disinfection of the China Centers for Disease Control and director of the Center for Disinfection and Infection Control of the Environmental Institute, made it clear that safe and effective disinfection of the outer packaging surface of imported cold chain food can achieve the inactivation of the new coronavirus and disinfect the surface before contacting the surface.

Guarding the "First Line of Defense" for entry

The exclusive data obtained by the reporter shows that as of 0:00 on January 26, the national customs has supervised the port link to carry out preventive disinfection of 14.

Customs, market supervision and other departments have made the transportation and storage of cold chain products the focus of epidemic prevention and control supervision, adopting preventive disinfection, centralized nucleic acid testing, supervision of special warehouses, and cold chain food traceability, etc.

Local governments are also taking action

Imported cold chain foods with negative nucleic acid test results are allowed to be released for circulation

"The cold-chain tunnel-type omnidirectional disinfection device developed by Tianjin Customs has been put into use

As of the 26th, the customs has taken emergency preventive measures against relevant 41 overseas food production companies, and taken measures to suspend export to China for 125 overseas production companies whose employees have been infected with the new crown pneumonia epidemic

How to eat cold chain food with confidence?

Nucleic acid testing of cold chain food packaging has been repeatedly "successful", mainly due to the following factors: first, most of the contaminated cold chain goods come from high-risk countries and regions; second, the low temperature resistance of the new coronavirus makes it easier to survive in the cold storage environment; Because of the large number of imported cold chain foods, it is difficult for nucleic acid sampling to find all potential risks

Chen Junshi, academician of the Chinese Academy of Engineering and general counsel of the National Center for Food Safety Risk Assessment, said that the new crown pneumonia is a respiratory infectious disease, not a food-borne disease, and the possibility of infection with the new crown virus through the digestive tract is very small
.

With regard to imported food, the public need not be overly nervous or careless
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Industry insiders have repeatedly stated that in the packaging and transportation of frozen food, it is not ruled out that workers have been infected with the new crown virus and transmitted to the packaging of goods through different contact methods
.

Pang Xinghuo, deputy director of the Beijing Municipal Center for Disease Control and Prevention, reminded that the public should wear masks and gloves when receiving imported goods, perform preventive disinfection of each layer of packaging, and promptly wash hands after handling
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At the same time, the packaging boxes and packaging boxes should be discarded or destroyed in time after disinfection, and try not to be brought indoors.
It is recommended that imported goods be stored for a period of time before use
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Cleaners, sanitation workers, and other related workers who come into contact with imported goods packaging or waste during work should strengthen their personal protection and do a good job of health monitoring
.

"Compared with frozen fish meat, fruits are stored at a higher temperature, and the virus will not survive on the surface of the fruit for too long
.
" said Wu Zunyou, chief epidemiologist at the Chinese Center for Disease Control and Prevention.
Maintaining hand hygiene and keeping raw and cooked separately may cause infection.
The risk will be very small
.

(Reporters Peng Yunjia, Liu Hongxia, Zhang Yuqi, Wang Junlu, Shao Kun)