First Case of Pleural Empyema Caused by Staphylococcus simulans: Review of the Literature

Area of Science:

• Infectious Diseases
• Microbiology
• Clinical Medicine

Background:

• Staphylococcus simulans is a coagulase-negative Staphylococcus (CoNS) primarily known as an animal pathogen.
• Human infections are rare, usually linked to animal contact.
• CoNS identification and clinical relevance assessment pose diagnostic challenges.

Observation:

• This study reports the first case of pleural empyema caused by Staphylococcus simulans in an elderly woman.
• The organism's biofilm-forming capacity contributes to severe infections, particularly on prosthetic devices.
• Large effusions, pleural thickness, and antibiotic properties impede treatment efficacy.

Findings:

• Staphylococcus simulans is an emerging cause of severe human infections with high mortality.
• The pathogen exhibits multidrug resistance, including to vancomycin.
• Despite prompt treatment, the patient's outcome was fatal.

Implications:

• Early and accurate identification of Staphylococcus simulans is crucial for effective treatment.
• Understanding the virulence factors and resistance patterns of S. simulans is vital for managing severe infections.
• Source control and appropriate antimicrobial therapy are critical in treating S. simulans infections.