What does it mean for us to test positive for an environmental sample

Sometimes the impact is quite large, and sometimes it may not have much impact.

For example, at the beginning of last year, when the virus was at its worst, I had the impression that it could be transmitted by walking through the corridor, or the virus was transmitted between the downstairs and the upstairs through the sewer and the toilet, and there were all kinds of unbelievable ways of infection when the soles of the shoes went home with the virus to infect the family!! But I think it will probably be a period of high incidence of the virus, and everyone is still a little contemptuous, so it will cause such a big infection.

But in the later period, such as the end of December last year, the new crown virus left on the computer of the staff in Wangjing, Beijing and the residual virus of some car parts, it seems that no large-scale infection occurred, and there were no residues of the new crown virus on the ice cream in Tianjin two days ago, but it seems that so far I have not heard that xx place is infected by the virus on the ice cream, so the impact is large or small.

Practical significance

Since the outbreak of the pandemic, many scientists around the world have sequenced the genes of the detected viruses and uploaded these sequences to a public platform shared around the world for scientists to study. At present, more than 40,000 new coronavirus genome sequences have been uploaded, and scientists have built a huge new coronavirus evolutionary tree. In this way, every new virus discovered, according to the so-called principle of maximum likelihood, that is, to see who looks more like, can find the corresponding branch position on the evolutionary tree.

If a nucleic acid fragment of the new coronavirus is found on an environmental specimen after testing, it may not necessarily be a live virus, but may also be the "remains" of the virus.

Then "COVID nucleic acid testing."

Positive" environmental specimens must not be infectious. Not necessarily. Be sure to see under what scenario the positive is found.

If it is found in living organisms (clinical samples, other organisms), then there is a high probability that it is alive. If it is found in the environment (including food), it must be judged by looking at the scene of the environment itself and the measures taken.

Importance of Environmental Samples:

The real-time analysis and determination of environmental samples provides the current status of environmental pollution, facilitates the traceability and treatment of pollutants, and provides an important scientific basis for the national environmental protection department to make decisions, verify laws and regulations, and improve environmental change trends. Its long-term storage in turn paved the way for future scientific developments.

The reanalysis of these samples and the in-depth study of environmental information after technical improvements provide a unique repository (bank).

With the rapid development of economic construction, human beings pay more and more attention to the quality of the living environment. Therefore, the establishment and development of environmental sample banks, regular long-term collection of samples, optimized sample processing methods, scientific characterization and programmed sample storage will certainly have a negative impact on environmental science.

plays an important role.

The above content refers to: Encyclopedia - Environmental Sample.

A positive environmental sample means that a corresponding virus is found within a specific sampling area, which has a certain potential risk of infection.

As the main means of laboratory testing of the novel coronavirus, nucleic acid testing has played a major role in the prevention and control of the epidemic in China. With the dynamics of local cases in the country"Clear"And the risk of virus transmission through items let the hidden deep tan bright hall into the understanding,"The characters are on the same page"It has become the focus of China's epidemic prevention and controlEnvironmental novel coronavirus nucleic acid monitoring has become one of the indispensable links in normalized prevention and control.

However, due to the new crown vaccination and related scientific research, the environmental monitoring of the new coronavirus nucleic acid has repeatedly appeared"False positives", which has brought trouble to the prevention and control of the epidemic. Therefore, in some high-risk areas, environmental samples will be randomly checked for testing.