Diagnosis and Management of Sore Throat

Clinical Risk Stratification Algorithm

The American College of Physicians recommends using the Centor criteria to risk-stratify patients, then testing only those with 2 or more criteria using a rapid antigen detection test (RADT) or throat culture for Group A Streptococcus, as patients with fewer than 2 criteria do not need testing 1, 2
The Centor criteria include fever, tonsillar exudates or pharyngeal exudates, tender anterior cervical lymphadenopathy, and absence of cough, with a testing strategy based on the Centor score 1, 2
For patients with 0-1 criteria, no testing is needed, as viral etiology is most likely, and symptomatic treatment only is recommended 1, 2
For patients with 2 criteria, consider testing with RADT or throat culture 2
For patients with 3-4 criteria, perform RADT or throat culture before prescribing antibiotics 1, 2, 3

The Infectious Diseases Society of America recommends that Rapid Antigen Detection Test (RADT) is the preferred initial test for patients meeting testing criteria, and does not require confirmatory throat culture after a negative result in both adults and children 2
Throat culture is not necessary for routine diagnosis but can be used as an alternative to RADT 2
The American College of Physicians recommends against routinely using biomarkers, such as C-reactive protein or procalcitonin, in the assessment of acute sore throat 2

The American Academy of Family Physicians recommends immediately evaluating for life-threatening conditions if the patient presents with difficulty swallowing, drooling, or neck swelling, which suggests peritonsillar abscess, parapharyngeal abscess, or epiglottitis 1
Severe unilateral throat pain with trismus and uvular deviation indicates peritonsillar abscess (quinsy) 4
Persistent fever with neck pain in adolescents/young adults with severe pharyngitis requires consideration of Lemierre syndrome (suppurative thrombophlebitis of internal jugular vein) 1, 3, 4

The American College of Physicians recommends against testing patients with clear viral symptoms, such as cough, rhinorrhea, or conjunctivitis, as this leads to false-positive results in carriers and unnecessary antibiotic use 1, 4
The Infectious Diseases Society of America recommends against prescribing antibiotics based on clinical features alone without microbiological confirmation, as clinical features cannot reliably distinguish GAS from viral pharyngitis 4
The American Academy of Family Physicians recommends maintaining high suspicion for life-threatening complications, such as peritonsillar abscess and Lemierre syndrome, in patients with unusually severe presentations 1, 4