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Testing Guidance for Antimicrobials against Biofilm Bacteria (August 2017)

EPA recently issued two new testing methods (MB-19 and MB-20) that can be used to evaluate the effectiveness of antimicrobial pesticides against biofilm bacteria Pseudomonas aeruginosa and Staphylococcus aureus. These new testing guidance methods will provide a structure for company registrants that wish to claim that their antimicrobial products control these bacteria on hard, non-porous surfaces like those found in healthcare settings.

These guidance methods were developed after EPA solicited and reviewed public comments from proposed regulatory guidance in October 2016 and closely worked with ASTM International, a standard setting organization.

The Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) requires that every antimicrobial product making public health claims provide data proving its effectiveness to EPA. More information regarding the EPA’s analytical method and procedures for pesticides can be found here.

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