Coronavirus Traces Found in March 2019 Sewage Sample – Spanish Study
Spanish virologists have found traces of the novel coronavirus in a sample of Barcelona wastewater collected in March 2019, nine months before the COVID-19 disease was identified in China, the University of Barcelona said on Friday.
The discovery of virus genome presence so early in Spain, if confirmed, would imply the disease may have appeared much earlier than the scientific community thought.
The University of Barcelona team, who had been testing wastewater since mid-April this year to identify potential new outbreaks, decided to also run tests on older samples.
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They first found the virus was present in Barcelona on Jan. 15, 2020, 41 days before the first case was officially reported there.
Then they ran tests on samples taken between January 2018 and December 2019 and found the presence of the virus genome in one of them, collected on March 12, 2019. The levels of SARS-CoV-2 were low but were positive,” research leader Albert Bosch was quoted as saying by the university.
The research has been submitted for a peer review. Dr Joan Ramon Villalbi of the Spanish Society for Public Health and Sanitary Administration told Reuters it was still early to draw definitive conclusions. “When it’s just one result, you always want more data, more studies, more samples to confirm it and rule out a laboratory error or a methodological problem, he said.
There was the potential for a false positive due to the virus’ similarities with other respiratory infections. “But it’s definitely interesting, it suggestive,& Villalbi said.
Bosch, who is president of the Spanish Society of Virologists, said that an early detection even in January could have improved the response to the pandemic. Instead, patients were probably misdiagnosed with common flu, contributing to community transmission before measures were taken.
Prof. Gertjan Medema of the KWR Water Research Institute in the Netherlands, whose team began using a coronavirus test on waste water in February, suggested the Barcelona group needs to repeat the tests to confirm it is really the SARS-CoV-2 virus.
Spain has recorded more than 28,000 confirmed deaths and nearly 250,000 cases of the virus so far.
Coronavirus Traces Found in March 2019 Sewage Sample – Spanish Study
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