Oral Antiseptics in SARS-CoV-2 Infection Control

The oral cavity serves as both a reservoir and a transmission route for SARS-CoV-2, owing to active viral replication in salivary glands and high titres in saliva and oropharyngeal secretions. Antiseptic mouthwashes aim to transiently reduce intraoral viral load and infectivity by targeting the viral lipid envelope or denaturing surface proteins. Key active ingredients include cetylpyridinium chloride (CPC), chlorhexidine digluconate (CHX), hydrogen peroxide, povidone-iodine and ethanol. In vitro assays demonstrate rapid virucidal effects, although cytotoxicity and formulation variables can influence outcomes. Clinical studies indicate modest but statistically significant reductions in salivary viral titres and infectivity, generally lasting from 15 minutes to one hour post-rinsing. The magnitude and duration of viral suppression depend on agent concentration, contact time and excipient composition. While not a standalone preventive measure, preprocedural oral antiseptics may complement masks, ventilation and hand hygiene to reduce viral shedding during dental or medical procedures. Further large-scale clinical trials and standardised protocols are required to establish optimal formulations, dosing intervals and their impact on transmission dynamics in healthcare and community settings.

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Oral Antiseptics in SARS-CoV-2 Infection Control publication trend

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Technical terms

Viral load: amount of viral RNA or particles in a biological sample, often quantified by PCR.

Virucidal activity: capacity of a substance to inactivate or destroy virus particles.

Lipid envelope: host-derived phospholipid bilayer that encases enveloped viruses, essential for infectivity.

Cetylpyridinium chloride (CPC): quaternary ammonium antiseptic commonly used in mouthwash formulations for its broad-spectrum activity.

Chlorhexidine digluconate (CHX): bisbiguanide antiseptic with persistent antibacterial and modest antiviral properties, frequently included in oral rinses.

References

1. Efficacy of a Mouthwash Containing CHX and CPC in SARS-CoV-2–Positive Patients: A Randomized Controlled Clinical Trial. Journal of Dental Research (2023).
2. In vivo effect of mouthwashes on viable viral load of SARS-CoV-2 in saliva: a pilot study. Journal of Oral Microbiology (2023).
3. Potential Role of Oral Rinses Targeting the Viral Lipid Envelope in SARS-CoV-2 Infection. Function (2020).