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    Home > Medical News > Latest Medical News > Spain detected what the new coronavirus means from wastewater in March last year

    Spain detected what the new coronavirus means from wastewater in March last year

    • Last Update: 2020-11-28
    • Source: Internet
    • Author: User
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    , June 27
    Xinhua
    -- A team of researchers led by the University of Barcelona in Spain detected the new coronavirus in a sample of wastewater collected in Barcelona in March last year, Xinhua News Agency correspondent Guo Shuang Zhaoxuan said in a statement. If confirmed, does this conclusion mean that the new crown outbreak occurred earlier than reported? Can the detection of wastewater provide a more realistic understanding of when and how widespread the new crown outbreak began to spread?April 13 this year, researchers from the University of Barcelona's enterovirus team tested local wastewater samples weekly for traces of the new coronavirus. As part of Spain's new coronavirus "sentinel monitoring project", the study aims to respond in a timely manner to a possible new outbreak.
    also tested frozen wastewater samples from a wastewater treatment plant, resulting in the detection of the new coronavirus in wastewater samples taken on January 15, 2020. The first confirmed case of a new crown in Spain was reported on 25 February this year.
    the findings prompted researchers to examine earlier archived wastewater samples. Analysis of wastewater samples from January 2018 to December 2019 showed that the wastewater neo-coronavirus polymerase chain reaction (PCR) collected on March 12 last year tested positive and the level of the virus was very low;
    the study, which points to the possibility that the new coronavirus has spread in Barcelona before the world reports its first new coronavirus. Albert Bosh, a professor of biology at the University of Barcelona who led the study, said in a statement that Barcelona is a commercial and tourist center that receives many foreign visitors. The findings suggest that similar situations may occur in other parts of the world, but many cases may be covered up by misdiagnosis as influenza.as president of the Spanish Society of Virologists, Bosh also said that if the presence of the new coronavirus had been detected as early as January this year, it would help to improve the response to the outbreak. On the other hand, due to a lack of awareness of the new coronavirus, early new crown cases are likely to be misdiagnosed as common influenza, thus exacerbating community transmission.
    before humans discovered the new coronavirus, did it begin to spread among people? The University of Barcelona's findings have been submitted for peer review, but many experts have questioned the direction of the results.
    , of the Spanish Society for Public Health and Health Management, said it was too early to judge the outbreak based on the findings. Since there is only one study, more data, more studies, more samples are needed to confirm the results, and factors such as experimental errors or problems with the method need to be eliminated; But Villarvi does not deny that the study is "very enlightening."
    Medema, a microbiologist at the KWR Water Research Institute in the Netherlands, suggested that the team at the University of Barcelona retest the archived samples to confirm the existence of the new coronavirus. Other scholars believe that the concentration steps prepared for this study samples at the University of Barcelona are not standardized.
    of the study, it is not easy to prove it in the second round of experiments. The
    quoted Bosh as saying his team was unable to repeat the test in a positive sample in March 2019 because it had been consumed in the first test. "We proved this from the sample, but we can't repeat it," Bosh said.studies have shown that there is a large number of coronavirus genomes in fecal excreta in new crown patients, and that viral genes are eventually mixed into wastewater, which is the theoretical basis for the study of new crown epidemiology based on wastewater.
    In February this year, Zhong Nanshan
    and Li Lanxuan
    team isolated the new coronavirus from the stool samples of the new crown patients, this discovery confirmed that the patient's excreta does exist live virus, for understanding the mechanism of the virus pathogenicity, to help the whole society cut off the transmission of the epidemic and more targeted prevention and control is of great significance.
    as the new crown outbreak continues to spread at multiple points around the world, researchers in many countries are experimenting with epidemiological studies based on wastewater samples as a tool to monitor the spread of the new coronavirus.
    preliminary results show that the levels of new coronavirus ICTs in sewage can basically reflect the spread of the virus in specific areas, the Finnish National Institute of Health and Welfare said in a communique on June 2. The method could also be used to identify the genotype of the virus, which the researchers presumed had different infection capabilities from different sources of the new coronavirus.
    In addition to traditional testing methods, Singapore is using testing wastewater for new coronavirus and other methods to find out if there are new crown patients in a particular population, such as foreign workers living in special dormitories, said Huang Yicai, Singapore's national development minister, on June 9.
    analysis of sewage samples can shed light on new coronavirus infections in the community, regardless of whether anyone has symptoms of infection, the Australian Federal Scientific and Industrial Research Organisation said in a June 19 bulletin. The agency's team has found a cost-effective, fast and efficient way to monitor the spread of the new coronavirus in the community through sewage, which will help prevent a second outbreak.
    , Italy, the United States, the Netherlands and other countries are also carrying out such research. The researchers believe the research is expected to help scientists detect the spread of the virus in people early in an as-yet-undetected outbreak, especially in asymptomatic populations, so that they can be more targeted for prevention and control.
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