Septic arthritis and osteomyelitis in children

Area of Science:

• Pediatric Infectious Diseases
• Orthopedic Surgery
• Microbiology

Background:

• Septic arthritis and osteomyelitis are significant pediatric infections.
• Understanding causative pathogens and age-related patterns is crucial for effective treatment.
• Previous studies highlight varying diagnostic approaches and outcomes.

Purpose of the Study:

• To analyze the bacterial etiology of septic arthritis and osteomyelitis in children.
• To identify age-specific pathogens and their prevalence.
• To evaluate factors influencing diagnosis and long-term prognosis.

Main Methods:

• Retrospective analysis of 30-year septic arthritis and 25-year osteomyelitis data.
• Bacterial etiology determined through fluid and secretion cultures.
• Data stratified by patient age, infection type, and affected site.

Main Results:

• Specific bacterial etiology identified in ~70% of septic arthritis and 78% of osteomyelitis cases.
• Staphylococcus aureus was the most common pathogen across all age groups.
• Pathogen prevalence varied by age: Gram-negatives and Staph. aureus in neonates, H. influenzae in older infants, and multiple pathogens in children over 2.
• Osteomyelitis diagnosis was delayed compared to septic arthritis.
• Monoarticular involvement was common in septic arthritis (93%), and single bone involvement in osteomyelitis (86%).

Conclusions:

• Age-specific bacterial pathogens influence treatment strategies for pediatric septic arthritis and osteomyelitis.
• Staphylococcus aureus remains a primary pathogen, necessitating targeted antibiotic selection.
• Delayed diagnosis in osteomyelitis and specific patient factors, like neonatal hip involvement, correlate with poorer long-term prognoses.