What precautionary measure should visitors be advised to take when entering the room of a client with airborne transmission precautions?

When entering the room of a client with airborne transmission precautions, it is essential for visitors to wear a particulate respirator mask. This type of mask, such as an N95 respirator, is specifically designed to filter out airborne particles and protect against the inhalation of infectious agents that can be transmitted through the air, such as tuberculosis or certain viral infections.

Airborne precautions are implemented when pathogens are capable of being transmitted through small droplets that remain suspended in the air for prolonged periods and can travel long distances. Regular facemasks do not provide adequate protection against these small particles, making the particulate respirator the appropriate choice.

While gloves and maintaining a distance are important infection control measures in other contexts, they do not specifically address the airborne transmission route, which is the primary concern in this scenario. Thus, the use of a particulate respirator mask is a critical step in ensuring the safety of all individuals in the vicinity of the client.