What is the procedure for collecting a nasopharyngeal swab?

The procedure for collecting a nasopharyngeal swab involves inserting a sterile swab into the nasopharynx and gently rotating it for a few seconds. This technique ensures that the swab collects an adequate sample from the back of the nasal cavity and throat, which is essential for testing for various infections, including respiratory pathogens like influenza or COVID-19.

Using a sterile swab is crucial because it prevents contamination of the sample, providing accurate results for diagnostic testing. The rotation helps to dislodge cells and pathogens adhering to the mucosal surface, increasing the likelihood of a quality specimen.

In contrast, other options do not follow the proper protocol. For example, using a non-sterile swab would not be appropriate as it runs the risk of contamination. Similarly, extracting fluid with a syringe is not the standard method for nasopharyngeal collection, as this would not provide the necessary cellular material for accurate testing. Cleaning the nasopharynx with saline before collection is also unnecessary and could affect the sample quality. Thus, the correct answer reflects the best practice for ensuring a valid and reliable test result.