Medication induced xerostomia with throat discomfort
Lower threshold for imaging with neck swelling or systemic toxicity
Pediatrics
Pediatric specifics
GAS testing strategy
No routine testing under age 3 years unless risk factors and classic presentation
RADT negative backup culture recommended
Retropharyngeal abscess risk higher in young children
Neck stiffness
Refusal to extend neck
Drooling
Weight based dosing verification
Amoxicillin 50 mg/kg daily for 10 days
Benzathine penicillin G weight cut point 27 kg
Background
Epidemiology
Frequency and patterns
Viral causes predominate in all ages
GAS proportion higher in school age children
Winter and early spring seasonality for GAS
Transmission via respiratory droplets
Pathophysiology
Mechanisms
Viral mucosal inflammation and ulceration patterns by pathogen
GAS adherence and toxin mediated inflammation
Scarlatiniform rash from erythrogenic toxins
Suppurative spread
Peritonsillar space
Retropharyngeal space
Parapharyngeal space
Nonsuppurative sequelae of GAS
Acute rheumatic fever
Poststreptococcal glomerulonephritis
Therapeutic Considerations
Stewardship and outcomes
Antibiotics indicated for confirmed GAS
Reduced symptom duration modest
Reduced transmission
Prevention of acute rheumatic fever
No antibiotics for viral pharyngitis
Reduced adverse drug events
Reduced resistance selection
Timing
GAS treatment within 9 days of symptom onset prevents acute rheumatic fever
Evidence level: guideline based (Class I equivalent)
Patient Discharge Instructions
copy discharge instructions
Home care and expectations
Fluids
Rest
Acetaminophen or ibuprofen as directed
Warm salt water gargles
Avoid sharing drinks and utensils
Antibiotic guidance when prescribed
Complete full course
Contagiousness reduction after 24 hours of antibiotics
Replace toothbrush after 24 to 48 hours on antibiotics if recurrent infections concern
Return to ED now
Trouble breathing
Drooling
Stridor
Cannot swallow liquids
Severe dehydration
Worsening unilateral throat pain
Neck swelling or stiffness
Persistent fever beyond 3 days or new fever after improvement
Rash with ill appearance
Follow up
If not improving within 48 to 72 hours
If recurrent episodes or complications concern
References
Clinical guidelines and evidence
Guideline sources
IDSA guideline for group A streptococcal pharyngitis diagnosis and management
CDC clinical guidance for strep throat and GAS testing
AAP Red Book guidance for pediatric pharyngitis and diphtheria management
National and local public health guidance for diphtheria antitoxin and contact management
Decision tools
Centor criteria validation studies
McIsaac score derivation and validation studies
FeverPAIN score studies
Complications and imaging
Evidence summaries for peritonsillar abscess ultrasound guidance
Deep neck space infection imaging and management reviews
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.