Management of Acute Sore Throat in Healthy Adults and Adolescents with High‑Probability Streptococcal Features

Diagnostic Strategy

A Modified Centor score of 4 predicts a 51‑53 % probability of Group A Streptococcus (GAS) pharyngitis, making microbiological testing strongly recommended. 1
Perform a rapid antigen detection test (RADT) immediately; a positive RADT is diagnostic for GAS and does not require confirmatory culture. 1
In adolescents, a negative RADT should be followed by a backup throat culture because of lower test sensitivity; in adults, routine backup culture after a negative RADT is not required. 1

First‑line therapy is penicillin V 250 mg orally twice or three times daily for 10 days; shorter courses lack sufficient evidence for GAS eradication. 2
Antibiotic therapy shortens symptom duration by 1–2 days, with a number needed to treat of 6 at day 3 and 21 at day 7. 1
The primary goals of antibiotic treatment are prevention of acute rheumatic fever, peritonsillar abscess, and reduction of transmission to contacts. 1

Provide analgesia; ibuprofen or acetaminophen are the most effective symptomatic treatments. 2
Throat lozenges may provide additional relief. 1
Avoid aspirin in adolescents because of the risk of Reye syndrome. 3

Immediate evaluation is required for:
- Difficulty swallowing or drooling,
- Neck tenderness or swelling,
- Unilateral tonsillar swelling with uvular deviation, and
- A “hot‑potato” voice.
Fusobacterium necrophorum accounts for 10‑20 % of endemic pharyngitis in adolescents and can cause Lemierre syndrome; clinicians should remain vigilant for severe or worsening illness despite appropriate therapy. 1

Do not prescribe empiric antibiotics based solely on clinical features; over 60 % of adults with sore throat receive unnecessary antibiotics. 1
Do not use abbreviated penicillin courses (e.g., 5 days); a full 10‑day regimen is required for adequate GAS eradication. 2
Do not test or treat asymptomatic household contacts unless a specific outbreak is identified. 3
Do not perform routine post‑treatment testing in asymptomatic patients, as it may detect carriage rather than active infection. 3
Up to 20 % of asymptomatic adolescents may be GAS carriers during winter/spring; a positive test in the presence of viral symptoms (cough, rhinorrhea, conjunctivitis) likely reflects carriage, not active infection. 3

Streptococcal pharyngitis symptoms usually resolve within 3–4 days even without antibiotics; untreated patients may experience throat soreness persisting 1–2 days longer than those treated. 4
Viral sore throats typically resolve within 7 days without treatment. 4