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“The idea of monitoring wastewater to spot disease trends began with efforts to track the transmission of poliovirus in the 1930s. In the decades since, improved techniques for growing isolated cells in labs and analysing DNA have made the concept more practical.” – New Scientist magazine.
UVC light has been used to disinfect the water we drink for decades, but until covid came along we mostly ignored waste water. Now the waste water we produce is turning out to be surprisingly useful in
identifying potential health threats.
Once we know there’s a threat to human health and wellbeing we can swing into action with UVC disinfection, tackling pathogens before they get out of control. Let’s take a look at the science.
Covid started it, now sewage analysis might become permanent
A lab in Massachusetts, USA, is busy analysing thousands of wastewater samples from across the country. They’re checking for viruses and other signs of disease, and it’s proving so effective it is going to become permanent. Originally set up to pin down traces of the covid virus, now the facility is planning to track a wider array of pathogens in waste water, including seasonal flu and RSV.
It works because every time we use the loo we’re flushing fragments of pathogen, effectively a medical sample. All the samples we flush are collected in sewers to give scientists a ‘community-level urine or stool sample.’ The hope is that analysing the samples continually will help improve the national response to future pandemics, endemics, and new microbial threats.
The waste water samples are purified then the purified samples are genetically analysed to measure the number of copies of a virus’ genome in every millilitre of sewage. The concentration of viral fragments changes as a disease circulates through a city or area’s population, and the system reliably detects the presence of a virus even when as few as one person in 6500 is infected.
How wastewater surveillance is spreading around the globe
Biobot’s Massachusetts lab is already helping monitor community levels of the monkeypox virus that started appearing in the USA during 2022. Testing has also helped track the re-emerging polio virus. While it can’t identify individuals, the testing does give scientists and governments a big picture view of what’s going on, especially around covid when fewer people than ever are taking covid tests.
Because the testing system can also identify pollutants in communities’ waste water, it’s also handy for knowing when to make a rapid response to pollution events.
The
EU implemented similar monitoring during March 2021. Because every EU Member State acted fast, today we have 1370 or so EU wastewater treatment plants under regular surveillance, which contributed to the early detection of the covid virus and its variants across the EU. Because the data was shared with everyone involved, every country was able to make coordinated, well-informed decisions about the pandemic.
China is also doing more sewage surveillance, in large cities and beyond.
A 100% reliable way to kill almost 99% of pathogens
UVC light keeps our drinking water supplies safe and clean to drink. It also disinfects the air and every surface it touches, and it makes rooms and other indoor spaces safe in just a few minutes.
Our portable units wheel anywhere you like for fast disinfection, killing an enormous list of diseases and disease-causing nasties. Our fixed units sit beside your existing light fittings and quietly do their job, keeping people safe from illness in every imaginable setting, from hotels to cruise ships, schools to food production lines.
If you’d like to know more, please get in touch for an inspiring discussion.