Laboratory studies:
Full-differential blood count may show leukocytosis with deviationto the left of the formula
erythrocyte-sedimentation rate and C-reactive protein
blood-cultures may be positive in 50% of infections withStaphylococcus aureus and Neisseria gonorrhoeae in detectingweak
-urethral cultures, throat, rectal and cervical hemocultures more positive than for gonorrhea
synovial-fluid analysis, Gram stain, culture, cell counting andanalysis of crystals
silver-staining is used to detect Lyme disease organisms
-evaluate uric acid uric arthropathy
serological tests for rheumatoid arthritis, and vasculitis.
Imaging Studies:
Radiograph showed swelling around the joints with joint spaceeffusion and general. Moving paniculelor fat is present in children.Once progression observed joint space collapse and destruction of cartilage. The appearance of marginal erosions withintracapsular bone destruction. Phemister triad characterizedruberculoasa arthritis: peripheral bone erosions, juxta-articularosteoporosis, the gradual collapse of the joint space. Occasionallyit can be observed in adjacent tissues or joint gas in infection with Escherichia coli or Clostridium perfringens.
CT scanning is not usually used in assessing joint infections. It maybe accurate in evaluating septic arthritis. It is useful in evaluation ofthe sacroiliac joint and sternoclaviculare. Detect early changes inseptic arthritis synovial thickening or effusion such as. Periarticularabscesses or collections of fluids can be identified.
Scintigraphic scans are used for nonspecific areas ofinflammation. They can not differentiate infectious processes of thesterile, but are useful in areas such as balance and seized the sacral-iliac joint.
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