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Health Information : Infectious Arthritis

What is infectious arthritis?

Infectious arthritis is an infection in the joint (synovial) fluid and joint tissues. The infection usually reaches the joint(s) though the bloodstream, although some joints may become infected due to an injection, surgery, or injury. Different bacteria and viruses can infect a joint and usually are associated with a person's age, including the following:

    * Staphylococci (a common bacteria that often causes skin infections), Haemophilus influenzae (a bacteria that can infect the larynx, trachea, and bronchi), and gram-negative bacilli (a group of bacteria, including Escherichia coli, or E. coli) are usually associated with young children and infants
    * Gonococci (the bacteria that causes gonorrhea), staphylococci, and streptococci (a group of bacteria that can lead to a wide variety of diseases) are usually associated with older children and adults.
    * Viruses, such as the human immunodeficiency virus (HIV), tend to infect the joints of people of all ages.

How is infectious arthritis diagnosed?


Prompt diagnosis of infectious arthritis is necessary to prevent permanent damage to the joint. In addition to a complete medical history and physical examination, diagnostic
procedures for infectious arthritis may include the following:

    * removal of joint fluid (to examine for white blood cells and bacteria)
    * blood tests (to detect bacteria)
    * phlegm, spinal fluid, and urine tests (to detect bacteria and find the source of infection)

     
Treatment for infectious arthritis:


Specific treatment for infectious arthritis will be determined by your physician based on:

    * your age, overall health, and medical history
    * extent of the condition
    * your tolerance for specific medications, procedures, and therapies
    * expectation for the course of the disease
    * your opinion or preference