Developers, manufacturers and marketers of residual products that provide bactericidal efficacy for days, weeks or months must meet the criteria detailed with EPA guidance for making bactericidal claims. °Ä²Ê¿ª½±½á¹û’s antimicrobial testing experts offer comprehensive residual bacterial efficacy testing services and can help you meet regulatory expectations and requirements for residual product registration.

Residual products may be in the form of a coating on a surface or imbedded into a surface. These products can provide additional disinfection or sanitization between regular disinfection or cleaning cycles. Residual products are desired in areas like public transportation where the surfaces are touched many times between cleaning and disinfection cycles. The US EPA recently released for bactericidal efficacy testing and criteria for making bactericidal claims for residual products. Generate data to support bactericidal claims that meets the EPA’s requirements with °Ä²Ê¿ª½±½á¹û’s antimicrobial residual efficacy testing services.

Residual bactericidal efficacy test methods

°Ä²Ê¿ª½±½á¹û’s antimicrobial experts test residual products for bactericidal efficacy to a wide range of established methodology. If you don't see the method you're interested in, please reach out to us today. We have decades of experience developing custom protocols and testing products to a variety of established methods. Our microbiologists and virologists are experts in their field and can help develop a protocol that meets your specific needs.

Residual Self-Sanitizing Efficacy Screen - The purpose of this study is to determine basic self-sanitizing activity of antimicrobial products applied to hard, nonporous, inanimate, non-food contact surfaces following exposure. This method applies to products intended for use on inanimate, nonporous, non-food contact hard surfaces for the evaluation of residual antimicrobial efficacy. These products may be sprayed or applied by other means as specified by the Sponsor.

EPA Residual Self-Sanitizing Activity of Dried Chemical Residues on Hard, Non-Porous Surfaces (with exposure and wear activity) - In this method, a series of glass or stainless-steel surfaces are treated with the product and the product is allowed to dry over the surfaces. The treated surfaces then undergo a series of physical wear procedures followed by systematic low-level inoculation of test organism to simulate routine use and contamination of the surface. After completion of the wear cycles, the treated surfaces are inoculated with the test organism to evaluate the residual sanitizing efficacy of the surface and the survivors are quantitatively assayed. The resulting plates are incubated, enumerated and a percent and log10 reduction is determined as compared to a population control.

In order to successfully demonstrate residual self-sanitizing efficacy, the product must demonstrate a 99.9% reduction after 24 hours following application. Typical test organisms include Staphylococcus aureus and Klebsiella aerogenes or Klebsiella pneumoniae. Additional pathogens of clinical, occupational or household relevance are often tested as well.

Test Method for Determining the Efficacy of Antimicrobial Surface Coatings - The purpose of this study is to provide data to support the registration of coatings applied to surfaces that are intended to provide residual long lasting antimicrobial activity for a period of weeks and are designed to be