On February 9th, Professor Angel Serrano Aroca of the Catholic University of Velencia (UCV) will speak about his work on Antimicrobial Face Masks, Face Shields and...Lipsticks.

Face masks and face shields are accepted to be effective protective tools to avoid bacterial and viral transmission, especially against indoor aerosol transmission. However, the commercial materials used to produce these tools are not capable of inactivating pathogens such as SARS-CoV-2 or multidrug-resistant bacteria. Lipsticks are usually associated with higher physical, sexual and social attractiveness and are not generally made of antimicrobial materials either. In this context, we have developed new antimicrobial face masks and face shields with a biofunctional coating of benzalkonium chloride (BAK). These coatings were capable of inactivating SARS-CoV-2 in less than 1 minute of viral contact.

Moreover, the BAK coating was also effective against the life-threatening methicillin-resistant Staphylococcus aureus (MRSA) and Staphylococcus epidermidis (MRSE). Other antimicrobial face masks can be developed using a low-cost technology consisting of a solidified hand soap coating. Bio-based technologies for the production of antimicrobial face masks can also be applied using cranberry extracts by dip-coating. A novel bio-based lipstick containing cranberry extract was also developed to prevent infections caused by a broad range of microorganisms: enveloped and non-enveloped viruses; multidrug-resistant bacteria like MRSA, Escherichia coli, and Mycobacterium smegmatis, a surrogate of Mycobacterium tuberculosis; and the Candida albicans fungus. Therefore, all these antimicrobial tools are very promising in the current antimicrobial-resistance era.