Presumed endocarditis caused by BRO beta-lactamase-producing Moraxella lacunata in an infant with Fallot's tetrad

Area of Science:

• Infectious Diseases
• Pediatric Cardiology
• Microbiology

Background:

• Endocarditis is a serious infection of the heart's inner lining, often affecting individuals with pre-existing heart conditions.
• Fallot's tetrad is a congenital heart defect that increases the risk of infective endocarditis.
• Moraxella lacunata is a bacterium typically associated with ocular or respiratory infections, rarely implicated in systemic disease.

Observation:

• A 15-month-old male infant diagnosed with Fallot's tetrad presented with symptoms suggestive of endocarditis.
• Blood cultures identified Moraxella lacunata as the causative agent.
• The infant's father had a recent history of infection with the same organism, suggesting possible transmission.

Findings:

• This case represents the first documented instance of BRO beta-lactamase-producing Moraxella lacunata causing presumed endocarditis in an infant.
• The identification of a specific beta-lactamase (BRO) is significant for understanding antimicrobial resistance patterns.
• The presumed parent-to-child transmission highlights potential routes of infection for opportunistic pathogens.

Implications:

• This finding expands the spectrum of clinical manifestations associated with Moraxella lacunata infections.
• It underscores the importance of considering unusual pathogens in pediatric patients with congenital heart defects and suspected endocarditis.
• Understanding transmission dynamics is crucial for preventing healthcare-associated and community-acquired infections in vulnerable populations.