Management of Pharyngitis

Diagnostic Approach

Laboratory confirmation is required because clinical symptoms of GAS and viral pharyngitis overlap broadly 3
Use rapid antigen detection test (RADT) or throat culture in patients with clinical features suggesting bacterial infection 1
In adults, a negative RADT is sufficient to rule out streptococcal pharyngitis without confirmatory culture 1, 4
In children, confirm negative RADT with throat culture due to higher prevalence and rheumatic fever risk 1, 4
Do not test children under 3 years old routinely, as GAS pharyngitis and rheumatic fever are rare in this age group 2

For patients without penicillin allergy, oral penicillin V or amoxicillin for 10 days is the standard of care 3, 1, 2
Amoxicillin (50 mg/kg/day once daily, maximum 1000 mg) offers improved adherence with once-daily dosing 5
Intramuscular benzathine penicillin G (600,000 U for <27 kg; 1,200,000 U for ≥27 kg) as single dose for patients unlikely to complete oral therapy 3, 1, 5
For non-anaphylactic penicillin allergy, first-generation cephalosporins for 10 days 1, 2, 5
For immediate/anaphylactic penicillin allergy, clindamycin 7 mg/kg three times daily (maximum 300 mg per dose) for 10 days 5
Clarithromycin for 10 days 1
Azithromycin for 5 days (12 mg/kg once daily for children; 500 mg day 1, then 250 mg days 2-5 for adults) 1

Withhold antibiotics entirely for patients with negative GAS testing 4
Ibuprofen or acetaminophen for moderate to severe symptoms or high fever 1, 2, 4
NSAIDs (ibuprofen) provide superior pain relief compared to acetaminophen in randomized controlled trials 1
Avoid aspirin in children due to Reye syndrome risk 1, 2
Warm salt water gargles can provide relief 1
Do not use corticosteroids as adjunctive therapy—they provide only minimal benefit (approximately 5 hours pain reduction) with potential adverse effects 1, 2

Never treat based on clinical symptoms alone without laboratory confirmation, as this leads to antibiotic overuse 4
Do not use tetracyclines (high resistance rates), sulfonamides, trimethoprim-sulfamethoxazole (do not eradicate GAS), or older fluoroquinolones like ciprofloxacin (limited GAS activity) 6, 7
Do not perform routine follow-up throat cultures after completing therapy in asymptomatic patients 3, 1, 2
Do not test or treat asymptomatic household contacts 2
Do not switch antibiotics without microbiological indication, as this increases adverse effects without clinical benefit 4

If symptoms persist or recur shortly after completing therapy, consider that patient may be a chronic GAS carrier experiencing viral infections rather than true recurrent GAS pharyngitis 1, 8
For symptomatic treatment failures, consider clindamycin, amoxicillin-clavulanate, or narrow-spectrum cephalosporin as these achieve higher eradication rates 3, 6, 7, 5
Intramuscular benzathine penicillin G if oral compliance is questionable 6, 7
Do not routinely identify or treat chronic GAS carriers as they are at little risk for complications or spreading infection 1, 6, 7
Treatment of carriers is justified only in special circumstances: community outbreak of rheumatic fever, family history of rheumatic fever, or excessive family anxiety 8

Patients become non-contagious after 24 hours of appropriate antibiotic therapy 5, 9
The 10-day duration is necessary for maximal pharyngeal eradication with most antibiotics 3, 1, 8
Primary goal of antibiotic treatment is preventing acute rheumatic fever, not just symptom relief 10, 5
Group C and Group G streptococcal pharyngitis do not cause rheumatic fever and do not require the same treatment approach 6, 7