Staphylococcus lugdunensis: the coagulase-negative staphylococcus you don't want to ignore

Area of Science:

• Clinical Microbiology
• Infectious Diseases
• Bacteriology

Background:

• Staphylococcus lugdunensis is a coagulase-negative staphylococcus (CoNS) with significant virulence, often mimicking Staphylococcus aureus infections.
• This bacterium has been linked to severe conditions including toxic shock syndrome, osteomyelitis, septic arthritis, and postoperative endophthalmitis.
• Notably, S. lugdunensis endocarditis presents with high complication rates, including heart failure, periannular abscesses, and embolic events, with potentially higher mortality compared to other CoNS.

Purpose of the Study:

• To highlight the pathogenic potential of Staphylococcus lugdunensis.
• To emphasize the importance of considering S. lugdunensis in severe clinical presentations, particularly endocarditis.
• To underscore the need for accurate laboratory identification and prompt clinical evaluation in bacteremic patients.

Main Methods:

• Review of clinical cases and literature concerning Staphylococcus lugdunensis infections.
• Analysis of reported complications and outcomes associated with S. lugdunensis bacteremia and endocarditis.
• Discussion of diagnostic challenges and recommended antimicrobial strategies.

Main Results:

• Staphylococcus lugdunensis exhibits a virulent profile comparable to Staphylococcus aureus.
• Endocarditis caused by S. lugdunensis is associated with severe complications and increased mortality.
• Laboratory identification of S. lugdunensis can be challenging, potentially leading to misidentification.

Conclusions:

• Staphylococcus lugdunensis is a significant pathogen that warrants clinical attention, especially in cases of endocarditis.
• Accurate and timely identification is critical for appropriate management.
• Empirical treatment with beta-lactam antimicrobials is recommended pending susceptibility results, and endocarditis evaluation is essential in bacteremic patients.