Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Infectious Arthritis ?
    ### Response:
    Most kinds of arthritis cause pain and swelling in your joints. Joints are places where two bones meet, such as your elbow or knee. Infectious arthritis is an infection in the joint. The infection comes from a bacterial, viral, or fungal infection that spreads from another part of the body.
    