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L'arthrite septique se localise très fréquemment (40 %) sur l'articulation du genou. © m3ron, Fotolia

Definition | Septic arthritis – infectious arthritis

L ‘arthritis sewage is a ignition from one knuckle (knee, hip and shoulder) caused by an infectious agent. The Microorganisms They develop in the synovial tissue, causing pain and reduced movement of the joint. Pathology More common in the elderly, it can occur in children in its acute form.

Pathophysiology of septic arthritis

After penetration into the body (joint injections, surgeryconstruction suit) or a identification (distant infectious site, bacteremia), infectious agents multiply in synovial fluid. Some products from Metabolism Of this microorganism increases the inflammatory reaction, the releaseenzymes by multicore After phagocytosis is destroyed synovial membrane. This reaction may persist even after the infection has been treated and may be harmful to cartilage tissue. The pain and intra-articular effusion encountered in this pathology will be a consequence of these mechanisms.

Various forms of septic arthritis

Clinically, in the context of acute infection, a distinction is made between gonococcal arthritis (usually in healthy adults) that does not permanently damage the joints and non-gonococcal arthritis, which is more severe, damaging cartilage. This is mainly because Staphylococcus aureus. in 5% of cases (mycobacteriaAnd the fungal infectionsAnd the bacteria a little Pathogens), arthritis can develop over several weeks, and become chronic, especially in patients with it risk factor (HIV, prosthesis, rheumatoid arthritis). Finally, special post-operative care will be provided as part of a arthritis Rot on the prosthesis, due to the presence of foreign substances.

Whatever the shape, the Diagnosis It depends on the culture and treatment of synovial fluid Antibiotic Adapted, accompanied by Drainage As per cases.

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