Tuesday, 13 October 2020

New study on coronavirus and surface survival


A new study of interest has been published in the Virology Journal “The effect of temperature on persistence of SARS-CoV-2 on common surfaces.”

 

This Australian study has looked at the survival rates of SARS-CoV-2 on surfaces, using initial viral loads broadly equivalent to the highest titres excreted by infectious patients. This found that viable virus was isolated for up to 28 days at 20°C from common surfaces such as glass, stainless steel and both paper and polymer banknotes.

 

Conversely, infectious virus survived less than 24 hours at 40°C on some surfaces.

 

At 20°C, the times taken to achieve a 90% reduction and a 50% reduction of viable viral particles are:

 

 

Surface

Average time for a 90% reduction

Average time for a 50% reduction

Stainless steel

6.0 days

1.8 days

Polymer bank note

6.9 days

2.1 days

Paper

9.1 days

2.8 days

Glass

6.3 days

1.9 days

Cotton

5.6 days

1.7 days

Vinyl

6.3 days

1.9 days

 

The researchers point out that the primary spread of the virus remains via aerosols and respiratory droplets, however contaminated surfaces also function as an important contributor in transmission of the virus.

 

It remains undetermined the degree of surface contact and the amount of virus required for infection.

 

Article link: https://virologyj.biomedcentral.com/articles/10.1186/s12985-020-01418-7

 

Posted by Dr. Tim Sandle, Pharmaceutical Microbiology Resources (http://www.pharmamicroresources.com/)

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