The following factors may help rule out or diagnose GAS pharyngitis:
GAS infection is most common in children aged 4-7 years
Sudden onset is consistent with GAS pharyngitis; pharyngitis after several days of coughing or rhinorrhea is more consistent with a viral etiology
Contact with others who have GAS or rheumatic fever with symptoms consistent with GAS raises the likelihood of GAS pharyngitis
Headache is consistent with GAS infection
Cough is not usually associated with GAS infection
Vomiting is associated with GAS infection, though not exclusively so
Recent orogenital contact suggests possible gonococcal pharyngitis
A history of rheumatic fever is important
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Cite this: Arlen D. Meyers. Fast Five Quiz: Sore Throat - Medscape - Nov 06, 2019.