1 human case in China, what are the risks?

INFLUENZA A. In China, the first human case tested positive for the H3N8 avian influenza virus. He had a fever and other symptoms. According to virologist Jean-Claude Manuguerra, you should not worry, but he calls for observation. What is the H3N28 virus? What are the risks for humans? Information.

[Mis à jour le 29 avril 2022 à 14h12] On April 26, China announced the discovery first case of human infection with H3N8 avian influenza. The Chinese Ministry of Health has stated that this four year old boyliving in Henan province (central China). He tested positive for the H3N8 strain after being hospitalized in early April for fever and other symptoms. “This is the first time, at least in the days of modern virology, that we have H3N8 passage in humans.” commented Jean-Claude Manuguerra, virologist, trained veterinarian and head of biological emergency response at the Pasteur Institute, was interviewed by TF1 on April 28. “This is just one case” emphasizes Jeanne Bruger-Picoux, veterinarian and member of the National Academy of Medicine, with whom we contacted. The child would become infected through contact with birds. “JI don’t think you should be worried more than that. On the other hand, this is a signal that needs to be taken into account, and thattransmission of these viruses to humans should be monitored in generalrecommends Dr. Manuguerra.

What is the H3N8 influenza virus?

H3N8 is a subtype of the influenza A virus. or bird flu. So far, this type of virus has affected horses, birds, and dogs, as well as pinnipeds (seals, sea lions, and walruses). Avian influenza is an animal disease caused by the A strain of the influenza virus. “Avian influenza is a viral disease that affects birds and has a very high mortality rate among farm birds (chickens, geese, etc.).recalls the Pasteur Institute.

The family of a child who tests positive for H3N8 raises chickens and lives in area inhabited by wild ducks. The H3N8 virus is believed to be the cause 26% of avian influenza infections occur in wild ducks. According to a study published in 1997 the boy got infected directly from the birds, The ministry said, adding that tests carried out on people close to the patient did not reveal “no anomaly“. This case is the result of “random interspecies transmission” and the risk of large-scale transmission is low”. However, the Chinese Ministry of Health called for do not approach dead or sick birds. You should be aware that not all avian influenza viruses are transmitted to humans. Of the 144 strains of avian influenza A virus, four have so far caused infections in humans: H5N1, H7N3, H7N7 and H9N2. “The H5N1 avian influenza virus was first identified in 1997 during an outbreak in Hong Kong that killed six people.“The Pasteur Institute speaks.”The spread of infection among birds increases the likelihood of a new influenza virus appearing in the human population, develop the institution. To date, the avian influenza virus is not transmitted from person to person.

What are the symptoms of H3N8 bird flu?

Bird flu symptoms include:

  • high temperature (above 38°C)
  • fatigue,
  • muscle pain,
  • cough and sore throat.

In the case of a four-year-old child who tested positive for the H3N8 strain, “He was hospitalized in early April for fever and other symptoms“According to the Chinese Ministry of Health, which did not provide further details.

Sources:

-AFP

– Co-infection of wild ducks with influenza A viruses: distribution patterns and biological significance, April 23, 1997. Journal of Virology.

– Avian influenza, Pasteur Institute

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