Final answer:
The nurse should insert a swab into the client's throat to collect a sample during a throat culture procedure.
Step-by-step explanation:
While performing a throat culture, the nurse should insert a swab into the client's throat to collect a sample. This is done to obtain a specimen for laboratory analysis, which can help diagnose infections or other throat-related conditions. This procedure is commonly performed to identify bacteria that may be causing symptoms such as sore throat, cough, fever, or difficulty swallowing. It is important for the nurse to follow proper technique and instructions for collecting the throat culture sample to ensure accurate results.