Group a beta-hemolytic streptococcal otitis externa in an infant

Area of Science:

• Pediatrics
• Infectious Diseases
• Otolaryngology

Background:

• Acute otitis externa (AOE) is a common infection of the external ear canal.
• While various bacteria can cause AOE, specific causative agents in infants are less frequently reported.
• Group A beta-hemolytic Streptococcus (GABHS) is a significant pathogen, primarily associated with pharyngitis and scarlet fever.

Observation:

• A 5-week-old infant presented with bilateral otorrhea (ear discharge).
• The otorrhea was clinically diagnosed as acute localized otitis externa.
• Physical examination revealed signs consistent with localized inflammation of the external auditory canal.

Findings:

• Bacterial cultures from the otorrhea identified Group A beta-hemolytic Streptococcus (GABHS) as the sole causative agent.
• This represents a previously unreported etiology for acute localized otitis externa in an infant.
• The identification of GABHS highlights its potential role beyond typical respiratory tract infections in neonates.

Implications:

• This case suggests GABHS should be considered in the differential diagnosis of infant otitis externa, even in the absence of typical GABHS symptoms.
• Understanding novel bacterial causes of common pediatric conditions is crucial for appropriate and timely treatment.
• Further research may be warranted to explore the incidence and clinical presentation of GABHS-induced otitis externa in infants.