Purulent invasion of a joint by an infectious agent which produces arthritis.
Symptoms:
Usually one joint is infected
Significant shoulder pain, especially with movement
Swelling in the shoulder
Redness in the shoulder
Warmth on the shoulder
Causes:
Trauma
Dog bite
Bacterial injection most common- Bacteria are carried by the bloodstream from an infectious focus elsewhere, introduced by a skin lesion that penetrates the joint, or by extension from adjacent tissue
