S. aureus S.pyogenes
N. meningitidis H. influenzae (mostly non capsulate)
Nasopharyngeal Aspirates, perinasal and Anterior Nasal swabs Commensals
Gram positive S. viridans S. pneumoniae Entrococci Staphylococcus species Micrococci
Gram negative Neisseria species Haemophilus species
Collection and Transport of upper Respiratory Tract specimens Nasopharyngeal aspirates: Gently pass a sterile catheter through one nostril as far as the nosopharynx. : Attach a sterile syringe to the catheter, and aspirate a specimen of mucopus. : Dispense the specimen into a small sterile container. : Label and deliver with a completed request form to the laboratory as soon as possible.