Passenger vehicle interior decontamination by low concentration hydrogen peroxide vapor following a wide area biological contamination incident.
J Appl Microbiol
; 134(3)2023 Mar 01.
Article
em En
| MEDLINE
| ID: mdl-36822624
ABSTRACT
AIMS:
To assess low concentration hydrogen peroxide (LCHP) (H2O2) vapor dispersed with a home humidifier for its ability to decontaminate vehicle interiors contaminated with Bacillus anthracis surrogate Bacillus atrophaeus spores. METHODS ANDRESULTS:
Efficacy of a vaporized 3% H2O2 solution was evaluated for liquid volumes, on/off vehicle heating, ventilation, and air conditioning (HVAC) system operations, and temperatures that ranged from 5 to 27°C. Survival of the spores was assessed by quantification of remaining viable spores with efficacy quantified in terms of mean log10 reduction. Decontamination efficacy after the 6-day dwell time increased when the 3% H2O2 liquid volume was doubled, increasing from 4-of-10 to 10-of-10 nondetects (zero colonies counted using standard dilution and filter plating) inside the vehicle cabin. Recirculating cabin air through the HVAC system during decontamination decreased efficacy to 6-of-10 non-detects. While no 6-log10 reduction in viable spores was observed on the cabin filter with the cabin filter kept in place, a 6-log10 reduction was achieved after its removal and placement in the cabin during treatment.CONCLUSIONS:
Results from this study allow for informed decisions on the use of LCHP vapor as an effective decontamination approach for vehicle interiors.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Bacillus
/
Bacillus anthracis
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article