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Optimal Fast Integral Decontamination of Bacillus thuringiensis Aerosols and Fast Disinfection of Contaminated Surfaces.

José Luis Pérez-DíazTania Martín-PérezCristina Del ÁlamoJuan Sánchez-García-CasarrubiosJosé Luis Copa-PatiñoJuan SoliveriJosé M Orellana-MurianaJorge Pérez-SerranoFrancisco José Llerena-Aguilar
Published in: Microorganisms (2023)
Aerosolized anthrax ( Bacillus anthracis ) spores are of extreme health concern and can remain airborne for hours and contaminate all kinds of surfaces, constituting reservoirs from which resuspension is easily produced. The assessment of decontamination techniques must therefore consider both air and surfaces. In the present study, several kinds of disinfecting fogs were experimentally tested against Bacillus thuringiensis spores, which served as a surrogate for Bacillus anthracis , both as aerosols released into the air and spread on porous and non-porous surfaces with different positions and orientations. This technology removed Bacillus thuringiensis spores from the air in 20 min with just a 1 min application of fog. The dynamics and characteristics of the fog, related to aerosol and surface interactions, proved to be critical for optimal performance and decontamination. An optimal configuration could provide effective disinfection even on indirectly reached surfaces. In all cases, 8% hydrogen peroxide (H 2 O 2 ) provided a higher disinfection rate than 2% glutaraldehyde.
Keyphrases
  • hydrogen peroxide
  • drinking water
  • bacillus subtilis
  • biofilm formation
  • public health
  • nitric oxide
  • staphylococcus aureus
  • climate change
  • cystic fibrosis
  • highly efficient
  • metal organic framework
  • air pollution