General, Research, Technology

In China, another outbreak of the contagious virus. What do you need to know?

There was an outbreak in China five years agothe contagious STFS virus that subsequently spread to Japan and South Korea. The death rate in 2015 in China was 30%, and virologists from South Korea and Japan reported similar data. However, in the midst of the fight against the Covid-19 pandemic, Chinese officials reported a new outbreak of SFTS, which affected about 37 people in eastern Jiangsu province and 23 in Anhui province in early August. It also reported the death of seven infected. It should be noted that this virus, which belongs to the bunyanvirus family, is not new and was first discovered back in 2009. Moreover, as reported by the Izvestia newspaper, the SFTS virus, which is carried by ticks, is present in Russia.

The causative agent of the virus, which is carried by ticks, belongs to the family of Bunyaviruses

Bunyan viruses Is a family of RNA viruses,which got their name after the area in Uganda (Bunyamwera), where they were first discovered. Today virologists distinguish 5 genera and more than 150 species of bunyanviruses. Phlebovirus and Nairovirus viruses are transmitted to humans by arthropods.

Content

  • 1 What is SFTS Virus?
  • 2 Symptoms of the STFS virus
  • 3 Is there a cure for the SFTS virus?
  • 4 Why is the SFTS virus of concern to virologists?

What is SFTS Virus?

Given the impressive number of speciesbunyanviruses, in addition to STFS, researchers isolate viruses of the genus Hantavirus, which are spread by rodents and transmitted to humans through contact with them .; viruses of this kind cause serious human diseases - hantavirus hemorrhagic fever, which causes nephrotic syndrome and hantavirus pulmonary syndrome. But the genus Tospovirus includes only plant viruses, for example, the tomato spotted wilt virus, which is ubiquitous in the area of ​​growing tomatoes in the open field.

Despite being a carrier of the SFTS virusare ticks, it can spread in the human population. The infection is transmitted from person to person through blood and mucosal secretions. In a 2015 study, scientists identified four types of SFTS-carrying ticks: H longicornis, R microplus, H campanulata and D sinicus in dogs, cats, sheep and cattle. All infected animals are intermediate hosts for this bunyanvirus.

This is how the STFS virus carriers look like - female and male R microplus

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STFS Virus Symptoms

The symptoms of a deadly disease viruscaused by the STFS bunyanvirus include a sudden rise in temperature up to 39 degrees or more (fever), chills, loss of appetite, bleeding gums, gastrointestinal symptoms such as vomiting, diarrhea and abdominal pain, muscle pain, neurological disorders such as headache, confusion, seizures, thrombocytopenia (extremely low platelet counts in the blood), leukocytopenia (low white blood cell count), and coagulopathy (a blood clotting disorder that can lead to death from blood loss).

    Experts distinguish four stages through which an STFS virus infected passes:</ p>
  • Stage one - incubation period: after a tick bite, the virus takes 5 to 14 days to incubate. Symptoms appear after the end of the incubation period.
  • Stage two - fever: after the incubation period, the person develops flu-like symptoms such as fever, headache, muscle pain, and diarrhea. Symptoms can last from 5 to 11 days.
  • The Haemaphysalis longicornis mite, a carrier of the SFTS virus.

  • Third stage - multiple organ failure: due to severe leukocytopenia and thrombocytopenia, many patients suffer from multiple organ failure (a severe, nonspecific stress response of the body that develops as the terminal stage of most acute diseases and injuries), as well as disseminated intravascular coagulation (excessive blood clotting), which ultimately leads to blood clots and death.
  • Fourth stage - recovery.

Is there a cure for the SFTS virus?

As reported by the Global Times, the antiviralthe drug ribavirin, which has proven effective against various bunyanvirus infections, hemorrhagic fever and hantavirus pulmonary syndrome. Studies have shown that intravenous delivery of ribavirin can help to some extent in the treatment of the SFTS virus.

Recently on the air of radio Komsomolskaya Pravdaallergist-immunologist Vladimir Bolibok named the symptoms of the virus that killed 7 citizens of the Celestial Empire, but, to the greatest regret, he advertised a Russian drug with unproven efficacy - Ingavirin - on the air. Our regular readers probably know that Ingavirin is on the list of drugs (pacifiers and drugs whose effectiveness has not been proven).

Furthermore, even the mechanism of action of Ingavirin is unknown, about the active substance as an antiviral notnobody knows except the manufacturer. It is included in the list of vital drugs (VED). Let me remind you that the problem with the sale of fuflomycins in our country is quite acute, as I wrote about in a large article on antiviral drugs.

These tiny arthropods should not be underestimated as a tick bite can lead to death.

This is interesting: What to do to avoid being bitten by a tick?

Why is the SFTS virus of concern to virologists?

Virologists from the National CenterBiotechnology Information stated that the mortality rate from the SFTS virus is 6% among healthy people and about 30% among immunocompromised people. However, at the moment, scientists do not know much about the virus itself and about the methods of its treatment. In the course of the studies carried out, the goal of the specialists was to identify the method of infection and the ways of transmission of the virus, but the vaccine has not yet been developed, and, I believe, will not appear soon.

It has previously been reported that the virus can be transmitted from infected animals or humans to other people through blood, respiratory tract and open wounds.

One way or another, today each of us mustremember that climate change and high population density in some countries of the world contribute to outbreaks of various dangerous infectious diseases, and therefore you need to be very careful even while walking in the park. Already today, as a result of the melting of the Arctic glaciers, which formed more than 15,000 years ago, ancient microscopic infectious agents unknown to science can break free. Read more in the article by my colleague Ramis Ganiev.