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Sewage test shows contry is flush with Covid-19 case

However, because they were sampling the city departments by department, they were able to switch equipment and start sampling sewage to obtain evidence of the coronavirus.

Inchausti told CNN: “We are ready for this.”

Now the city regularly samples sewers to keep an eye on pandemics. The situation in parts of Tempe is not ideal.

And they are in poor condition in Boston, Reno, Nevada, or many other cities across the country.

According to standard tests, the number of coronaviruses per day can reach up to 70,000, and sewage tests indicate that the situation will get worse.

Inchausti said: “This is a leading indicator.” “The evidence is in the stool.”


Cities and universities across the country are testing sewage to monitor the virus. Studies have shown that this is a useful way to enhance standard person-to-person coronavirus testing. Although sewage samples cannot be directed to infected individuals, it can indicate that the infection is spreading in a certain area, nearby or even in a single building.

In the early days of the pandemic, it was clear that the Covid-19 virus entered the digestive system and could be found in human feces. From there, it just rushed into the sewer quickly.

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Mariana Matus, the co-founder and CEO of Biobot Analytics, which is analyzing sewage for dozens of customers, said sewage tests can show that the virus has spread even before people start showing up in hospitals and clinics and before they start queuing for Covid- . 19 tests.

Matus told CNN, “People start to shed the virus soon after being infected and before they start to show symptoms.”

The results are clearly displayed on the Massachusetts Water Resources Authority’s website, which shows Biobot’s analysis of data covering 2 million MWRA customers in the Boston area. It shows the peak of virus samples in April and May, and it has fallen back throughout the summer. Now, the virus is reappearing, and the sample level is close to the height of the spring pandemic.

Matus said: “We are seeing an upward trend in wastewater data, and I think this is roughly in line with the data we have seen across the country.” “It is really interesting to see that this is almost the second wave.”

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The positive rate of coronavirus testing in Massachusetts is still very low at 1.5%. But Matus said that the increasing number of positive blows from sewage indicates that more positive tests will be conducted.

“I think this is a good proof. We need to pay attention. The community needs attention.” said the biologist Matus, who was co-founded with a small group of colleagues at MIT.

She said that this small startup company was troubled by being asked to test its wastewater system. “Who doesn’t like poo stories?” Matus asked.

Krishna Paguila, director of the Nevada Water Innovation Institute at the University of Nevada at Reno and head of the Department of Civil and Environmental Engineering at the University of Nevada, said testing sewage for evidence of Covid-19 is like preparing a weather forecast.

Reno’s Pajira told CNN: “This is something we should be concerned about from the beginning of every community.”

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Coronavirus will decompose soon after being washed. Wastewater testing cannot recover the entire virus, but extracts two pieces of specific viral material, called RNA. It can no longer infect people, but it is easy to identify.

Finding this RNA in sewage can tell researchers that someone is using the system. The more RNA, the more people will be infected.

Pajila said: “We will know a few days in advance. We can notify the health authorities.”

Pajira said this is especially useful in college towns

He said: “People don’t want to be tested.” “Or we have students who say,’Hey, I have symptoms, but I want to hang out at home.’ They are not seriously ill, so they are not checked. But maybe they decide to go to the gym.”

Inchausti said in Tempe that the city will use this information more directly.

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She said: “This kind of relationship is more than just having data and looking at the data and then saying,’Very good.’

Instead, Inchausti, the city’s director of strategic management and diversity, said that her team published the data on a public website and used it to target the low-income population of ethnic minorities who are most likely to die from Covid-19. Income community.

One is designated as District 6 and is adjacent to the Arizona State University campus. Its 8,100 residents are basically low-income. Inchausti said that when the amount of coronavirus RNA in sewage rose recently, “we spent $15,000 to strike it with a mask with lightning.”

She added: “We met people locally.” “We knew they were going to the laundromat, so we helped them understand how to stay safe at the laundromat. We provided Covid-19 saliva at the nearby school. Test.” Now they are analyzing the test data to see if the intervention makes a difference.

Paguila said: “I believe that what Tempe is doing is the right way.”

Cresten Mansfeldt (Cresten Mansfeldt) said he thinks this has had an impact on the campus of the University of Colorado in Boulder.

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The school coordinated saliva tests of campus residents, and regular wastewater monitoring by students.

Mansfeldt, assistant professor of environmental engineering, said: “They look at the data every day.” He usually studies how microorganisms interact with the chemicals that people excrete from waste.

Students surged in the weeks after returning to campus in late August, reaching a peak of 130 positive PCR tests on September 17. But after the city and Boulder County imposed restrictions on college-age residents to prevent this from happening, the number plummeted to a few days and two weeks of gatherings of all sizes-not even two people. A week later, when students complained about safety issues, officials relaxed and let children aged 18-22 travel in pairs.

Currently, in Boulder County, the age limit of 18 to 22 is no longer restricted by other age groups.

Now campus cases have increased again, from one case on October 16 to five cases on October 22, and then to eight cases on October 26. He said: “Most sewers test negative.”

Both Inchausti and Pagilla stated that they hope state and federal officials will draw attention and start using sewage data to monitor and respond to pandemics throughout the country.

The US Centers for Disease Control and Prevention has established a website, hoping that state, tribal, local, and regional health departments can submit wastewater test data to the national database.

CDC recommends: “At present, community infection point estimation based on wastewater measurement should not be used.”

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