DefinitionNasopharyngeal culture is a sample of secretions from the uppermost part of the throat, behind the nose, to detect organisms that can cause disease.Alternative NamesCulture - nasopharyngeal; Swab for respiratory viruses; Swab for Staph carriageHow the test is performedYou 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.How to prepare for the testThere is no special preparation necessary.How the test will feelYou may experience slight discomfort and may gag.Why the test is performedThe test identifies viruses and bacteria that cause upper respiratory tract symp