In adults, the most commonly affected joint is the knee.
Key Point:
Septic arthritis has clearly defined risk factors and clinical characteristics on presentation that are essential to early identification and treatment.
Explanation:
Septic arthritis most commonly results from the hematogenous migration of bacteria into the joint. The infection is almost always monoarticular, with the knee being the most commonly affected joint in adults. In children, the most commonly affected joints are the hips and knees. Septic arthritis occurs in all age groups, but it is more common in children. Two-thirds of pediatric cases occur in patients younger than 2 years of age. The diagnosis of septic arthritis requires joint aspiration.
References:
Kellerman RD, et al, eds. Conn’s Current Therapy. 2018.
Walls R, et al. Rosen’s Emergency Medicine: Concepts and Clinical Practice. 9th ed., 2018.