Nasopharyngeal culture is a sample of secretions from the uppermost part of the throat, behind the nose, to detect organisms that can cause disease.
You will be asked to cough before the test begins and then tilt your head back. A sterile cotton-tipped swab is gently passed through the nostril and into the nasopharynx, the part of the pharynx that covers the roof of the mouth. The swab is quickly rotated and then removed.
There is no special preparation necessary.
You may experience slight discomfort and may gag.
The test identifies viruses and bacteria that cause upper respiratory tract symptoms. Nasopharyngeal cultures are useful in identifying respiratory viruses, and specific bacteria such as:
The culture may be used to help determine which antibiotic therapy is appropriate.
The presence of organisms commonly found in the nasopharynx is normal.
The presence of any disease-causing virus, bacteria, or fungus means these organisms may be involved in your infection. Sometimes organisms like Staphylococcus aureus can be present without causing disease, but the test can identify resistant strains of this organism (methicillin-resistant Staphylococcus aureus, or MRSA) and patients can be isolated when necessary.
There are no risks.
Culture - nasopharyngeal; Swab for respiratory viruses; Swab for Staph carriage
Hewlett EL. Whooping cough and other Bordetella infections. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia,PA: Saunders Elsevier; 2011:chap 321.
Updated by: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Denis Hadjiliadis, MD, Assistant Professor of Medicine, Division of Pulmonary, Allergy and Critical Care, University of Pennsylvania, Philadelphia, PA. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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