Home politics A fifth of England now having its sewage tested to spot coronavirus outbreaks

A fifth of England now having its sewage tested to spot coronavirus outbreaks

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A fifth of England now having its sewage tested to spot coronavirus outbreaks


Analysing sewage for traces of coronavirus has helped officials spot spikes in Covid-19 cases in areas where relatively few people were being tested, according to the Environmental Department (Defra).

The programme to analyse sewage for traces of coronavirus is being used to provide an early warning for local outbreaks, officials have said.

The government-led scheme, which was first announced in June, is successfully detecting fragments of genetic material from the virus in waste water, Defra said.

Data from this testing, which has been rolled out to more than 90 waste water treatment sites across the UK, is being shared with the Joint Biosecurity Centre as part of NHS Test and Trace.

The fragments of the coronavirus are passed out from people’s bodies when they use the toilet. The detection of the material, which is not infectious, can indicate when a local community is having a spike in cases.

Officials said the results of testing can give local health teams a clearer idea of infection rates by identifying where there are high numbers, particularly of asymptomatic carriers and people before they start showing symptoms.

This can help them take early action to slow the spread of the virus.

Defra said the project had already worked successfully in an area of the south west of England, where sewage sampling showed a spike in coronavirus material despite relatively few people getting tested.

The information was passed on to NHS Test and Trace and the local council who were able to alert local health professionals to the increased risk and contact people in the area to warn of the rise in cases.

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How Covid-19 is growing across England

There are currently 44 sites in England where sampling is being done, covering 22% of the population, with plans to roll it out further.

There are also 24 sites in Wales and 28 in Scotland where sampling is being done, with the projects being led by the devolved administrations and the UK Government coordinating the findings.

Environment Secretary George Eustice said: “This is a significant step forward in giving us a clearer idea of infection rates both nationally and locally, particularly in areas where there may be large numbers of people who aren’t showing any symptoms and therefore aren’t seeking tests.

“NHS Test and Trace is able to use the science to ensure local health leads are alerted and can take action.”

Health Secretary Matt Hancock said: “This initiative is just one example of how we are working across government and with local partners to find innovative, new ways to track the outbreak, slow the spread of the virus and save lives.

“Monitoring and sampling wastewater offers another tool to help us identify outbreaks early on – helping NHS Test and Trace and local authorities target hotspots quickly and effectively.”

Separate work carried out by the National Institute for Biological Standards and Control (NIBSC) also identified coronavirus material in London sewage in February before cases were recorded in the area.

High levels of virus material were detected in March and April, followed by a considerable decrease in May and June, reflecting how the national lockdown curbed virus transmission.

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