The detailed text published in Bloomberg states that the presence of Covid-19 was detected in the soft stool of the first US patient, a detail that was not represented among the cases reported in Wuhan, China, the epicenter of the epidemic. This is not surprising, however, to scientists who study coronaviruses or doctors who have extensive knowledge of SARS.
Diarrhea was reported by about 10 to 20% of patients who had severe forms of acute respiratory syndrome about 17 years ago, and it was diarrhea that was the source of the explosive SARS epidemic at the Amoy Gardens housing complex in Hong Kong.
The SARS virus and the Covid-19 virus bind to the same specific protein receptors in the body's lungs and intestines, which means these organs are the primary targets of both viruses, says Zhang Lee, a professor of veterinary and biomedical science. at the University of Minnesota.
The discovery of the presence of coronavirus Covid-19 in the stool of a 35-year-old patient treated at Providence Regional Medical Center Everett in Washington was "interesting," said Scott Lindqvist, a state epidemiologist for contagious diseases at the Washington Department of Health.
"This is a complement to the knowledge about this disease," he said. "It means that the virus is not only present in the respiratory secretions but also in the droppings."
Scientists for the time being believe that the virus is transmitted primarily through secretions that are ejected when infected by infected persons on their palms, ie objects, and surfaces around them.
Much of the coronaviruses are so-called pneumoenteric viruses, which means they can reproduce in both the respiratory (gastrointestinal) and gastrointestinal (digestive) systems, says Ralph Barrick, professor of microbiology and immunology at Gillings School of Global Public Health at the University of North Carolina who has been studying coronaviruses for decades.
Flooded by hundreds of patients with severe pneumonia, doctors in Wuhan may not have focused on the signs of the digestive system, Barrick told Bloomberg.
Shijiang Sheng, deputy director-general of the Chinese Center for Disease Control and Prevention, and colleagues released a report in late January on the first 425 cases in Wuhan, saying they may have missed early infections where they were not. showed typical signs - such as fever and viral pneumonia - or those cases had mild symptoms.
"The primary focus in detecting cases was on patients with pneumonia, but we now realize that some patients may have gastrointestinal symptoms," said Cheng in a report published in the New England Journal of Medicine.
Finding the latest evidence of the presence of coronavirus Covid-19 in the stool of some patients certainly means further research, says Peter Collignon, a professor at the Australian National University Medical School in Canberra who is also an adviser to the Australian Government for infectious disease control.
"This is something new," he says. "We assume it is a respiratory secretion, but SARS has evidence of other pathways to infection. We have to be open to new knowledge. "
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