the Virologist Jeremy Rossman (Jeremy Rossman) from the University of Kent in the United Kingdom have figured out how COVID-19 can affect the human brain and cause neurological symptoms. About the danger of coronavirus infections of a new type for Central nervous system (CNS) reported in an article published in The Conversation.
As the scientist told, the vast majority of cases caused by the coronavirus SARS-CoV-2 disease is a severe acute respiratory infection that causes fever, pain in throat, cough and, in more serious cases, shortness of breath and respiratory disorders. COVID-19 is capable of hitting and other tissues, causing symptoms such as vomiting, gastro-intestinal tract, disorders of the heart and blood clotting.
however, the infection has a negative impact on the brain. Describes the cases of patients with coronavirus infection of a new type of Guillain-Barre syndrome, when the immune system is reacting to COVID-19, mistakenly attacks cells of peripheral nerves. This defensive reaction leads first to the weakness in the muscles, and then paralysis. In some cases, SARS-CoV-2 caused severe encephalitis with inflammation and swelling of the brain and a stroke. In total, the neurological symptoms of varying severity are observed in 36% of patients who complain of headache, dizziness, loss of taste and smell, involuntary contraction of muscle fibers (seizures) and hallucinations. These symptoms were mainly observed in severe course of the disease and persisted after discharge from medical facilities.
Coronavirus infection of the new type is able to cross the blood-brain barrier that separates the Central nervous system (CNS) from the bloodstream and infect the brain. The symptoms are neurological in nature or arise as the result of exposure to SARS-CoV-2 on nervous tissue, or due to excessive activation of the immune system. Another way of getting COVID-19 in the brain can serve as olfactory neurons located in the nose of a person.
the article notes that infect the brain and other pathogens (influenza viruses, measles, respiratory syncytial virus and seasonal coronaviruses, such as HCoV-OC43). It is reported that the ingress of infection in the CNS is relatively rare.
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