Aortic valve infective endocarditis due to Streptococcus pyogenes : A case report

Area of Science:

• Infectious Diseases
• Cardiology
• Microbiology

Background:

• Group A Streptococcus (GAS) commonly causes pharyngitis and skin infections.
• Infective endocarditis is rarely associated with GAS, with Staphylococcus aureus and other Streptococci being more prevalent.
• Macrolide resistance in GAS is increasing, posing treatment challenges.

Observation:

• A 31-year-old male developed septic shock and acute hypoxic respiratory failure due to GAS bacteremia.
• The patient presented with new severe aortic insufficiency secondary to infective endocarditis after outpatient azithromycin treatment for GAS pharyngitis.
• Urgent aortic valve reconstruction and abscess drainage were performed, with cultures confirming GAS.

Findings:

• This case demonstrates a rare but severe complication of GAS infection.
• The patient's presentation suggests potential macrolide treatment failure or resistance in GAS pharyngitis, leading to invasive disease.
• GAS endocarditis, though uncommon, can lead to life-threatening conditions requiring prompt surgical and medical intervention.

Implications:

• Emphasizes the critical importance of beta-lactams as first-line therapy for GAS pharyngitis.
• Highlights the need to consider antibiotic resistance patterns when treating GAS infections, especially in patients with severe penicillin allergies.
• Underscores the potential for GAS to cause severe invasive infections like endocarditis, necessitating vigilant diagnosis and management.