Beta-Hemolytic Nongroup A Streptococcal Pharyngitis in Children

Area of Science:

• Pediatric infectious diseases
• Microbiology
• Clinical epidemiology

Background:

• Nongroup A streptococci (NGAS) are increasingly recognized pathogens in pediatric pharyngitis.
• Understanding their epidemiology and clinical presentation is crucial for appropriate management.
• Current antibiotic prescribing patterns for NGAS require evaluation.

Purpose of the Study:

• To investigate the epidemiology, clinical characteristics, and antibiotic prescribing trends for NGAS in pediatric patients.
• To compare NGAS infections with group A Streptococcus (GAS) and culture-negative pharyngitis.
• To inform clinical practice and antibiotic stewardship.

Main Methods:

• Retrospective analysis of throat cultures from a large community health system over 10 years.
• Comparison of epidemiologic and clinical features between NGAS, GAS, and negative culture groups.
• Evaluation of antibiotic prescribing patterns for children diagnosed with NGAS.

Main Results:

• NGAS incidence increased with age (2% in ≤5 years to 7% in 18 years) but showed no seasonal variation.
• Patients with NGAS were more likely to have tonsillar exudate and enlarged tonsils compared to negative cultures.
• NGAS infections were associated with milder symptoms than GAS infections, with lower rates of fever and palatal petechiae.

Conclusions:

• NGAS infections in children are generally milder than GAS infections and rarely lead to complications.
• The incidence of NGAS increases with age, suggesting a role in both carriage and infection.
• High rates of antibiotic prescribing for NGAS are observed, contrary to current treatment guidelines.