Final answer:
The nurse should implement airborne precautions for a client with active tuberculosis by wearing a respiratory mask and ensuring proper room ventilation.
Step-by-step explanation:
The nurse should implement airborne precautions for a client with active tuberculosis. Tuberculosis is primarily transmitted through the air when a person coughs, sneezes, or talks, releasing droplet nuclei containing the tubercle bacilli. These droplets can remain suspended in the air for long periods of time and can be inhaled by others. Airborne precautions include wearing a respiratory mask, such as an N95 mask, when in close contact with the client, and ensuring proper room ventilation to minimize the risk of transmission to others.