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- Title
Demonstrating the In Vitro and In Situ Antimicrobial Activity of Oxide Mineral Microspheres: An Innovative Technology to Be Incorporated into Porous and Nonporous Materials.
- Authors
Iskandar, Katia; Pecastaings, Sophie; LeGac, Céline; Salvatico, Sylvie; Feuillolay, Catherine; Guittard, Mylène; Marchin, Loïc; Verelst, Marc; Roques, Christine
- Abstract
The antimicrobial activity of surfaces treated with zinc and/or magnesium mineral oxide microspheres is a patented technology that has been demonstrated in vitro against bacteria and viruses. This study aims to evaluate the efficiency and sustainability of the technology in vitro, under simulation-of-use conditions, and in situ. The tests were undertaken in vitro according to the ISO 22196:2011, ISO 20473:2013, and NF S90-700:2019 standards with adapted parameters. Simulation-of-use tests evaluated the robustness of the activity under worst-case scenarios. The in situ tests were conducted on high-touch surfaces. The in vitro results show efficient antimicrobial activity against referenced strains with a log reduction of >2. The sustainability of this effect was time-dependent and detected at lower temperatures (20 ± 2.5 °C) and humidity (46%) conditions for variable inoculum concentrations and contact times. The simulation of use proved the microsphere's efficiency under harsh mechanical and chemical tests. The in situ studies showed a higher than 90% reduction in CFU/25 cm2 per treated surface versus the untreated surfaces, reaching a targeted value of <50 CFU/cm2. Mineral oxide microspheres can be incorporated into unlimited surface types, including medical devices, to efficiently and sustainably prevent microbial contamination.
- Subjects
OXIDE minerals; TECHNOLOGICAL innovations; POROUS materials; ANTI-infective agents; MICROBIAL contamination; MESOPOROUS materials; MICROSPHERES
- Publication
Pharmaceutics, 2023, Vol 15, Issue 4, p1261
- ISSN
1999-4923
- Publication type
Article
- DOI
10.3390/pharmaceutics15041261