Which procedure is prohibited when handling potentially infectious samples?

Vortexing open tubes is prohibited when handling potentially infectious samples because this action can aerosolize the contents, creating a risk of exposure to pathogens. When samples contain infectious agents, opening them and agitating them with a vortex can lead to droplets being released into the air. This not only endangers the person performing the procedure but also anyone else in the vicinity. Proper safety practices dictate that potentially infectious samples should always be handled in a way that minimizes the risk of exposure, such as using closed containers or conducting procedures within a biological safety cabinet.

In contrast, using a biological safety cabinet provides a controlled environment designed to protect the operator and the environment from exposure to harmful agents. Wearing gloves is essential personal protective equipment that helps prevent direct contact with potentially infectious materials. Correctly labeling samples is fundamental for maintaining safety and traceability, ensuring that all personnel are aware of the hazards associated with the samples they handle.