Which organisms are commonly involved in septic arthritis in children?
Considerable institutional variation exists, but the most common organisms in various age groups are as follows:
| Neonates (<2 months old) | Age 2 months to 5 years old | Age 5–15 years old |
|---|---|---|
| S. aureus | Kingella kingae | S. aureus |
| (hospital-acquired) | S. aureus | Streptococcus pyogenes |
| Streptococci (Group B) | Streptococcus pyogenes | |
| Gram-negative bacilli | Streptococcus pneumoniae | |
| Hemophilus influenza (less common due to vaccination) |
