People who contracted COVID-19 and whose nose samples had turned negative still showed traces of the virus in stool and sputum samples, shows a Chinese study.
Even if they consider their data to be very preliminary, researchers from the Institute of Infectious Diseases at Ditan Hospital in Beijing believe that they raise concerns since pharyngeal (nose) samples are currently widely used to establish if a person is free from the virus and is no longer contagious.
Dr. Fujie Zhang and his colleagues believe that their results should be verified with more participants, but also with a more varied sampling from other parts of the body.
Our study is based on convenience samples. Serial samples were not taken from patients according to a defined schedule.Dr. Fujie Zhang
Of the 133 people tested during this work, and whose initial samples from the nose were negative, 22 were declared positive following a fecal analysis or sputum.
Detailed analyzes have shown that the sputum and stool of these patients remained infected with SARS-CoV2 from 13 to 39 days after the sample results obtained from the nose were negative.
Researchers say there is also a need to establish the degree of contagiousness of these other bodily substances.
It is important to note that positive samples have also been obtained from patients deemed to be cured after their discharge from the hospital.
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