Covid19

Dutch scientists were able to find the coronavirus in a city’s wastewater before Covid-19 cases were reported, demonstrating a novel early warning system for the pneumonia-causing disease.

The so-called SARS-CoV-2 coronavirus is often excreted in an infected person’s stool. Although it’s unlikely that sewage will become an important route of transmission, the pathogen’s increasing circulation in communities will increase the amount of it flowing into sewer systems, Gertjan Medema and colleagues at the KWR Water Research Institute in Nieuwegein said on Monday.

They detected genetic material from the coronavirus at a wastewater treatment plant in Amersfoort on March 5, before any cases had been reported in the city, located about 50 kilometers (32 miles) southeast of Amsterdam. The Netherlands confirmed its first Covid-19 case on Feb. 27 and discovered health workers had fallen ill with the infection in a southern part of the country days later — a sign that it was spreading in the community.

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