Cleaning and Disinfection C&D Disinfectants Adapted from the FAD PReP/NAHEMS Guidelines: Cleaning and Disinfection (2014)

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Presentation transcript:

Cleaning and Disinfection C&D Disinfectants Adapted from the FAD PReP/NAHEMS Guidelines: Cleaning and Disinfection (2014)

Classes of Chemical Disinfectants for C&D Operations 2

Chemical – USDA APHIS will determine which disinfectants are to be used – Inactivates a wide variety of microorganisms – not all – Chemical disinfectant classes – Selection on characteristics, efficacy, and hazards USDA APHIS and CFSPHFAD PReP/NAHEMS Guidelines: Cleaning and Disinfection - Disinfectants Chemical Disinfection 3

Chemical Disinfectants Classes Acids Alcohols Aldehydes Alkali agents Biguanides Halogen-based compounds Oxidizing/peroxide- based compounds Phenols Quaternary ammonium compounds USDA APHIS and CFSPH FAD PReP/NAHEMS Guidelines: Cleaning and Disinfection - Disinfectants 4

Acids – Inorganic and organic – Alters pH – bactericidal below 3 – Hazardous and corrosive Alcohols – Ethanol and Isopropanol – Hand sanitizers, small items – Evaporate quickly and highly flammable USDA APHIS and CFSPHFAD PReP/NAHEMS Guidelines: Cleaning and Disinfection - Disinfectants Chemical Disinfectants 5

Aldehydes – Formaldehyde and glutaraldehyde – Toxic at high concentrations Alkali agents – Sodium/calcium hydroxide, sodium carbonate, and calcium oxide Biguanides – Antiseptic (chlorhexidine) – Toxic to fish USDA APHIS and CFSPHFAD PReP/NAHEMS Guidelines: Cleaning and Disinfection - Disinfectants Chemical Disinfectants 6

Halogen-based compounds – Chlorine or iodine (bleach) – Broad spectrum – Avoid forming toxic gasses Oxidizing/peroxide-based compounds – Hydrogen peroxide and others – Virkon®S (footbaths) USDA APHIS and CFSPHFAD PReP/NAHEMS Guidelines: Cleaning and Disinfection - Disinfectants Chemical Disinfectants 7

Phenols – Among oldest disinfectants – Broad spectrum (i.e., Mycobacteria) Quaternary ammonium compounds – Several “generations” of products – Vary in composition and performance – Corrosive and irritating at higher concentrations USDA APHIS and CFSPHFAD PReP/NAHEMS Guidelines: Cleaning and Disinfection - Disinfectants Chemical Disinfectants 8

Chemical disinfectants regulated by the U.S. EPA – Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) Chemical disinfectants considered “antimicrobial pesticides” Pesticides must be registered – Novel pathogens FIFRA exemption possible USDA APHIS and CFSPHFAD PReP/NAHEMS Guidelines: Cleaning and Disinfection - Disinfectants Disinfectant Regulation 9

Characteristics of the microorganism – Susceptibility and persistence Disinfection methods – Efficacy under specific conditions Environmental factors Material composition/area – Organic load, temps, water hardness USDA APHIS and CFSPHFAD PReP/NAHEMS Guidelines: Cleaning and Disinfection - Disinfectants Factors to Consider 10

FAD PReP/NAHEMS Guidelines & SOP: Cleaning and Disinfection – Cleaning and Disinfection web- based training module – USDA APHIS and CFSPHFAD PReP/NAHEMS Guidelines: Cleaning and Disinfection - Disinfectants For More Information 11

Author (CFSPH) Glenda Dvorak, DVM, MS, MPH, DACVPM Nichollette Rider, Junior Veterinary Student Reviewers (USDA) Nathan G. Birnbaum, DVM Samantha B. Floyd, Biologist USDA APHIS and CFSPHFAD PReP/NAHEMS Guidelines: Cleaning and Disinfection - Disinfectants Guidelines Content 12

Acknowledgments Development of this presentation was by the Center for Food Security and Public Health at Iowa State University through funding from the USDA APHIS Veterinary Services PPT Author: Janice Mogan, DVM Reviewers: Glenda Dvorak, DVM, MPH, DACVPM; Patricia Futoma, Veterinary Student