Valery LEBOVKA, “FACTS”
Almost from the first days after the outbreak coronavirus infection scientists know that SARS-CoV-2 affects the cells, not only in lungs but also in other tissues of the body, including within the nasal mucosa, esophagus, blood vessels and heart, as well as a number of other bodies.
This, in particular, explains why the waste of human life is so many virus particles. Along with the waste these particles fall into the waste water and sewage.
A group of British and Polish epidemiologists under the leadership of Professor Exeter University (UK) Jamie Shutler interested in what happens if part of the contaminated sewage gets into water before cleaning.
Preliminary results of a study published in the electronic scientific library medRxiv.
To answer this question, scientists have tried to determine how long particles of SARS-CoV-2 can be in the water and keep the ability to infect new victims. Shutler and his colleagues conducted a series of private experiments, and analyzed the results of other experiments.
As it turned out, the virus can be in the water for a very long time, if its temperature is sufficiently low. In a typical sewer drains, and waters of rivers and lakes, according to Shutler and his colleagues, the virus lives for about 25 days. Based on these estimates, epidemiologists have tried to estimate how many particles of SARS-CoV-2 can reside in reservoirs two dozen countries with the largest number of cases COVID-19.
In their calculations, the scientists assumed that infection requires that the water of rivers and lakes were at least 100 viral particles per 100 ml In most countries, this rate, according to researchers, it is easy to achieve or even exceed several times after dumping waste water or leaks into freshwater reservoirs.
In particular, stronger than this to be feared in the countries where the patients are concentrated in a single point, a relatively small amount of water consumed per capita and relatively low water temperature in rivers and lakes. The most vulnerable States in that respect became Spain, UK and Morocco within 24 hours after a major leak of sewage in the water of rivers and lakes in these countries could be almost 500 viral particles per 100 ml.
On the other hand, this risk is less likely affected North of the country with low population density, as well as some tropical and Equatorial States rich in water resources. The first came in Canada and Russia, and the second is Indonesia, Venezuela, Australia and New Zealand.
“Given the fact that the virus remains stable in a large range of pH at low temperatures, it is possible that it will survive in the waters of seas and oceans. ACE2 receptors in many species of cetaceans are very similar to their human counterpart, so they can be vulnerable to SARS-CoV-2. A special concern in this respect whales as their throat constantly pass large volumes of water”, — concluded scientists.
It should be added that article the scientists and reviewed by independent experts and editors of scientific journals, as it usually happens in such cases. Therefore, the conclusions from it and similar articles should be treated with caution.
Earlier, the “FACTS” wrote that in Britain, doctors have found an unusual feature of coronavirus: patients with black skin color are dying from COVID-19 three times more often than whites.