Mouthwash as a Preventive Measure Against Coronavirus Transmission

Introduction

Researchers across the globe are actively exploring potential treatments and vaccines for the SARS-CoV-2 pandemic. In the interim, medical professionals are seeking methods to mitigate the virus’s transmission. The coronavirus primarily spreads through droplets expelled by infected individuals, with a significant viral load present in the nose and nasal cavity.

The Role of Antiseptics

The coronavirus is enveloped by a protective layer that can be eradicated using antiseptics, such as alcohol. This characteristic provides both healthcare workers and the general public with effective means for hand sanitation to curb virus spread. Scientists have speculated that similar cleansing methods for the nose and mouth could potentially diminish the concentration of the virus and lower transmission risks, especially within the dental profession.

Research Study on Mouthwash Efficacy

To investigate this hypothesis, researchers from Ruhr-Universität Bochum in Germany conducted a study assessing eight different types of mouthwash for their ability to neutralize the coronavirus. The findings were published in the Journal of Infectious Diseases.

The study evaluated eight commercially available mouthwash products against three distinct strains of the SARS-CoV-2 virus. African green monkey cells, known for their susceptibility to SARS-CoV-2, were infected to determine the viral load, which indicates the virus concentration in a specific volume of blood. To simulate real-life conditions, an interfering substance was introduced to replicate respiratory secretions, and each mouthwash was agitated for 30 seconds with each viral variant to imitate the act of gargling.

Results: Mouthwash and Viral Load Reduction

All eight mouthwashes demonstrated a reduction in the viral load of the coronavirus, with three formulations showing significantly superior efficacy. The active ingredients in these top-performing mouthwashes included:

– Dequalinium chloride and benzalkonium chloride
– Polyvidone-iodine
– Ethanol and essential oils

The study indicates that while mouthwash can lower the viral load of the coronavirus, it is not a treatment for the virus.

Expert Commentary

Study author Toni Meister remarked in a press release, “Gargling with a mouthwash cannot inhibit the production of viruses in the cells, but could reduce the viral load in the short term where the greatest potential for infection comes from, namely in the oral cavity and throat – and this could be useful in certain situations, such as at the dentist or during the medical care of Covid-19 patients.”

Conclusion

While mouthwash may serve as a supplementary preventive measure against coronavirus transmission, it should not replace established treatments or safety protocols. Further research is necessary to fully understand its role in virus mitigation.

References

Toni Luise Meister, Yannick Brüggemann, Daniel Todt, Carina Conzelmann, Janis A Müller, Rüdiger Groß, Jan Münch, Adalbert Krawczyk, Jörg Steinmann, Jochen Steinmann, Stephanie Pfaender, Eike Steinmann, Virucidal efficacy of different oral rinses against SARS-CoV-2, The Journal of Infectious Diseases, jiaa471, https://doi.org/10.1093/infdis/jiaa471

Image by Annalise Batista from Pixabay.