Recently, Beijing's Xinfadi market broke out of the new crown virus. Relevant agencies have detected the new coronavirus in the cutting board used to cut imported salmon. Salmon has become a hot spot for a while. The major supermarkets in Beijing, Wumart and Carrefour, have all removed all salmon overnight.
Salmon will be infectedAre you infected with the new coronavirus? Experts have said: New Coronavirus belongs to the Coronavirus family, βCoronavirus genus, and βCoronavirus genus only infects Mammals. Generally speaking, fish are considered not to be infected with the new coronavirus.
In fact, as early as September 2019, the University of British Columbia (UBC) in Canada published the title: Endangered wild salmon infected by newly discovered viruses in the well-known biology journal Elife Research Papers. The study found that there are three new viruses in wild and farmed salmon, one of which has never been shown to infect fish before, and this virus is compatible withrespiratory coronavirusRelated, it belongs to a virus of the same order very similar to the coronavirus. The virus infects salmonfish gills, which shows that this virus has a similar infection strategy with its distant relative respiratory coronavirus.
Researchers used the macrotranscriptome sequencing technology to screen more than 6000 salmon (including wild, hatched and farmed ), three new viruses were found in his body, one of whichPacific salmon nidovirus (PsNV, hereinafter referred to as PsNV) has the strongest correlation with Microhyla letovirus 1 of the Coronavirus family (Microhyla letovirus 1, belonging to the order Nidovirus), and is the same as coronavirus The project is the sister group of the coronavirus (as shown below). For detailed information about the virus, please refer to References.
PsNV virus has been detected in hatcheries, aquaculture and wild Chinook salmon (Chinook), the wild one accounts for only 3%, and the red salmon (Sockeye) Not detected. PsNV is mainly distributed in the gill tissue of salmon. Researchers associate this with respiratory diseases caused by coronaviruses in mammals, such as MERS and SARS. PsNV is common in young salmon hatched in freshwater. Once they enter the seawater environment, the virus is almost undetectable. Researchers say that the infected fish either cleared the infection or died after entering the marine environment.
The corresponding author of this article and a researcher at the UBC Department of Earth, Ocean and Atmospheric Sciences Gideon Mordecai said: "foundIt has never been proven to infect fish viruses before, which we are very surprised. The PsNV virus is evolutionarily related to the respiratory coronavirus and is mainly distributed in fish gills. This shows that it has a similar infection strategy with its distant relatives in infecting mammals"; another corresponding author, UBC virologist Curtis Suttle said: "This virus It is widely distributed on dead and dying farmed and wild salmon, highlighting the threat of viral diseases to the aquaculture industry." The Coronavirus-like PsNV in salmon reported in this article, Provoked our thoughts: Can the coronavirus also infect fish? This phenomenon is worthy of in-depth study. Humans still know too little about unknown viruses. Although the possibility of fish infecting people is very small, it should not be ruled out directly! Thesis link:
This article is written by Tongji, Huazhong University of Science and Technology School of Medicine Li HuaProfessor to provide source news
This public account is hosted by the Microbiology Resources and Big Data Center of the Institute of Microbiology, Chinese Academy of Sciences
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