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A randomized controlled study using silver nanoparticle mouthwash and nasal rinse compared with conventional mouthwashes in 231 individuals without a previous history of SARS-CoV-2 infection was conducted.
Only 2 participants of 114 healthcare workers (1.8%) in the experimental group became infected with the SARS-CoV-2 virus, which was a significantly lower rate than in the control group, in which 33 participants of 117 (28.2%) were infected. Silver nanoparticle mouthwash and nasal rinse may help prevent SARS-CoV-2 transmission in healthcare personnel who are exposed to patients diagnosed with COVID-19.
SARS-CoV-2 infection in hospital areas is of a particular concern, since the close interaction between health care personnel and patients diagnosed with COVID-19, which allows virus to be easily spread between them and subsequently to their families and communities. Preventing SARS-CoV-2 infection among healthcare personnel is essential to reduce the frequency of infections and outbreaks during the pandemic considering that they work in high-risk areas. In this research, silver nanoparticles (AgNPs) were tested in vitro and shown to have an inhibitory effect on SARS-CoV-2 infection in cultured cells. Subsequently, we assess the effects of mouthwash and nose rinse with ARGOVIT® silver nanoparticles (AgNPs), in the prevention of SARS-CoV-2 contagion in health workers consider as high-risk group of acquiring the infection in the General Tijuana Hospital, Mexico, a hospital for the exclusive recruitment of patients diagnosed with COVID-19. We present a prospective randomized study of 231 participants that was carried out for 9 weeks (during the declaration of a pandemic). The "experimental" group was instructed to do mouthwash and nose rinse with the AgNPs solution; the "control" group was instructed to do mouthwashes and nose rinse in a conventional way. The incidence of SARS-CoV-2 infection was significantly lower in the "experimental" group (two participants of 114, 1.8%) compared to the "control" group (thirty-three participants of 117, 28.2%), with an 84.8% efficiency. We conclude that the mouth and nasal rinse with AgNPs helps in the prevention of SARS-CoV-2 infection in health personnel who are exposed to patients diagnosed with COVID-19.
Evaluation of Silver Nanoparticles for the Prevention of SARS-CoV-2 Infection in Health Workers: In Vitro and In Vivo
PLoS ONE 2021 Aug 01;[EPub Ahead of Print], H Almanza-Reyes, S Moreno, I Plascencia-López, M Alvarado-Vera, L Patrón-Romero, B Borrego, A Reyes-Escamilla, D Valencia-Manzo, A Brun, A Pestryakov, N Bogdanchikova