Which statement accurately characterizes ABSL-3 or higher levels?

Which statement accurately characterizes ABSL-3 or higher levels?

• A. ABSL-3 and higher are used for agents that cause serious or potentially lethal diseases when inhaled.
• B. ABSL-1 is for such agents.
• C. ABSL-2 is for such agents.
• D. ABSL-4 only is for such agents.

Answer: (A)

Containment levels for biosafety rise with the risk of infection and the potential for airborne transmission. ABSL-3 and higher are designated for agents that can cause serious or potentially lethal disease when inhaled, so work in these levels requires strict controls to prevent exposure. This includes specialized engineering controls like negative pressure rooms with HEPA filtration, biological safety cabinets, controlled worker entry and exit, and stringent PPE and decontamination procedures. ABSL-1 is for minimal-risk work with well-characterized, non-pathogenic organisms. ABSL-2 covers agents that pose a moderate risk and may cause disease in healthy adults, with standard PPE and practices plus some precautions. ABSL-4 represents the highest level of containment for the most dangerous agents, often with no available treatments, and is not the only level used for inhalation-risk pathogens. So the statement that ABSL-3 and higher are used for agents that cause serious or potentially lethal disease when inhaled correctly captures the intended concept.

Containment levels for biosafety rise with the risk of infection and the potential for airborne transmission. ABSL-3 and higher are designated for agents that can cause serious or potentially lethal disease when inhaled, so work in these levels requires strict controls to prevent exposure. This includes specialized engineering controls like negative pressure rooms with HEPA filtration, biological safety cabinets, controlled worker entry and exit, and stringent PPE and decontamination procedures.

ABSL-1 is for minimal-risk work with well-characterized, non-pathogenic organisms. ABSL-2 covers agents that pose a moderate risk and may cause disease in healthy adults, with standard PPE and practices plus some precautions. ABSL-4 represents the highest level of containment for the most dangerous agents, often with no available treatments, and is not the only level used for inhalation-risk pathogens.

So the statement that ABSL-3 and higher are used for agents that cause serious or potentially lethal disease when inhaled correctly captures the intended concept.