ALAT - Assistant Laboratory Animal Technician Facility Environment and Management Questions and Answers — Questions and Answers
Question 1: A research facility is designing a room to house immunocompromised animals. To prevent contaminants from entering the room and protecting the animals, what type of air pressure should the room have relative to the adjacent corridor?
- Negative pressure
- Positive pressure (Correct answer)
- Neutral pressure
- Variable pressure
Correct answer: Positive pressure
Positive pressure rooms have a higher air pressure than the surrounding areas. This causes air to flow out of the room when a door is opened, preventing airborne contaminants from entering and protecting the vulnerable animals inside.
Question 2: Which of the following BEST describes the 'microenvironment' in a laboratory animal facility?
- The animal housing room, including its temperature, humidity, and ventilation.
- The physical environment within the primary enclosure, such as the cage or pen. (Correct answer)
- The entire animal facility building and its HVAC system.
- The outdoor conditions surrounding the research facility.
Correct answer: The physical environment within the primary enclosure, such as the cage or pen.
The microenvironment refers to the immediate physical environment within the animal's primary enclosure (the cage, pen, or stall). This is distinct from the macroenvironment, which is the environment of the secondary enclosure, like the room itself.
Question 3: A technician is cleaning a rodent cage that has just been vacated. The first step involves removing all bedding, feed, and organic debris. What is this initial process called?
- Disinfection
- Sterilization
- Sanitation
- Cleaning (Correct answer)
Correct answer: Cleaning
Cleaning is the essential first step in the sanitation process and involves the physical removal of organic material like feces, urine, and bedding. Disinfection, the process of killing pathogens, is performed after the surface has been thoroughly cleaned.
Question 4: The 'Guide for the Care and Use of Laboratory Animals' recommends a ventilation rate for secondary enclosures (animal rooms) of how many fresh air changes per hour?
- 1-5
- 5-10
- 10-15 (Correct answer)
- 20-25
Correct answer: 10-15
The 'Guide for the Care and Use of Laboratory Animals' has historically considered 10-15 air changes per hour (ACH) as an acceptable general standard for animal rooms to maintain air quality and control temperature and humidity.
Question 5: An animal technician notices a wild mouse in the facility's feed storage room. According to a proper integrated pest management (IPM) program, what should be the technician's FIRST action?
- Immediately place several bait stations in the area.
- Report the sighting to their supervisor or the designated pest control contact. (Correct answer)
- Attempt to capture the mouse using available materials.
- Ignore the single mouse as it is likely an isolated incident.
Correct answer: Report the sighting to their supervisor or the designated pest control contact.
In an integrated pest management (IPM) program, it is crucial to report any pest sightings to a supervisor. This allows for proper documentation, investigation of entry points, and implementation of a strategic and approved control plan, rather than taking uncoordinated action.
Question 6: Which of the following environmental factors is NOT considered part of the animal's macroenvironment?
- The concentration of ammonia inside a static mouse cage. (Correct answer)
- The temperature of the animal housing room.
- The light cycle (photoperiod) in the room.
- The relative humidity of the room.
Correct answer: The concentration of ammonia inside a static mouse cage.
The macroenvironment consists of the physical conditions of the secondary enclosure, such as the room's temperature, humidity, and lighting. The ammonia concentration inside a specific cage is a component of the animal's microenvironment, as it is the immediate air the animal breathes.
ALAT - Assistant Laboratory Animal Technician Facility Environment and Management Questions and Answers
A research facility is designing a room to house immunocompromised animals.
To prevent contaminants from entering the room and protecting the animals, what type of air pressure should the room have relative to the adjacent corridor?