Staphylococcus lugdunensis from gluteal abscess to destructive native triple valve endocarditis

Area of Science:

• Infectious Diseases
• Cardiology
• Microbiology

Background:

• Staphylococcus lugdunensis, a coagulase-negative staphylococcus, is typically part of normal skin flora.
• Recent emergence as a virulent pathogen causing both nosocomial and community-acquired infections.

Observation:

• A 43-year-old male diabetic patient presented with aggressive infective endocarditis.
• The infection involved the tricuspid, mitral, and aortic valves.
• The causative agent was identified as Staphylococcus lugdunensis, originating from a gluteal abscess.

Findings:

• Staphylococcus lugdunensis demonstrated unusual virulence, leading to severe multi-valve endocarditis.
• Persistent coagulase-negative blood cultures require thorough investigation for accurate identification.
• Early detection and prompt, aggressive antibiotic therapy are critical for managing S. lugdunensis infections.

Implications:

• Highlights the need for heightened clinical suspicion and diagnostic diligence when encountering Staphylococcus lugdunensis.
• Underscores the importance of not dismissing coagulase-negative staphylococci as mere contaminants.
• Emphasizes the necessity of aggressive treatment strategies to prevent severe outcomes like endocarditis.