petak, 21. kolovoza 2020.
NEW STUDIES ON CORONA
NEW STUDIES
98 long-lasting symptoms that worried scientists: Is Covid-19 actually a systemic disease?
"In my opinion, everything has already been seen and described in other viruses," says Dr. Krajinovic
By: Tanja RudežPosted: August 20, 2020 3:14 pm
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Srdjan Vrancic / Cropix
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Well-known television sports journalist Mirna Zidarić recently announced on Twitter that her hair was falling out after suffering from Covid-19. Let us remind you, Mirna Zidarić became infected in June, probably during the tennis tournament in Zadar, where famous tennis players Novak Đoković and Borna Ćorić also became infected with the coronavirus .
Almost two months after the infection, journalist Zidarić has been suffering from hair loss, which has been one of the most common symptoms complained of by people who have had Covid-19 in recent weeks. But a new study of 1,567 people who got over Covid indicates 98 long-term symptoms, among which the most common are fatigue, muscle and joint pain, shortness of breath or difficulty breathing, insomnia, problems concentrating or focusing, headaches and anxiety.
The research, not yet published in a scientific journal, came from the Facebook station Survivor Corps, an online community where people talk about their experiences with Covid, led by Dr. Natalie Lambert , an associate professor of medicine at Indiana University, and a specialist. Wendy Chung of Columbia University Irving Medical Center.
New studies
- We still do not know what long-term effects Covid-19 has on health, on the neurological, cardiovascular, gastrointestinal or endocrine system. And that is why it should not be said that some kind of mass infection is good news, which could be heard in the media these days - warns prof. Branko Kolarić , member of the Government Scientific Council for Combating Pandemics.
Studies to date have shown that the coronavirus not only attacks the respiratory system, but affects a number of organs or organ systems in the human body (systemic disease).
- Covid-19 is a systemic disease that affects many parts of the body, including the brain. But the detailed mechanism of how the new coronavirus affects the brain is currently unknown. This may be due to a direct virus attack on brain cells or indirect mechanisms. Its action is somewhat similar to many other systemic viruses that also have strong effects on the nervous system - said prof. Dimitri Krainc , head of the Clinic of Neurology at Northwestern University in Chicago.
Neurological problems
As an increasing number of patients with Covid-19 have neurological problems, Dimitri Krainc, a world-renowned former student at the Faculty of Medicine in Zagreb, founded the first "Covid Neurological Clinic" with colleagues at Northwestern University.
- Since little is known about the long-term effects of the virus, we intend to monitor patients with neurological problems to see what happens over time. Overall, about 25 percent of our patients had symptoms of central nervous system dysfunction, including dizziness (17 percent), headache (13 percent), impaired consciousness (7.5 percent), acute cerebrovascular disease (3 percent), and ataxia. , 5 percent) and epileptic seizures (0.5 percent) - Krainc pointed out.
Immunologist Zlatko Trobonjača points out that there is ample evidence that Covid-19 is not "ordinary flu", but a serious disease that can have significant consequences in the long run.
- These consequences relate to chronic damage, especially to the heart and lungs, but also to other organs such as the kidneys, and to the development of chronic fatigue syndrome. This syndrome occurs most likely as a result of a storm of cytokines that cross the blood-brain barrier and damage parts of the brain. Hypercytokinemia can activate microglia, cells in the brain similar to macrophages, which with their activity and their products mediate brain damage - explained Zlatko Trobonjača, professor at the Medical Faculty in Rijeka.
- Another possible cause of this post-viral syndrome is damage to lymphatic drainage from the brain by the SARS-CoV-2 virus, which appears to enter the brain through the sieve bone, located between the nasal and cerebral cavities, through which the olfactory nerves pass, which is also possible. reason for the development of loss of sense of smell due to Covid-19. Lymphatic drainage of the brain takes place through the sieve of this bone, the disorders of which are associated with the development of chronic fatigue syndrome, not only in this but also in other viral infections such as Epstein-Barr virus, the cause of infectious mononucleosis. The syndrome is manifested by persistent fatigue in which rest does not help, exhaustion and inability to concentrate, and various cognitive deficits. Sleep disorders and muscle pains occur, which is why the disorder is also called "myalgic encephalomyelitis" - Trobonjaca emphasized.
Severe cases
One of the leading infectologists, Dr. Vladimir Krajinović from the Clinic for Infectious Diseases in Zagreb, believes that in the case of Covida-19 it is necessary to distinguish easier from severe cases of the disease.
- I think it is most correct to say that it is a potentially systemic disease because in mild and moderate cases it is only a respiratory disease, but in the most severe it is systemic and can manifest as multiorgan dysfunction. However, viremia, or the presence of the virus in the blood, is extremely rare, at least according to the literature. After each infection, various disorders remain for some time, depending on the severity of the disease and complications. In my opinion, everything has already been seen and described in other viruses - he concluded
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