A staph infection is caused by a group of bacteria called Staphylococcus, which can cause various illnesses. There are approximately 30 different types of Staphylococci, but infections from Saphylococcus aureus are most commonly seen. Staphylococci bacteria are normally found throughout the body, but if it multiplies, it can overwhelm the immune system and cause disease. This can include a minor illness or an infection within the joints. In severe cases, an infection can become life threatening. If symptoms of a staff infection in the joints appear, it is important to seek medical attention to avoid complications.
Fever
Staphylococcus is one of the more common causes of infectious arthritis in the joints. Bacteria may enter the body through a cut, from a sinus infection or be introduced during surgery, warns the University of Washington School of Medicine. Individuals with autoimmune conditions or who take drugs that suppress the immune system are at the highest risk of infectious arthritis. When a joint becomes infected, a fever may develop as the body tries to fight off the infection. Fevers can be accompanied by shaking and chills.
Swelling and Pain
The knees are the most common joint to be affected by an infection states the Mayo Clinic, but any joint can develop one. As the infection sets in, the affected joint will often become painful and swollen. The joint may also feel stiff and be hard to move. For some, the pain is mild, while in others, it can be severe. Any unexplained joint swelling should always be properly evaluated. Infections need to be treated with antibiotics; the earlier treatment is started, the better.
Redness and Warmth
Staph infections often cause the joint to become red, and the area may feel warm to the touch, claims Merck. Some patients also develop blisters that are filled with a yellow-colored pus. Joint fluid aspiration, blood tests, X-rays and MRIs can all be used to obtain a diagnosis. Quick diagnosis and treatment are important, because in severe cases, joints can be permanently damaged within hours or days. It is also important for the physician to determine exactly what strain of Staphylococcus is causing the infection in order to determine which antibiotic is best.
