Housekeeping Tasks and Contamination Control in an Animal ...
Transcript of Housekeeping Tasks and Contamination Control in an Animal ...
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8
Housekeeping Tasks and Contamination Control in an
Animal Facility
Dianne Harrison, Supervisor QA Lab
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8
Microorganisms
Invisible to the naked eye Need a microscope to
see Most common we deal with? Bacteria, Virus, Fungi,
Protozoa
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8
What are PATHOGENS? Microorganisms that can cause disease
• Pathogens can survive in a host or for long periods outside the body on surfaces
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8 What are pathogens that have a tough outer covering to survive hazardous environments? Spores
Some characteristics of spores
Difficult to kill Highly resistant to: Dryness Chemicals Heat
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8 What are the three processes used to either remove or kill microorganisms? ♦ Sanitization ♦ Disinfection ♦ Sterilization
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8
What is wrong with this picture?
Always wear proper PPE • Eye protection • Plastic Apron to protect
clothing • Chemical resistant or
heat resistant gloves
Where are her gloves?
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8 What guidelines do you follow when preparing chemical solutions from stock bottles? Follow Instructions on Bottle or SOP
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8 Be careful in mixing chemicals. Can deactivate chemicals Can cause toxic compound and fumes Hazardous to animals and staff Contents can splash
Normally Clorox does not foam
Glug, Glug, Glug
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8
3 things to remember about chemical storage If transferred to another container, clearly label with the name, the date, and any other significant information. Never use unlabeled containers Always read label first – containers look similar
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8
What is the Material Safety Data Sheet (MSDS) used for?
It will provide the information on how to safely
handle and work with a substance
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8
What does the process of Sanitation do?
Reduce the number of microorganisms to an acceptable level
It important to remove organic matter? May inactivate the chemical
used May shield microorganisms
from contact
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8
What is the sanitation cleaning process?
Remove dirt, hair, dust, saliva, blood, feces, and urine from surfaces.
Wash with detergents Rinse with a chemical sanitizer or water at 180 °F
(82 °C).
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8 What is the process that destroys microorganisms or inhibits their growth or activity? Disinfection They are classified by Whether they kill or inhibit growth of organism
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8
What do the suffix's “stat” or “-static” mean when added to a word? Inhibit growth And what is it when it is written “-cide” or “-cidal” Kill
What is important when working with Spores? Resistant to many chemicals and difficult to kill. Only sporicidal will actually kill spores.
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8
When choosing a disinfectant: • What- Pathogen to be disinfected? virus, bacteria,
spores • Where- Item to be disinfected? Floor, food bowl
• How- Ease of use? Does it need to sit for long
periods (contact time)
• Cost of the disinfectant? ↑cost not always best Not always an issue with ULAR
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8
One other – what else does it hurt or kill? What species does it affect.
• Some chemicals are not used with certain animals • Ex. Phenols (Lysol and Pine Sol) with birds, cats,
reptiles
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8
What are some common disinfectants? Bleach- Sodium hypochlorite (most often used) Does not loosen dirt – need to do that first
Quaternary ammonium compounds- NPD selectively effective mixing w/ detergents reduces it disinfectant ability
Isopropyl alcohol The main disadvantages are that it is flammable, and cannot be diluted
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8
What does Sterilization do? Destroys all microorganisms on, and sometimes
inside, an object
What is the Best method to use? Autoclave/Sterilizer
This is a closed system that uses high steam
pressure and high temperatures for a selected period of time.
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8
Alternative methods of sterilization Irradiation, dry heat sterilization Ethylene oxide or hydrogen peroxide gas
sterilizers chemical ( cold) sterilization
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Laboratory Animal Care and Use Program and Facilities
Cleaning Animal Rooms and Equipment
Frequency: OVERALL - Must be regularly cleaned and sanitized to maintain an appropriate environment and minimize the potential for contamination. Who sets the schedule of cleaning?
The supervisor or facility manager OR
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Laboratory Animal Care and Use Program and Facilities
Cleaning Animal Rooms and Equipment
STEPS: Appropriate chemicals used Sanitation logs followed and signed Monitoring of sanitation process 1. Visually 2. Testing the effects of equipment cleaning should be documented RODAC Plates and ATP Swabs
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Laboratory Animal Care and Use Program and Facilities
Cleaning Animal Rooms and Equipment
Preparation
• Follow the established room order for cleaning. 1-6 • Proper PPE must be worn for cleaning tasks
Hearing protection too. • Foot baths may be used as part of decontamination
procedures.
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Laboratory Animal Care and Use Program and Facilities
Cleaning Animal Rooms and Equipment
Tasks • Clean caging according to required times set BE CAREFUL TO REMOVE ANIMALS BEFORE CLEANING What must be cleaned on a regular schedule? Walls, ceilings, lights, and other exposed surfaces (floors) Why do you clean room vents? clogged vents reduce air circulation, which can affect animal
health. How should mops be stored? Hanging upside down to dry
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Laboratory Animal Care and Use Program and Facilities
Cleaning Animal Rooms and Equipment
According to the ________cages should be changed often enough “to provide a healthy environment for an animal, according to its normal behavior and Physiological characteristics The GUIDE
What sets the frequency of cleaning and the # of animals housed in a cage? Species Cage size/type Type of bedding
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Laboratory Animal Care and Use Program and Facilities
ALAT Chapter 8
Why do we autoclave some supplies such as cage setups , enrichment items and water bottles? They are being used in a pathogen free area What animals require daily bedding replacement and cleaning? • swine, • small ruminants, • dogs, • cats, and • nonhuman primates
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Laboratory Animal Care and Use Program and Facilities
Cage Wash
Who sets the minimum cleaning standards for large animal caging? AWR What does AWR stand for? Animal Welfare Regulation Why do you use Descalers for in cage wash? Help remove urine scale What do you do with feeders and dishes after they have been scraped? Soak in disinfectant
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Laboratory Animal Care and Use Program and Facilities
Cage Wash
What is a problem with this type of equipment?
IF there is even the slightest deviation on positioning the robot will cease to operate
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Laboratory Animal Care and Use Program and Facilities
Cage Wash
Water bottles – what may you have to do to get them clean? Soak How do you make sure the automatic watering systems are cleaned in a rack? Flush them at the station after they have been
washed.
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Laboratory Animal Care and Use Program and Facilities
Monitoring Sanitation
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Laboratory Animal Care and Use Program and Facilities
Monitoring Sanitation
• RODAC Plates and ATP Swabs
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Laboratory Animal Care and Use Program and Facilities
Monitoring Sanitation Monitoring of cage wash operations typically includes which of the following? Presence of bacteria on surfaces before cleaning
cages Cage wash water temperature Presence of bacteria on surfaces of cages during
the wash cycle Presence of bacteria on surfaces of cleaned
cages
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Laboratory Animal Care and Use Program and Facilities
Waste management What are the two types of waste? General and Hazardous Why do we handle each differently Potential pathogens and aesthetics Who handles radioactive hazardous waste? trained personnel What is difference in how general waste and hazardous waste are disposed of? Haz- labeled, stored separate, picked up and and
rendered safe
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Laboratory Animal Care and Use Program and Facilities
Waste Management Who coordinates the disposal of hazardous waste? Facility EHS Are carcasses hazardous waste? Yes, biological waste, potentially hazardous
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Laboratory Animal Care and Use Program and Facilities
Pest Control Why do we have pest control? Carry Infectious parasites How do pest enter the building? Feed, bedding, humans and other animals, cracks
and small openings in building How do we prevent them? Good housekeeping program and proper waste
management
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Laboratory Animal Care and Use Program and Facilities
Pest Control What are parts of a good pest control system? • Examine all feed and bedding shipments • Keep areas clean • Properly storing and disposing of feed and bedding • Keep exterior doors and windows closed • Sealing cracks • Capture all wild rodents that enter the facility, remove and possibly test for pathogens
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Laboratory Animal Care and Use Program and Facilities
Pest Control Who can apply pesticides? Skilled and experienced personnel What is the main concern with using pesticides? They must not be allowed to come in contact with
the animals and all that involves What chemicals are normally used? Boric acid and Amorphous silica
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Laboratory Animal Care and Use Program and Facilities
LAST QUESTION
How do I know you will pass this portion of the ALAT exams? ITS YOUR JOB AND YOU DO IT EVERY DAY