"Container" - what is it, definition of the term
The term designates a bounded enclosure constructed to hold, transport, or store items; in laboratory contexts it specifically refers to the rigid cage that secures small rodents such as rats and mice, featuring standardized dimensions, a secure lid, and a material composition that allows for cleaning, stacking, and efficient handling.
Detailed information
Enclosures designed for small rodents must meet specific criteria to ensure humane handling, effective containment, and ease of maintenance. Structural integrity is essential; walls should be constructed from durable, chew‑resistant materials such as polycarbonate or reinforced steel mesh, with seamless joints to prevent escape. Ventilation openings must provide adequate airflow while eliminating gaps larger than ¼ inch, which rodents can exploit. Transparent panels allow visual inspection without disturbing the occupants, reducing stress and facilitating health monitoring.
Environmental control features include removable flooring for cleaning, sealed access ports for feeding and watering, and optional temperature regulation modules. Feeding stations should be positioned to prevent spillage, and water dispensers must be leak‑proof to avoid moisture buildup that can promote mold growth. Soft bedding material, placed on a removable tray, supports natural nesting behavior and simplifies waste removal.
Safety considerations extend to the surrounding laboratory or facility. Enclosures should be compatible with standard rack systems, allowing secure stacking and efficient use of space. Locking mechanisms must be tamper‑proof, with key‑controlled or electronic access to restrict unauthorized handling. When transporting rodents, secondary containment crates provide an additional barrier, featuring shock‑absorbing interiors and clear labeling for species identification.
Key attributes of an effective rodent housing unit:
- Durability: Materials resist gnawing and corrosion.
- Ventilation: Air exchange meets respiratory health standards.
- Accessibility: Doors and ports enable quick cleaning and animal care.
- Modularity: Components fit standard racks and can be reconfigured.
- Security: Locks prevent accidental release and unauthorized entry.
Proper selection and maintenance of these housing solutions support ethical research practices, reduce the risk of cross‑contamination, and promote the welfare of rats and mice throughout experimental procedures.