Simulated Sunlight Rapidly Inactivates SARS-CoV-2 on Surfaces
Shanna Ratnesar-Shumate, Gregory Williams, Brian Green, Melissa Krause, Brian Holland, Stewart Wood, Jordan Bohannon, Jeremy Boydston, Denise Freeburger, Idris Hooper, Katie Beck, John Yeager, Louis A. Altamura, Jennifer Biryukov, Jason Yolitz, Michael Schuit, Victoria Wahl, Michael Hevey, and Paul Dabisch
National Biodefense Analysis and Countermeasures Center, Operated by Battelle National Biodefense Institute for the US Department of Homeland Security, Frederick, Maryland, USA
Previous studies have demonstrated that SARS-CoV-2 is stable on surfaces for extended periods under indoor conditions. In the present study, simulated sunlight rapidly inactivated SARS-CoV-2 suspended in either simulated saliva or culture media and dried on stainless steel coupons. Ninety percent of infectious virus was inactivated every 6.8 minutes in simulated saliva and every 14.3 minutes in culture media when exposed to simulated sunlight representative of the summer solstice at 40°N latitude at sea level on a clear day. Significant inactivation also occurred, albeit at a slower rate, under lower simulated sunlight levels. The present study provides the first evidence that sunlight may rapidly inactivate SARS-CoV-2 on surfaces, suggesting that persistence, and subsequently exposure risk, may vary significantly between indoor and outdoor environments. Additionally, these data indicate that natural sunlight may be effective as a disinfectant for contaminated nonporous materials.
snip...
The present study provides the first evidence that sunlight may rapidly inactivate SARS-CoV-2 on surfaces, suggesting that surface persistence, and subsequently exposure risk, may vary significantly between indoor and outdoor environments. However, in order to fully assess the risk of exposure in outdoor environments, information on the viral load present on surfaces, the transfer efficiency of virus from those surfaces upon contact, and the amount of virus needed to cause infection are also needed.
Keywords. COVID-19; environmental persistence; SARS-CoV-2; sunlight.
Coronavirus can survive long exposure to high temperature, a threat to lab staff around world: paper
The new coronavirus can survive long exposure to high temperatures, according to an experiment by a team of French scientists.
Professor Remi Charrel and colleagues at the Aix-Marseille University in southern France heated the virus that causes Covid-19 to 60 degrees Celsius (140 Fahrenheit) for an hour and found that some strains were still able to replicate.
The scientists had to bring the temperature to almost boiling point to kill the virus completely, according to their non-peer-reviewed paper released on bioRxiv.org on Saturday. The results have implications for the safety of lab technicians working with the virus.
THURSDAY, MAY 28, 2020
Reducing transmission of SARS-CoV-2
THURSDAY, JUNE 11, 2020
The effect of large-scale anti-contagion policies on the COVID-19 pandemic
SUNDAY, MAY 17, 2020
CORONAVIRUS IN TEXAS, More than 700 new cases of coronavirus meatpacking plants Amarillo region, 11 county deaths connected to Long Term Care Facility at Texas City
TSS
No comments:
Post a Comment