Which enclosure feature is not typically used to reduce disease spread?

• A. Carpeted, non-cleanable walls.
• B. Ventilation
• C. Isolation of cages
• D. Cleanable surfaces

Answer: (A)

Preventing disease spread in a mouse enclosure relies on features that limit transmission routes—airborne, contact, and contaminated surfaces. Ventilation helps remove airborne particles and maintain a clean air environment, often with filtration to keep pathogens from circulating. Isolation of cages reduces cross‑contamination by preventing shared air and direct contact between groups. Cleanable surfaces are essential because smooth, non-porous materials are easy to disinfect between housing units and after any spill or exposure. In contrast, carpeted, non-cleanable walls are not used because their porous, absorbent nature makes cleaning and disinfection difficult, allowing dirt, moisture, and microbes to persist and spread.