Health

SARS-CoV-2 survives on the surface for up to 28 days

CSIRO researchers say that SARS-CoV-2, the virus responsible for COVID-19, survives up to 28 days on common surfaces such as banknotes, glass as seen on cell phone screens, and stainless steel. I found that I could do it.

The study was conducted at the Australian Center for Disease Preparation (ACDP), which is committed to both understanding the virus and testing potential vaccines. It included drying the virus sample with artificial mucus on a different surface at a concentration similar to that reported for samples from infected patients, and then re-isolating the virus over a month. Experiments were performed at 20, 30, and 40 ° C.

Results of research published in Virology Journal, SARS-CoV-2 was found:

  • Survived longer at low temperatures.
  • It tended to survive longer on non-porous or smooth surfaces such as glass, stainless steel, and vinyl, compared to porous complex surfaces such as cotton.And
  • Survived longer with paper banknotes than with plastic banknotes.

The study was conducted in the dark to eliminate the effects of UV light, as the study showed that direct sunlight could rapidly inactivate the virus.

This work was carried out in a safe biosecurity level 4 laboratory at the Australian Center for Disease Preparation (ACDP).

“Our results show that SARS-CoV-2 can continue to infect the surface for extended periods of time, strengthening the need for good practices such as regular hand washing and surface cleaning. “Masu,” said Dr. Debbie Eagles, Deputy Director of ACDP.

“At 20 ° C, about the same as room temperature, the virus was found to be extremely powerful and survive for 28 days on smooth surfaces such as glass found on cell phone screens and plastic banknotes.

“In context, a similar experiment with influenza A found that influenza A survived on the surface for 17 days, demonstrating the elasticity of SARS-CoV-2.

“The exact role of surface transmission, the degree of surface contact, and the amount of virus required for infection have not yet been determined, but establishing a period of time for this virus to survive on the surface is in high contact areas. It is important for developing risk mitigation strategies. “

24 hours after application, dry droplets of SARS-CoV-2 in artificial mucus on glass.

ACDP Director Professor Trevor Drew said that many viruses continue to survive on the outer surface of the host, saying: “The length of time a virus can survive and remain infectious depends on the type, amount, surface, environmental conditions, and method of deposition of the virus. Droplets released by anti-cough.

“Proteins and fats in body fluids can also significantly extend the survival of the virus.

“This study may also help explain the apparent persistence and spread of SARS-CoV-2 in cool environments with high lipid and protein contamination, such as meat processing facilities.”

Dr. Larry Marshall, CSIRO’s CEO, said, “To more accurately predict and mitigate the spread of the virus and protect people by establishing how long the virus actually survives on the surface. You can do a better job. “

Image above: Droplets of SARS-CoV-2 in artificial mucus on a small piece of a $ 5 bill.

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SARS-CoV-2 survives on the surface for up to 28 days

Source link SARS-CoV-2 survives on the surface for up to 28 days

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