Biological Aerosol & Public Health Air Quality Claims Testing

Element offers best-in-class virucidal efficacy testing of fogging and misting devices according to the following established methodology. Custom protocols can also be developed to meet your unique needs.

Virucidal Efficacy of a Disinfectant Applied to a Room via a Fogger or Misting Device - An aliquot of the test virus is inoculated onto the surface of a glass Petri dish (used as the test “carrier”) and the virus is dried. The inoculated carriers are placed at diverse locations within the sealed room and exposed to the test substance for a specified exposure time. Following exposure, the carriers are neutralized, and serial dilutions of the neutralized test substance are performed. The dilutions are then assayed for viral infectivity by an assay method specific for the test virus. Appropriate virus, test substance cytotoxicity, and neutralization controls are run concurrently.  

The EPA requires at least a 3 log reduction of the virus in order to claim efficacy. Connect with an expert today to explore a partnership with Element for virucidal efficacy testing of fogging and/or misting devices.

Element offers industry-leading microbiology testing of fogging and misting devices to established methods. Contact us today to explore the development of custom protocols to meet your needs.

Efficacy of a Disinfectant Applied to a Room via a Fogging, Misting or Vaporizing Device for Disinfection (bactericidal/fungicidal/tuberculocidal) - The purpose of this assay is to evaluate the efficacy of a room disinfection system applied by a fogging, misting or vaporizing device for disinfection on hard, non-porous surfaces. Inoculated glass carriers and appropriate chemical indicators or active ingredient detection probes are placed at diverse locations within the sealed room. The inoculated carriers and indicators/detection probes will be exposed to the test substance for a specified exposure time. After exposure, the carriers are transferred to vessels containing neutralizing subculture media and assayed for survivors. Appropriate culture purity, sterility, viability, initial population, carrier population, non-active treatment and neutralization confirmation controls are performed. 

Efficacy of a Sterilant Applied to a Room Via a Fogger or Misting Device - This assay determines the efficacy of a room bio-decontamination system on exposed, hard, non-porous surfaces, using a sterilant applied by a fogger or misting device in a sealed large volume enclosure. In this method, a series of glass or stainless steel surfaces inoculated with the test organism (commonly Geobacillus stearothermophilus, Clostridium difficile, Staphylococcus aureus or Pseudomonas aeruginosa) are placed at specific locations inside a customized testing room. The room is sealed, the fogging, misting or vaporizing product is allowed to treat the room and following treatment, the surfaces are removed and evaluated for survivors. Based on the desired claim and the requirements of the regulatory agency, the product must demonstrate kill on a predetermined number of carriers inoculated with test organisms applicable to the claim. The EPA typically requires the testing of 3 independent lots of test substance, one of which must have aged ≥ 60 days at the time of testing, to substantiate efficacy claims. Inoculated stainless steel carriers (biological indicators) and appropriate chemical indicators (CI), if applicable, are placed at diverse locations within the sealed room. The inoculated carriers and CIs will be exposed to the test substance for a specified exposure time. After exposure, the carriers are transferred to vessels containing neutralizing subculture media and assayed for survivors. The CIs, if used, will be visually examined and observations will be recorded. 

Efficacy of a Sanitizer Applied to a Room via a Fogging, Misting or Vaporizing Device for Non-Food Contact Sanitization - The purpose of this assay is to evaluate the efficacy of a room sanitization system applied by a fogging, misting or vaporizing device for non-food contact sanitization on hard, non-porous surfaces. Inoculated glass carriers and appropriate chemical indicators or active ingredient detection probes are placed at diverse locations within the sealed room. The inoculated carriers and indicators/detection probes will be exposed to the test substance for a specified exposure time. After exposure, the carriers are transferred to vessels containing neutralizing subculture media and assayed for survivors. Appropriate culture purity, sterility, initial population, carrier population, non-active treatment and neutralization confirmation controls are performed.  

Efficacy of a Sanitizer Applied to a Room via a Fogging, Misting or Vaporizing Device for Food Contact Sanitization - The purpose of this assay is to evaluate the efficacy of a room sanitization system applied by a fogging, misting or vaporizing device for food contact sanitization on hard, non-porous surfaces. For fogging or misting bio-decontamination devices which utilize a sanitizer, efficacy testing is performed to determine that all exposed, hard, non-porous surfaces within the enclosure are effectively sanitized. Inoculated glass carriers and appropriate chemical indicators or active ingredient detection probes are placed at diverse locations within the sealed room. The inoculated carriers and indicators/detection probes will be exposed to the test substance for a specified exposure time. After exposure, the carriers are transferred to vessels containing neutralizing subculture media and assayed for survivors. Appropriate culture purity, sterility, viability, initial population, carrier population, non-active treatment and neutralization confirmation controls are performed.