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Cleaning and Disinfection
Overview
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Cleaning & Disinfection (C&D)
●Stop the spread of pathogens– Inactivate or destroy microorganisms
●Vital for animal health emergency situations
●Premises, equipment, vehicles, personnel
●Personnel must be knowledgeable– C&D methods, procedures, limitations– Safety issues
Just In Time Training Cleaning and Disinfection: Overview
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C&D Methods
●Reduce, remove, inactivate, destroy●Methods vary in level of destruction●Physical– Heat, UV light
●Chemical– Sanitizers– Disinfectants– Sterilants
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Disinfectant Regulation
●Registered and regulated by EPA– Federal Insecticide, Fungicide
and Rodenticide Act (FIFRA)– “Antimicrobial pesticides”
●Use in manner inconsistentwith label– Ineffective application– “Misuse” of product
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Efficacy Considerations
●Microorganism Considerations– Vary in susceptibility
●EnvironmentalConsiderations– Organic load– Water hardness– Temperature– Surface type– Other chemicals
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Basic C&D Protocol
●Cleaning– Dry Cleaning–Washing– Rinse and dry
●Disinfection– Application– Contact Time– Rinse and dry
●DowntimeJust In Time Training Cleaning and Disinfection: Overview
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Cleaning
●Importance– Can remove 90% of microorganisms– Improves disinfection efficacy– Prior to application of disinfectant
●Three steps– Dry clean–Wash– Rinse and Dry
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Cleaning: Dry Cleaning
●Removal of gross contamination– Organic material
Soil, manure, bedding, feed
●Moisten to control dust●Air blowers should not
be used– Risk of pathogen spread
●Disposal should minimize spread– Burning, burial, composting
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Cleaning: Washing
●Most overlooked step●Detergent– Reduces microorganisms– Removes oil, grease,
exudates
●Shut off, remove or cover electrical equipment– Covered tightly with plastic – Electrician may be helpful
●May need pre-soakedJust In Time Training Cleaning and Disinfection: Overview
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Cleaning and Disinfection: Overview
Cleaning: Washing
●High pressure wateris very effective– Avoid if highly
infectious or zoonotic
●Warm to hot water should be used
●Scrubbing may be necessary●Steam – Effective for cracks, crevices, pipework
Just In Time Training
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Rinse/Dry
●Rinse with cold water at low pressure●Surfaces should be inspected– No beading should occur
●Surfaces should allow to dry completely– Overnight if possible
●Fans can be helpful in drying●Do not use with zoonotic pathogens
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Disinfection
●Application– Physical
Heat, UV light
– Chemical Disinfectant
●Contact time–Most important–May need reapplication
●Rinse after contact time
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Downtime
●Free of any animals or activity
●Reduces pathogensby drying
●Time varies based on pathogen– Three times expected
incubation period
●Block of area Just In Time Training Cleaning and Disinfection: Overview
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Assessment and Planning
●Identify pathogen●Determine areas & items●Select proper disinfection method●Identify & address hazards & safety
issues●Determine personnel, equipment &
supplies needed
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Site Selection
●Adjacent to entrance points●Two scales– Small scale for
personnel/small equipment– Large scale for vehicles,
machinery
●House C&D components– Disinfection station– Water supply/waste water
containment
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Biosecurity Work Zones
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Disinfectant Preparation
●Only EPA-registered products
●Fresh solutions only– Old solutions may
have reduced efficacy
●Test kits – Determine chemical
degradation of active ingredients
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Evaluation
●Areas properly cleaned/disinfected●Personnel aware of/implementing
C&D measures●Proper disinfectant selected– Appropriate concentration– Correct contact time achieved
●C&D Waste–Minimize or avoid environmental impact
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Safety
●Chemical Hazards– Skin, eye, respiratory
irritation– Ingestion (animals)
●Physical Hazards– Slips, trips, falls– Heat injury– High pressure sprayer
●Personal ProtectiveEquipment (PPE)– Gloves, masks, eyes
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ICS: C&D Group
●Part of Operations Section of ICS– Establish C&D
protocols– Set up disinfection
stations Vehicles Equipment Personnel
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C&D Team
●C&D Group Supervisor– C&D implemented effectively– Personnel know proper procedures– Identifies team members with required
expertise
●C&D Team Leaders– Supervises on site activities
●C&D Team Members– Implement C&D procedures
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Acknowledgments
Development of this presentation was by the
Center for Food Security and Public Health at Iowa
State University through funding from the Multi-
State Partnership for Security in Agriculture
Authors: Glenda Dvorak, DVM, MPH, DACVPM; Ashley Osborn