What biosafety level is typically recommended for handling poliovirus samples?

• A. BSL-1
• B. BSL-3
• C. BSL-2 with enhanced containment
• D. BSL-4

Answer: (C)

Poliovirus is managed at a level that balances safety with practicality because it can cause disease in humans and is transmitted by the fecal-oral route, with potential aerosols during lab work. This makes a safe, multi-layered approach essential without resorting to the highest containment. That’s why the typical choice is BSL-2 with enhanced containment.

BSL-2 provides the basic safeguarding against exposure, including controlled access and standard PPE. Enhanced containment adds extra precautions for procedures that might generate aerosols or splashes: work done inside a certified biological safety cabinet, more stringent PPE and engineering controls, strict decontamination of surfaces and waste, and restricted access and health monitoring as required by the institution.

Choosing BSL-1 would be insufficient because it’s designed for nonpathogenic organisms with minimal risk. Higher levels like BSL-3 or BSL-4 are reserved for agents with greater mortality or transmission risk or for significantly more dangerous procedures; poliovirus typically doesn’t require that extreme containment for standard research or diagnostic work.