ARA Develops 1st Consensus Standard for UV Surface Decontamination

Image dipicting UV Surface Decontamination

Challenge

The use of ultraviolet germicidal irradiation (UVGI) devices for killing/inactivating microorganisms on surfaces is becoming increasingly common. UVGI devices, ranging from whole-room disinfectors to small appliance-type units, are used to kill/inactivate microorganisms on surfaces. Many of these devices are used in health care settings, but currently there is no oversight by U.S. regulators. This is partly due to a lack of standard methods to validate claims. ARA helped fill this gap by developing the first ever consensus standard for evaluation of UVGI surface decontamination.

Solution

The American Society for Testing and Materials (ASTM) E35.15 subcommittee on Antimicrobial Reagents approved ARA’s work item after two years of deliberation. ASTM E3135-18, Standard Practice for: Determining Antimicrobial Efficacy of Ultraviolet Germicidal Irradiation Against Microorganisms on Carriers with Simulated Soil, provides guidance on key considerations for evaluating UVGI claims:

  • Measuring UVGI dose
  • Overview of factors influencing dose
  • Overview of UVGI terminology
  • Antimicrobial testing guidance
  • Options for addition of soiling agents
  • Overview of factors affecting UVGI antimicrobial effectiveness
  • Overview of test report requirements

Read the research

Impact

ARA is currently balloting an ASTM standard method for inactivating influenza virus on textile surfaces using UVGI. ARA recently published research using this method in the American Journal of Infection Control. ARA’s contributions in this area can also be broadly applied to other surface decontamination studies for outdoor and indoor environments as well as to air quality studies. 

Please contact Brian Heimbuch for more information. 

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