Anaerobic septic arthritis.

Area of Science:

• Infectious Diseases
• Orthopedic Surgery
• Microbiology

Background:

• Anaerobic septic arthritis is a serious joint infection.
• It frequently impacts major weight-bearing joints like the hip and knee.
• This condition can arise from surgical procedures or underlying chronic diseases.

Purpose of the Study:

• To analyze the incidence and characteristics of anaerobic septic arthritis.
• To identify common anaerobic pathogens involved in septic arthritis.
• To evaluate treatment outcomes and identify prognostic factors.

Main Methods:

• Retrospective review of 43 patients diagnosed with anaerobic septic arthritis over 3.5 years.
• Analysis of joint involvement, patient history (surgery, chronic disease), and causative organisms.
• Assessment of treatment strategies (surgery, antimicrobial therapy) and patient outcomes.

Main Results:

• 43 patients (46 joints) diagnosed with anaerobic septic arthritis; hip and knee were most affected (83%).
• Surgical patients (23) often had Gram-positive cocci (e.g., Peptococcus magnus); non-surgical patients (8) predominantly had Gram-negative bacilli (e.g., Bacteroides fragilis).
• Aggressive surgery and minimum 3-week antimicrobial therapy were required; infected total joint arthroplasties needed removal. Poor outcomes and mortality occurred in patients with chronic diseases.

Conclusions:

• Anaerobic septic arthritis necessitates prompt, aggressive management including surgery and extended antimicrobial treatment.
• Specific microbial patterns differ between post-surgical and non-surgical patients.
• Early intervention is critical to prevent joint dysfunction and mortality, especially in immunocompromised individuals.