Animal Disease Response Training

Animal Disease Response TrainingCleaning and Disinfection

August 2010

AWR 206-1

Animal Disease Response Training

Scope Statement

This lesson details the requirements for managing the cleaning and disinfecting (C&D) operations for an animal disease response including initial site assessment, required resources, procedures, and the associated health, safety and biosecurity challenges.

Animal Disease Response Training

Terminal Learning Objective

Describe appropriate cleaning and disinfecting (C&D) procedures for people, vehicles, equipment and property.

Animal Disease Response Training

Enabling Learning Objectives

5-1 Explain the purpose of cleaning and disinfecting.

5-2 Describe the processes of cleaning and disinfecting of premises and equipment.

5-3 List the safety issues associated with performing cleaning and disinfecting procedures.

Animal Disease Response Training

Why do we clean and disinfect?

• Prevent spread of infection

• Prevent recurrence of infection

• Process occurs during entire incident from discovery through recovery

Animal Disease Response Training

Cleaning and Disinfecting

• Responders may be involved with cleaning activities on premises, in buildings, pens and enclosures.

• Rinseates and runoff should be contained and disposed of according to EPA treatment technologies.

Animal Disease Response Training

What are the basic steps?

• Remove all visible gross contaminants

• Apply detergent to surface and allow time to disperse

• Rinse the surface thoroughly• Apply an EPA registered

disinfectant to inactivate disease agents

Animal Disease Response Training

Cleaning• Purpose of cleaning process is to remove all manure, dirt,

and other organic material increasing the effectiveness of disinfectants

• Four basic steps:– Dry cleaning– Wet wash– Rinse– Dry

Animal Disease Response Training

Dry Cleaning• A shovel or broom should be used to remove all

organic matter such as straw, manure, dirt, dust or any other large particles

Animal Disease Response Training

Wet Wash

• Efficiency of wet wash depends on:– Concentration of cleaning agent– Temperature– Contact time– Hardness of water

Animal Disease Response Training

Rinse

• Residual detergent left on surfaces will reduce effectiveness of applied disinfectants

• Important to use adequate amount of water

Animal Disease Response Training

Dry

• A dry surface ensures the disinfectant will adhere and increases the contact time and efficacy

• Drying time can be reduced by using fans or other blowing equipment

• Hand drying should be avoided

Animal Disease Response Training

Disinfectants• Recommended by animal health officials• Decision will be based upon variety of factors:

– Disease present– Available application methods– Contact time required– Ambient temperature– Water hardness– Organic matter– Health & safety issues– Environmental impact

Animal Disease Response Training

Personnel, Vehicles and Property

• Stations are important in controlling the cleaning and disinfecting process

• Vital to the success of the disease suppression effort

Animal Disease Response Training

Cleaning and Disinfecting Station• Arranged near access and exit points• Easily disinfected and allow for future expansion• Preferably established on hard surfaces• Include a water supply, containment measures and shelter

Animal Disease Response Training

Personnel

• Personnel leaving an infected premises can transport disease on their clothing, boots, hands, and respiratory track

• Contamination can occur when:– Physical contact with infected animals– Animals are euthanized– Disposing of carcasses– Removing manure, bedding, and debris

Animal Disease Response Training

Multi-Personnel C&D Station

• Similar to conventional HazMat decontamination line

• Requires a dressed team to assist personnel leaving the infected zone

• Best performed by using the buddy system

Animal Disease Response Training

Contaminated Clothing and Equipment

• Disposable items are placed in heavy gauge plastic bags• Outside sprayed with disinfectant• Disposal may include burial or incineration

Animal Disease Response Training

Other Personnel on Site

• Anyone on a premises, suspected or confirmed with a disease, must remain until they undergo cleaning and disinfecting procedures.

Animal Disease Response Training

Vehicles• All vehicles must complete C&D before entering and

leaving a premises

• All hard to reach areas must be addressed:– Wheels– Mud flaps– Undercarriage– Foot wells and mats

Animal Disease Response Training

Premises Cleaning and Disinfecting

• After animals have been euthanized and disposed, the premises must be thoroughly cleaned and disinfected before restocking of animals.

Animal Disease Response Training

Premises Cleaning• Manual removal of bedding, manure, feeders, etc.• Must be cleaned down to original surface• Porous building materials may be destroyed• Capture rinseate water for treatment

Animal Disease Response Training

Premises Disinfection

• Use disease specific EPA registered disinfectant

• Thoroughly wet surface, allow proper contact time

• May be repeated a second time

• If ineffective the first time, a different contractor may be used

Animal Disease Response Training

Disease Free Status and Restocking• Sentinel animals monitored for incubation periods• Repeated C&D if sentinel animals fall ill• Restocking only if disease free status has been achieved

Animal Disease Response Training

Accident Cases from an IP or CP

• Human health, life and safety takes precedence

• If risk of contamination exists, Incident Command and hospital authorities must be informed of disease agent

• Ambulance should remain outside the infected zone

Animal Disease Response Training

C and D Safety Considerations

• Electricity• Machinery/vehicles• Enclosed tanks, silos, pits• Disinfectants, detergents,

surfactants, soap • High pressure sprayers• Dust

Animal Disease Response Training

C and D Safety Considerations• Ammonia

• Asbestos

• Walking and working surfaces

• Chemicals and explosive material

– Gasoline, diesel fuel, propane, agricultural chemicals:

• Fertilizer

• Herbicides

• Pesticides

Animal Disease Response Training

Summary

Proper and thorough cleaning and disinfecting are critical for the containment, control, and eradication of an animal disease. Responders must wear PPE appropriate for the task they are performing to ensure personal safety and maintain biosecurity procedures.