Biohazards assessment in large-scale zonal centrifugation

Area of Science:

• Biotechnology
• Virology
• Laboratory Safety

Background:

• Large-scale zonal centrifuges are used for purifying oncogenic viruses.
• Assessing biohazards in these systems is crucial for laboratory safety.

Purpose of the Study:

• To determine potential biohazards during oncogenic virus purification using large-scale zonal centrifuges.
• To evaluate personnel exposure risks associated with centrifuge operation and malfunction.

Main Methods:

• A simulant virus, coliphage T3, was used to assess hazards in a typical processing procedure.
• Surface, liquid, and air samples were collected and assayed during processing.
• Faulty seals were employed to simulate mechanical malfunction.

Main Results:

• Minimal personnel exposure risk was observed during optimal centrifuge operation.
• Mechanical malfunctions, particularly faulty seals, demonstrated potential for virus release.
• High concentrations of the simulant virus were detected in turbine air exhaust and seal coolant systems.
• The simulant virus was also found on centrifuge chamber interior and rotor surfaces.

Conclusions:

• Large-scale zonal centrifuges pose minimal biohazard risk under optimal conditions.
• Mechanical failures can compromise containment, leading to potential virus release.
• Effective seal maintenance is critical for preventing biohazard exposure in zonal centrifugation processes.