Dutch scientists have found the coronavirus in a city’s wastewater before COVID-19 cases were reported, demonstrating a novel early warning system for the disease.
SARS-CoV-2 — the virus that causes COVID-19 — is often excreted in an infected person’s stool.
Although it is unlikely that sewage will become an important route of transmission, the pathogen’s increasing circulation in communities would 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, about 50km southeast of Amsterdam.
The Netherlands confirmed its first COVID-19 case on Feb. 27 and discovered that 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.
“It is important to collect information about the occurrence and fate of this new virus in sewage to understand if there is no risk to sewage workers, but also to determine if sewage surveillance could be used to monitor the circulation of SARS-CoV-2 in our communities,” Medema, the institute’s principal microbiologist, and coauthors said in a paper released ahead of peer review.
“That could complement current clinical surveillance, which is limited to the COVID-19 patients with the most severe symptoms,” they said.
It is the first report of detection of the coronavirus in sewage, they said.
Wastewater surveillance is a well-established method of detecting poliovirus and antibiotic-resistant bacteria, as well as the use of illicit and prescription medications.
Sewage surveillance could also serve as early warning of the emergence and re-emergence of COVID-19 in cities, the Dutch scientists said.
“The detection of the virus in sewage, even when the COVID-19 prevalence is low, indicates that sewage surveillance could be a sensitive tool to monitor the circulation of the virus in the population,” they said.
BRUSHED OFF: An ambassador to Australia previously said that Beijing does not see a reason to apologize for its naval exercises and military maneuvers in international areas China set off alarm bells in New Zealand when it dispatched powerful warships on unprecedented missions in the South Pacific without explanation, military documents showed. Beijing has spent years expanding its reach in the southern Pacific Ocean, courting island nations with new hospitals, freshly paved roads and generous offers of climate aid. However, these diplomatic efforts have increasingly been accompanied by more overt displays of military power. Three Chinese warships sailed the Tasman Sea between Australia and New Zealand in February, the first time such a task group had been sighted in those waters. “We have never seen vessels with this capability
A Japanese city would urge all smartphone users to limit screen time to two hours a day outside work or school under a proposed ordinance that includes no penalties. The limit — which would be recommended for all residents in Toyoake City — would not be binding and there would be no penalties incurred for higher usage, the draft ordinance showed. The proposal aims “to prevent excessive use of devices causing physical and mental health issues... including sleep problems,” Mayor Masafumi Koki said yesterday. The draft urges elementary-school students to avoid smartphones after 9pm, and junior-high students and older are advised not
Philippine President Ferdinand Marcos Jr has fired his national police chief, who gained attention for leading the separate arrests of former Philippine president Rodrigo Duterte on orders of the International Criminal Court and televangelist Apollo Carreon Quiboloy, who is on the FBI’s most-wanted list for alleged child sex trafficking. Philippine Executive Secretary Lucas Bersamin did not cite a reason for the removal of General Nicolas Torre as head of the 232,000-member national police force, a position he was appointed to by Marcos in May and which he would have held until 2027. He was replaced by another senior police general, Jose
POWER CONFLICT: The US president threatened to deploy National Guards in Baltimore. US media reports said he is also planning to station troops in Chicago US President Donald Trump on Sunday threatened to deploy National Guard troops to yet another Democratic stronghold, the Maryland city of Baltimore, as he seeks to expand his crackdown on crime and immigration. The Republican’s latest online rant about an “out of control, crime-ridden” city comes as Democratic state leaders — including Maryland Governor Wes Moore — line up to berate Trump on a high-profile political stage. Trump this month deployed the National Guard to the streets of Washington, in a widely criticized show of force the president said amounts to a federal takeover of US capital policing. The Guard began carrying