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EuropePMC; 2022.
Preprint in English | EuropePMC | ID: ppcovidwho-335244


Microbiocidal products for decontaminating both animate and inanimate surfaces that may act as vectors for disease transmission are a well-established method for inactivating viruses of clinical significance. There are a wide variety of such microbiocidal products that can be purchased commercially, many with different active ingredients. We have recently shown that Rosin soap (derived from Tall Oil that has been produced by trees) is a highly effective virucidal product against enveloped viruses like influenza A virus and SARS-CoV-2 when tested in solution. Here we further demonstrate that Rosin soap retains its virucidal activity against influenza A virus and SARS-CoV-2 when applied to surfaces, such as plastic, glass and steel, either before or after virus inoculation. The virucidal activity extended out to seven days post administration. Together, our results show the potential for Rosin soap-based disinfectants to be used as a surface coating to protect against clinically relevant enveloped viruses, such as influenza viruses and coronaviruses.

Microbiol Spectr ; 9(3): e0109121, 2021 12 22.
Article in English | MEDLINE | ID: covidwho-1591660


Chemical methods of virus inactivation are used routinely to prevent viral transmission in both a personal hygiene capacity but also in at-risk environments like hospitals. Several virucidal products exist, including hand soaps, gels, and surface disinfectants. Resin acids, which can be derived from tall oil, produced from trees, have been shown to exhibit antibacterial activity. However, whether these products or their derivatives have virucidal activity is unknown. Here, we assessed the capacity of rosin soap to inactivate a panel of pathogenic mammalian viruses in vitro. We show that rosin soap can inactivate human enveloped viruses: influenza A virus (IAV), respiratory syncytial virus, and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). For IAV, rosin soap could provide a 100,000-fold reduction in infectivity. However, rosin soap failed to affect the nonenveloped encephalomyocarditis virus (EMCV). The inhibitory effect of rosin soap against IAV infectivity was dependent on its concentration but not on the incubation time or temperature. In all, we demonstrate a novel chemical inactivation method against enveloped viruses, which could be of use for preventing virus infections in certain settings. IMPORTANCE Viruses remain a significant cause of human disease and death, most notably illustrated through the current coronavirus disease 2019 (COVID-19) pandemic. Control of virus infection continues to pose a significant global health challenge to the human population. Viruses can spread through multiple routes, including via environmental and surface contamination, where viruses can remain infectious for days. Methods for inactivating viruses on such surfaces may help mitigate infection. Here, we present evidence identifying a novel virucidal product, rosin soap, which is produced from tall oil from coniferous trees. Rosin soap was able to rapidly and potently inactivate influenza virus and other enveloped viruses.

Antiviral Agents/pharmacology , Resins, Plant/pharmacology , Soaps/pharmacology , Antiviral Agents/analysis , Influenza A virus/drug effects , Influenza A virus/growth & development , Plant Oils/analysis , Plant Oils/pharmacology , Resins, Plant/analysis , SARS-CoV-2/drug effects , SARS-CoV-2/growth & development , Soaps/analysis , Virus Inactivation/drug effects