Related Experiment Video
Updated: Jun 19, 2026
Automated Hospital Room Disinfection Utilizing a Novel Aerosolized Hydrogen Peroxide Microdroplet Disbursing Technology
Published on: February 24, 2026
Fast, broad-range disinfection of bacteria, fungi, viruses and prions
Michael Beekes1, Karin Lemmer, Achim Thomzig
1P24, Transmissible Spongiform Encephalopathies, Robert Koch-Institut, Nordufer 20, 13353 Berlin, Germany. BeekesM@rki.de
Abstract:
Effective disinfectants are of key importance for the safe handling and reprocessing of surgical instruments. This study tested whether new formulations containing SDS, NaOH and 1-propanol (n-propanol) are simultaneously active against a broad range of pathogens including bacteria, fungi, non-enveloped viruses and prions. Inactivation and disinfection were examined in suspension and on carriers, using coagulated blood or brain homogenate as an organic contaminant. Coomassie blue staining was used to assess whether the formulations undesirably fixed proteins to rough surfaces. A mixture of 0.2 % SDS and 0.3 % NaOH in 20 % n-propanol achieved potent decontamination of steel carriers contaminated with PrP(TSE), the biochemical marker for prion infectivity, from 263K scrapie hamsters or from patients with sporadic or variant Creutzfeldt-Jakob disease. 263K scrapie infectivity on carriers was decreased by > or =5.5 logs. Furthermore, the formulation effectively inactivated poliovirus, hepatitis A virus and caliciviruses (including murine norovirus) in suspension tests. It also yielded significant titre reductions of bacteria (Enterococcus faecium, Mycobacterium avium; >6 logs), fungi (spores of Aspergillus niger; > or =5 logs) and poliovirus (>4 logs) embedded in coagulated blood on carriers. The formulation was not found to fix proteins more than was observed with water as the cleaning reagent. In conclusion, SDS, NaOH and n-propanol can synergistically achieve fast, broad-range disinfection.
Insights
New disinfectant formulations containing SDS, NaOH, and n-propanol show potent activity against diverse pathogens, including prions, bacteria, fungi, and viruses. This broad-spectrum efficacy ensures effective reprocessing of surgical instruments and safe handling of medical devices.
Area of Science:
- Microbiology
- Infectious Diseases
- Biochemistry
Background:
- Effective disinfectants are crucial for surgical instrument reprocessing and safe medical practices.
- A broad spectrum of antimicrobial and antiviral activity is required for comprehensive pathogen control.
Purpose of the Study:
- To evaluate new disinfectant formulations containing sodium dodecyl sulfate (SDS), sodium hydroxide (NaOH), and 1-propanol (n-propanol).
- To assess their efficacy against a wide range of pathogens, including bacteria, fungi, viruses, and prions, under various contamination conditions.
Main Methods:
- Disinfection and inactivation tests were performed in suspension and on contaminated carriers (steel).
- Organic contaminants like coagulated blood and brain homogenate were used to simulate real-world conditions.
- Coomassie blue staining assessed protein fixation to surfaces.
Main Results:
- A mixture of 0.2% SDS, 0.3% NaOH, and 20% n-propanol effectively decontaminated prion-contaminated carriers (PrP(TSE)), reducing infectivity by over 5.5 logs.
- The formulation inactivated non-enveloped viruses (poliovirus, hepatitis A, norovirus) in suspension.
- Significant reductions in bacteria (>6 logs), fungi (>5 logs), and poliovirus (>4 logs) were observed on carriers with organic load.
- No significant protein fixation was observed compared to water.
Conclusions:
- SDS, NaOH, and n-propanol exhibit synergistic disinfectant properties.
- This formulation provides fast, broad-spectrum disinfection suitable for surgical instrument reprocessing.
- The disinfectant is effective against challenging pathogens like prions and resistant bacteria, even in the presence of organic matter.
Related Concept Videos
01:26Physical Methods for Controlling Microbial Growth: Radiation and Filtration
01:27Chemical Agents for Microbial Control
01:30Cleaning, Sterilization, and Disinfection
Cleaning
The cleaning process usually involves using water with detergents or enzymatic cleaner and removing foreign material from objects and surfaces, including organic material such as body fluids or inorganic material like soil. Cleaning is performed before high-level disinfection and sterilization because foreign materials on the cover of the devices interfere with process...
01:29Methods of Sterilization I: Physical Methods
Steam sterilization uses non-toxic, low-cost moist heat in the form of saturated steam under pressure, which is fast, microbicidal, and sporicidal, and quickly warms and penetrates fabrics. Autoclaves, or steam sterilizers, expose each item to direct steam contact for a predetermined time at the necessary...
01:23Hand hygiene
Hand washing...
01:25Rapid Identification of Pathogens