Nasopharyngeal swab

Nasopharyngeal swab is a method used in medicine to collect samples from the back of the nasopharynx (the upper part of the throat behind the nose). This procedure is commonly used to test for respiratory viruses, including the SARS-CoV-2 virus that causes COVID-19.

Procedure

The nasopharyngeal swab procedure involves inserting a long, flexible stick with a soft tip into the nostril. The stick is gently pushed back into the nasopharynx, which can cause slight discomfort. The swab is then rotated for a few seconds to collect secretions before being removed. The sample is then sent to a laboratory for testing.

Uses

Nasopharyngeal swabs are primarily used to detect respiratory viruses. They are the preferred method for collecting samples for COVID-19 testing, as the virus is often present in higher amounts in the nasopharynx. Other viruses that can be detected using this method include influenza and respiratory syncytial virus (RSV).

Limitations

While nasopharyngeal swabs are effective for detecting respiratory viruses, they may not be as effective for detecting bacterial infections. In addition, the procedure can be uncomfortable for the patient, and if not done correctly, can lead to false negative results.

See also

• Oropharyngeal swab
• COVID-19 testing
• Influenza testing