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SARS-CoV-2 RNA Persistence in Naso-Pharyngeal Swabs

by Danzetta, Maria Luisa , Morelli, Daniela , Testa, Lilia , Puglia, Ilaria , Lorusso, Alessio , Monaco, Federica , Portanti, Ottavio , Di Giuseppe, Alessandra , Calistri, Paolo , Savini, Giovanni , Di Gennaro, Annapia , Casaccia, Claudia , Migliorati, Giacomo , Mercante, Maria Teresa , D’Alterio, Nicola , Amato, Laura , Cito, Francesca

in Abruzzo / Age / coronavirus / Coronaviruses / COVID-19 / Disease transmission / Epidemiology / Gender / Genetic aspects / Health aspects / Health care / health services / Italy / Males / men / monitoring / naso-pharyngeal swab / pandemic / Pandemics / patients / Pharynx / Physiological aspects / Proteins / qPCR / Respiratory diseases / Ribonucleic acid / RNA / SARS-CoV-2 / Severe acute respiratory syndrome coronavirus 2 / Standard deviation / Statistical analysis / Values / Viral diseases / viral shedding / Viruses

2020

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2020

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2020

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Journal Article

SARS-CoV-2 RNA Persistence in Naso-Pharyngeal Swabs

Danzetta, Maria Luisa,

Morelli, Daniela,

Testa, Lilia,

Puglia, Ilaria,

Lorusso, Alessio,

Monaco, Federica,

Portanti, Ottavio,

Di Giuseppe, Alessandra,

Calistri, Paolo,

Savini, Giovanni,

Di Gennaro, Annapia,

Casaccia, Claudia,

Migliorati, Giacomo,

Mercante, Maria Teresa,

D’Alterio, Nicola,

Amato, Laura,

Cito, Francesca

2020

Overview

Since February 2020, Italy has been seriously affected by the SARS-CoV-2 pandemic. To support the National Health Care system, naso-pharyngeal/oropharyngeal swabs collected from suspected cases of Teramo province, Abruzzo region, are tested at Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise G. Caporale, for the presence of SARS-CoV-2 RNA. Out of 12,446 tested individuals, 605 returned positive results at least once, with prevalence significantly higher in men. A reduction of the level of viral RNA in the first swab per each positive patient collected over time was also observed. Moreover, 81 patients had at least one positive sample and two final negative tests: positivity in swabs lasted from 14 to 63 days, with a median value of 30 days. This shows the potential for the virus to coexist with patients for a long time, although we highlighted intermittent positivity in several cases. The evolution of the SARS-CoV-2 epidemiological situation and knowledge on viral shedding should be closely monitored, to interpret the findings correctly and adjust accordingly the surveillance activities.

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Publisher

MDPI AG,MDPI

Subject

/ Age

/ Disease transmission

/ Epidemiology