Health
Airborne viruses can diffuse in the air on dust, fibers, and microscopic particles: a study
Key Point
- Every year, hundreds of thousands of people in the world get seasonal flu,
- The exact method of influenza transmission between humans has always been debated
- New study says airborne transmission of virus occurs via non-respiratory particles
The airborne transmission of the virus is implicitly assumed to result from sneezing, coughing, or respiratory droplets released during speech. However, scientists have now demonstrated that airborne viruses travel through non-respiratory droplets, such as microscopic particles known as “aerosolized fomit.”
Their findings may have obvious implications for new coronavirus infections. The World Health Organization (WHO) COVID-19 may float in the air last month.
Researchers at the University of California, Davis and Mount Ikern School of Medicine, Sinai, have shown that microparticles can be produced from inanimate objects that rub the airborne virus-contaminated paper tissue by hand. Their findings are Natural communication..
“The ability of dust in the air, rather than airborne droplets, to carry the influenza virus that infects animals is really shocking to most virologists and epidemiologists. Opening up will have a major impact on the way laboratory experiments are interpreted. Epidemiologic investigations of outbreaks.” Said Principal Investigator, Professor William Listempert, Department of Chemical Engineering, University of California, Davis.
The researchers used to Airborne virus Like the influenza virus, it spreads in several different ways, via respiratory droplets from infected people and secondary objects such as used tissue and door handles, but which route is more important? Is almost unknown.
the study:
Experts at the University of California, Davis, worked with virologists at Mount Sinai to analyze whether small non-respirable particles or “aerosolized mitts” could carry the virus between guinea pigs.
An airborne particle count automatic particle sizer has revealed that uninfected guinea pigs release spikes of up to 1,000 particles per second as they move around their cage. Surprisingly, they found that there was always a much lower percentage of particles released by guinea pig respiration.
They found that an immune guinea pig with a virus on its fur infects other vulnerable animals via the air. Studies have shown that the virus need not come directly from the respiratory tract to be infectious.
Researchers have also tested whether inanimate microfibers can carry infectious viral particles. After treating the paper face tissues with the virus, they were dried and crumpled in front of an automated particle sizer. They found that crumpling a paper tissue releases up to 900 particles per second in the inhalable size range. Particles from contaminated paper tissue were able to infect cells.
“Dry influenza virus is long enough to aerosolize into non-respirable dust particles that can transmit the infection through the air to new mammalian hosts in environments such as paper tissues and the body of living animals. For the time being, it will continue to survive in the environment.” Researcher in their paper published in Nature Communications.
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