Sewage testing could protect schools, hospitals from Covid-19 outbreaks
Skip to main content
  • Home
  • Economy
    • Aviation
    • Bazaar
    • Budget
    • Industry
    • NBR
    • RMG
    • Corporates
  • Stocks
  • Analysis
  • World+Biz
  • Sports
  • Features
    • Book Review
    • Brands
    • Earth
    • Explorer
    • Fact Check
    • Family
    • Food
    • Game Reviews
    • Good Practices
    • Habitat
    • Humour
    • In Focus
    • Luxury
    • Mode
    • Panorama
    • Pursuit
    • Wealth
    • Wellbeing
    • Wheels
  • Epaper
  • More
    • Subscribe
    • Videos
    • Thoughts
    • Splash
    • Bangladesh
    • Supplement
    • Infograph
    • Archive
    • COVID-19
    • Games
    • Long Read
    • Interviews
    • Offbeat
    • Podcast
    • Quiz
    • Tech
    • Trial By Trivia
    • Magazine
  • বাংলা
The Business Standard

Friday
January 27, 2023

Sign In
Subscribe
  • Home
  • Economy
    • Aviation
    • Bazaar
    • Budget
    • Industry
    • NBR
    • RMG
    • Corporates
  • Stocks
  • Analysis
  • World+Biz
  • Sports
  • Features
    • Book Review
    • Brands
    • Earth
    • Explorer
    • Fact Check
    • Family
    • Food
    • Game Reviews
    • Good Practices
    • Habitat
    • Humour
    • In Focus
    • Luxury
    • Mode
    • Panorama
    • Pursuit
    • Wealth
    • Wellbeing
    • Wheels
  • Epaper
  • More
    • Subscribe
    • Videos
    • Thoughts
    • Splash
    • Bangladesh
    • Supplement
    • Infograph
    • Archive
    • COVID-19
    • Games
    • Long Read
    • Interviews
    • Offbeat
    • Podcast
    • Quiz
    • Tech
    • Trial By Trivia
    • Magazine
  • বাংলা
FRIDAY, JANUARY 27, 2023
Sewage testing could protect schools, hospitals from Covid-19 outbreaks

Coronavirus chronicle

Reuters
13 November, 2020, 06:50 pm
Last modified: 13 November, 2020, 06:55 pm

Related News

  • Potential China wave is 'wild card' for ending Covid emergency: WHO advisors
  • WHO chief hopes Covid will no longer be emergency next year
  • The Prof Writes: Covid-19 - The one that got away from us
  • Long Covid remains a mystery, though theories are emerging
  • Nobel Laureate Amartya Sen tests Covid positive

Sewage testing could protect schools, hospitals from Covid-19 outbreaks

Testing sewage is cheaper and less invasive than swabbing hundreds of people, and it could be done more frequently

Reuters
13 November, 2020, 06:50 pm
Last modified: 13 November, 2020, 06:55 pm
Dr Francis Hassard and Nigel Janes sample partially treated wastewater for the coronavirus disease (Covid-19) as part of a study at the Cranfield University Wastewater Treatment Works in Cranfield in Cranfield, Britain in this undated photograph. Christian Trampenau/Cranfield University/Handout via REUTERS.
Dr Francis Hassard and Nigel Janes sample partially treated wastewater for the coronavirus disease (Covid-19) as part of a study at the Cranfield University Wastewater Treatment Works in Cranfield in Cranfield, Britain in this undated photograph. Christian Trampenau/Cranfield University/Handout via REUTERS.

Early in the pandemic, a few cities and countries around the world began testing sewage for evidence of the coronavirus, hoping to detect rising infections early.

Now some researchers are fine-tuning that strategy by moving upstream to test waste from single hospitals or other buildings, aiming to quickly pinpoint burgeoning Covid-19 outbreaks and stop them with testing and isolation.

While the virus primarily spreads through droplets expelled from the mouth and nose, it can also be shed via human waste.

Testing sewage is cheaper and less invasive than swabbing hundreds of people, and it could be done more frequently. With the virus again surging across much of the world, schools, hospitals and care homes badly need to catch new cases early.

"What we're trying to do is identify outbreaks before they happen," said Francis Hassard, a lecturer at Cranfield University, part of a project that started collecting samples at 20 London secondary schools last month.

Hassard's UK government-funded team will expand sampling to at least 70 schools. The program is a research project, meant to test the approach, and is not yet a full-fledged surveillance system.

In the Canadian province of Alberta, researchers at the University of Calgary have been gathering samples from three local hospitals, including the site of a recent outbreak in which 12 people died.

The team was still refining their methods when that outbreak began. When they went back to test wastewater, they found the amount of coronavirus genetic material rose 580% as the virus spread, said Kevin Frankowski, executive director of Advancing Canadian Wastewater Assets.

"We saw a very significant change," said Frankowski. "It was really strong proof that this ... approach works."

The project shares data with Alberta Health Services, which runs the province's hospitals. If levels spike again, they could respond by testing individuals or taking other steps to mitigate spread, depending on the situation, said Frankowski.

In the United States, professional services company GHD set up wastewater testing at a handful of university residences, and recently started advertising the service to long-term care homes, drawing significant interest, said Peter Capponi, a principal at GHD.

CLOSE TO THE SOURCE

So far, most sewage testing has been done at treatment plants. Dutch authorities publish a national statistic, based on samples from all over the country, and French authorities have cited similar data for months. The state of Ohio monitors water at treatment plants across the state.

However, it can take 24-to-36 hours for waste to arrive at a treatment plant, and heavy rain or industrial effluent can dilute samples.

When viral levels rise at a treatment plant, it is not always obvious what should be done. But when virus material suddenly appears in sewage leaving a single building, the path forward is more clear.

At the University of Arizona, for example, sewage from one residence turned positive on August 25. The next day, the university began testing students. Two tested positive and were isolated, heading off what could have been an outbreak, the school said in a release.

With most of these efforts in early stages, it is not yet clear how well the approach will work at scale.

Not every infected person sheds virus in their waste, and there is some disagreement among researchers on how early in the course of Covid-19 that shedding begins on average.

Human behavior can affect data collection. Do enough children use the bathroom at school to generate good data? The virus does not show up in urine, just solid waste.

There are also logistical issues.

"Buildings have multiple discharge points," said GHD's Capponi. "Some of them are not accessible. Some may show up on a design drawing, but were not constructed that way."

Outside the controlled environment of a treatment plant, sewage is less uniform. Sampling equipment can get clogged with toilet paper and other debris, said Hassard.

And a single "grab" sample might miss the virus. The UK project collects throughout the school day.

Higher-tech auto-samplers can collect waste over a longer period, but are in increasingly short supply as more testing programs ramp up.

MilliporeSigma, a unit of Germany's Merck KGaA MRCG.DE, makes the Centricon P-70 filter used on some waste samples.

The company has doubled production, a spokeswoman said, after an "unprecedented surge in demand" from governments hoping to test for the virus.

Top News

Coronavirus

Comments

While most comments will be posted if they are on-topic and not abusive, moderation decisions are subjective. Published comments are readers’ own views and The Business Standard does not endorse any of the readers’ comments.

Top Stories

  • Infograph: TBS
    State banks spend 80% of their forex for govt imports in H1
  • Manufacturers feel the pinch as consumers tighten belt
    Manufacturers feel the pinch as consumers tighten belt
  • Production remains halted in 8 Ctg power plants
    Production remains halted in 8 Ctg power plants

MOST VIEWED

  • Photo: Collected
    India launches world’s 1st intranasal Covid vaccine
  • A vial of the Pfizer-BioNTech coronavirus disease (COVID-19) booster vaccine targeting BA.4 and BA.5 Omicron sub variants is pictured at Skippack Pharmacy in Schwenksville, Pennsylvania, U.S., September 8, 2022. REUTERS/Hannah Beier
    US CDC still looking at potential stroke risk from Pfizer bivalent Covid shot
  •  A medical worker checks the IV drip treatment of a patient lying on a bed in the emergency department of a hospital, amid the coronavirus disease (COVID-19) outbreak in Shanghai, China, January 5, 2023. REUTERS/Staff
    China says Covid deaths down by nearly 80 percent
  • Sean Bagley, 14, receives the Pfizer-BioNTech coronavirus disease (COVID-19) booster vaccine targeting BA.4 and BA.5 Omicron sub variants at Skippack Pharmacy in Schwenksville, Pennsylvania, U.S., September 8, 2022. REUTERS/Hannah Beier
    Updated Covid vaccines prevented illness from latest variants -CDC
  • People embrace at the international arrivals gate at Beijing Capital International Airport after China lifted the coronavirus disease (COVID-19) quarantine requirement for inbound travellers in Beijing, China January 8, 2023. REUTERS/Thomas Peter
    China says peak Covid infections exceeded 7 million daily, deaths more than 4,000 daily
  • A woman holds a small bottle labelled with a "Coronavirus COVID-19 Vaccine" sticker and a medical syringe in this illustration taken October 30, 2020. REUTERS/Dado Ruvic/File Photo
    US proposes once-a-year Covid shots for most Americans

Related News

  • Potential China wave is 'wild card' for ending Covid emergency: WHO advisors
  • WHO chief hopes Covid will no longer be emergency next year
  • The Prof Writes: Covid-19 - The one that got away from us
  • Long Covid remains a mystery, though theories are emerging
  • Nobel Laureate Amartya Sen tests Covid positive

Features

Sketch:TBS

Why we need consumer education for consumer wellbeing

2h | Thoughts
Dr Ahsan H Mansur, Executive Director, Policy Research Institute. Illustration: TBS

Twin shocks call for stronger domestic policy response

3h | Thoughts
December-er shohor, taxi taken for airport and the Park Street bathed in lights. Photo: Jannatul Naym Pieal

Exploring Kolkata on foot, empowered by Google Maps

4h | Explorer
Island hopping in Bangladesh?

Island hopping in Bangladesh?

5h | Panorama

More Videos from TBS

Kajol’s road paintings bring change in Gafargaon

Kajol’s road paintings bring change in Gafargaon

18h | TBS Stories
Carew & Company witnessed a remarkable growth

Carew & Company witnessed a remarkable growth

19h | TBS Stories
PCB recalls cricketers from BPL ahead of PSL

PCB recalls cricketers from BPL ahead of PSL

21h | TBS SPORTS
Why Misha Sawdagar became villain instead of a Hero?

Why Misha Sawdagar became villain instead of a Hero?

20h | TBS Entertainment

Most Read

1
Picture: Collected
Bangladesh

US Embassy condemns recent incidents of visa fraud

2
Four top bankers arrested in DSA case filed by S Alam group 
Bangladesh

Four top bankers arrested in DSA case filed by S Alam group 

3
Illustration: TBS
Banking

16 banks at risk of capital shortfall if top 3 borrowers default

4
Photo: Collected
Splash

Hansal Mehta responds as Twitter user calls him 'shameless' for making Faraaz

5
A frozen Beyond Burger plant-based patty. Photographer: AKIRA for Bloomberg Businessweek
Bloomberg Special

Fake meat was supposed to save the world. It became just another fad

6
Representational Image
Banking

Cash-strapped Islami, Al-Arafah and National turn to Sonali Bank for costly fund

EMAIL US
[email protected]
FOLLOW US
WHATSAPP
+880 1847416158
The Business Standard
  • About Us
  • Contact us
  • Sitemap
  • Privacy Policy
  • Comment Policy
Copyright © 2023
The Business Standard All rights reserved
Technical Partner: RSI Lab

Contact Us

The Business Standard

Main Office -4/A, Eskaton Garden, Dhaka- 1000

Phone: +8801847 416158 - 59

Send Opinion articles to - [email protected]

For advertisement- [email protected]