Cutibacterium acnes (formerly Proprionibacterium acnes) and Shoulder Surgery

Area of Science:

• Orthopedic Surgery
• Infectious Diseases
• Microbiology

Background:

• Shoulder arthroplasty infections are a rare but serious complication.
• Cutibacterium acnes (C. acnes) is the most common cause of these infections.
• C. acnes infections often present non-specifically and are challenging to diagnose due to slow culture times and normal inflammatory markers.

Purpose of the Study:

• To review the challenges in diagnosing C. acnes infections after shoulder arthroplasty.
• To highlight the importance of early diagnosis for improved patient outcomes.
• To discuss current treatment options and the need for further research.

Main Methods:

• Literature review of C. acnes infections in shoulder arthroplasty.
• Analysis of diagnostic challenges, including culture difficulties and non-specific symptoms.
• Examination of risk factors, such as male gender.

Main Results:

• C. acnes is a difficult-to-culture organism, often requiring 14-17 days for positive results.
• Standard infection workups (ESR, CRP, synovial WBC) are frequently normal.
• Male patients are at higher risk due to increased sebaceous follicles.

Conclusions:

• Improved understanding of C. acnes prevention, diagnosis, and treatment is needed.
• Early diagnosis is key to reducing morbidity and improving outcomes.
• Current treatment options (antibiotics, one- or two-stage exchange) have variable success rates that require further study.