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Video: Coronavirus Found In Sputum And Feces Of Patients After Hospital Discharge
Coronavirus found in sputum and feces of patients after hospital discharge
New data raises the question of whether patients with negative pharyngeal swabs can be considered virus-free.
Photo: PuritanUSA / YouTube /
Accurate diagnosis of the new coronavirus infection COVID-19 is essential to contain the spread of the infection. People who shed the virus and are able to infect others require isolation. This method of prevention is especially important given the fact that neither a vaccine nor a specific treatment for the new coronavirus infection has yet been developed.
According to the WHO recommendations, the minimum amount of COVID-19 diagnostics (for outpatients) is the detection of the virus in the pharyngeal smear material. At the same time, it is known that coronavirus can be detected not only in the respiratory tract, but also in blood, feces and even urine.
A new study, published in the Annals of Internal Medicine, found that even if a person tests negative on a pharyngeal swab, they can still shed coronavirus. According to new data, the virus can be found in feces and sputum in some of these patients.
"These findings raise the question of whether patients with negative pharyngeal swabs can be considered virus-free or if additional testing is required," the authors write.
What have the scientists done?
The authors analyzed data from testing for coronavirus from 133 patients at a hospital in Beijing. All of them had a laboratory confirmed diagnosis of COVID-19. Patients were discharged when they had no fever for at least three days, respiratory symptoms disappeared, radiological parameters improved and a pharyngeal smear test for coronavirus was twice negative.
Scientists have tested patients for coronavirus after discharge. In 22 discharged people, it was found in sputum for up to 39 days or in feces for up to 13 days. During this time, throat swabs in this group of patients were negative.
What the experts say
“It has long been known that with many viral diseases, after recovery, people can secrete a certain amount of viruses. But usually in small amounts,”Professor William Schaffner (William Schaffner) of Vanderbilt University told Business Insider. That is, the presence of a small amount of the virus does not in itself mean that a person can infect other people.
The authors of the study themselves believe that the diagnosis, which is obtained on the basis of a smear from the pharynx, should be considered the basis for the decisions that the doctor makes.