What is a typical rationale for moving sentinel cages around the room in a microbiology facility?

• A. To ensure uniform lighting
• B. To sample airborne pathogens from different areas
• C. To minimize handling
• D. To maximize cage turnover

Answer: (B)

Moving sentinel cages around a room is about sampling airborne pathogens from different areas to get a realistic view of room air contamination. By relocating the sentinels, you expose animals to air from multiple zones, which helps detect whether aerosolized contaminants are present in different parts of the space and whether containment and filtration are effectively limiting spread. This approach gives broader, more representative surveillance than keeping cages in one fixed spot, helping identify potential hotspots and validate air-handling performance. The other options don’t fit because lighting uniformity isn’t tied to environmental monitoring, minimizing handling isn't the goal of sentinel movement, and maximizing cage turnover relates to throughput rather than monitoring airborne exposure.