Septic arthritis

Septic arthritis develops when bacteria or other tiny disease-causing organisms (microorganisms) spread through the blood to a joint. It may also occur when the joint is directly infected with a microorganism from an injury or during surgery. Joints that are commonly affected are the knee and hip V体育安卓版.

Most cases of acute septic arthritis are caused by staphylococcus or streptococcus bacteria.

Chronic septic arthritis (which is less common) is caused by organisms including Mycobacterium tuberculosis and Candida albicans.

The following conditions increase your risk for septic arthritis:

• Artificial joint implants
• Bacterial infection somewhere else in your body
• Presence of bacteria in your blood
• Chronic illness or disease (such as diabetes, rheumatoid arthritis, and sickle cell disease)
• Intravenous (IV) or injection drug use
• Medicines that suppress your immune system
• Recent joint injury
• Recent joint arthroscopy or other joint surgery

Septic arthritis may be seen at any age. In children, it occurs most often in those younger than 3 years. The hip is often the site of infection in infants. Most cases are caused by the bacteria group B streptococcus. Another common cause is Haemophilus influenza, especially if the child has not been vaccinated for this bacterium VSports注册入口.