Ozone gas is an effective and practical antibacterial agent

Area of Science:

• Microbiology
• Environmental Science
• Public Health

Background:

• Bacterial infections and epidemics are frequent in institutional settings.
• Current surface decontamination methods are insufficient.
• A need exists for simple, effective, and safe decontamination strategies.

Purpose of the Study:

• To evaluate the efficacy of a portable ozone-generating machine for bacterial inactivation.
• To assess the machine's performance under laboratory and simulated field conditions.

Main Methods:

• Tested a portable ozone generator with a catalytic converter and humidifier.
• Evaluated inactivation of 15 medically important bacterial species.
• Applied an ozone dosage of 25 ppm for 20 minutes with >90% relative humidity.

Main Results:

• Ozone inactivated >3 log(10) CFU of most tested bacteria, including Acinetobacter baumannii, Clostridium difficile, and methicillin-resistant Staphylococcus aureus.
• Complete bacterial eradication was achieved in many instances.
• Both dried and wet bacterial samples on various surfaces (plastic, fabric, paper) were equally susceptible to ozone.

Conclusions:

• The ozone generator is a valuable tool for bacterial decontamination.
• It is suitable for use in hospitals and other healthcare institutions.
• This technology can help control bacterial spread in communal settings.