Evaluating the Virucidal Activity of Disinfectants According to European Union Standards

Area of Science:

• Infection Control
• Microbiology
• Public Health

Background:

• Surface disinfection is vital for preventing viral infections, including SARS-CoV-2, in medical settings.
• Current laboratory methods often use suspension tests, which do not accurately represent real-world surface contamination scenarios.
• There is a need for testing methods that better simulate clinical practice for evaluating disinfectant efficacy.

Purpose of the Study:

• To review and summarize methods for assessing the virucidal activity of chemical disinfectants used in healthcare facilities.
• To highlight the importance of carrier methods in evaluating disinfectant performance under more realistic conditions.
• To discuss these methods in the context of current European standards for disinfectants, including activity against coronaviruses.

Main Methods:

• The article summarizes existing methodologies for evaluating virucidal activity.
• It contrasts traditional suspension-based assays with carrier methods.
• Carrier methods involve drying microorganisms onto surfaces (e.g., stainless steel, glass, PVC) before disinfectant application.

Main Results:

• Carrier methods provide a more accurate simulation of real-life surface disinfection challenges in clinical environments compared to suspension tests.
• These methods are essential for robustly assessing the efficacy of disinfectants against viruses, including coronaviruses.
• European standards are increasingly incorporating or recommending such realistic testing approaches.

Conclusions:

• Evaluating disinfectant virucidal activity using carrier methods is crucial for effective infection control in medical facilities.
• These methods offer a more reliable assessment of disinfectant performance against viruses like SARS-CoV-2 under clinically relevant conditions.
• Adherence to updated European standards employing realistic testing is recommended for ensuring disinfectant efficacy.