SARS-CoV-2 concentrations and virus-laden aerosol size distributions in outdoor air in north and south of Italy.

Environment International
D ChirizziDaniele Contini

Abstract

The COVID-19 disease spread at different rates in the different countries and in different regions of the same country, as happened in Italy. Transmission by contact or at close range due to large respiratory droplets is widely accepted, however, the role of airborne transmission due to small respiratory droplets emitted by infected individuals (also asymptomatic) is controversial. It was suggested that outdoor airborne transmission could play a role in determining the differences observed in the spread rate. Concentrations of virus-laden aerosol are still poorly known and contrasting results are reported, especially for outdoor environments. Here we investigated outdoor concentrations and size distributions of virus-laden aerosol simultaneously collected during the pandemic, in May 2020, in northern (Veneto) and southern (Apulia) regions of Italy. The two regions exhibited significantly different prevalence of COVID-19. Genetic material of SARS-CoV-2 (RNA) was determined, using both real time RT-PCR and ddPCR, in air samples collected using PM10 samplers and cascade impactors able to separate 12 size ranges from nanoparticles (diameter D < 0.056 µm) up to coarse particles (D > 18 µm). Air samples tested negative for the presen...Continue Reading

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Citations

Mar 6, 2021·Current Allergy and Asthma Reports·Eric B Brandt, Tesfaye B Mersha
Mar 25, 2021·Environmental Science and Pollution Research International·Eduardo D WannazCarlos Valenzuela Huillca
Apr 7, 2021·Annals of the American Thoracic Society·Stephen A MeinMary B Rice
May 29, 2021·Archives of Microbiology·Gabriella Trombini MachadoBeny Spira
Jun 1, 2021·The Science of the Total Environment·Özgecan KayalarHasan Bayram
Mar 19, 2021·Allergy·Isabella Annesi-MaesanoGennaro D'Amato
Jun 29, 2021·Atmospheric Environment·Zeynab BaboliGholamreza Goudarzi
Jul 13, 2021·Journal of Hazardous Materials·Jyoti BhardwajJaesung Jang
Jul 2, 2021·Journal of Occupational and Environmental Hygiene·Nirmala T MyersGediminas Mainelis
Aug 20, 2021·Environmental Science and Pollution Research International·Luke Curtis
Oct 3, 2021·Environmental Science and Pollution Research International·Marianna ConteDaniele Contini

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Methods Mentioned

BETA
PCR
acid

Software Mentioned

QuantaSoft
QuantaSoft Analysis Pro

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