Non-viral micro-organisms in the etiology.
D001170:Arthritis, Infectious / Q000209:etiology* / Q000382:microbiology; D003015:Clostridium Infections / Q000150:complications; D006801:Humans; D009175:Mycoplasma Infections / Q000150:complications; D013290:Streptococcal Infections / Q000150:complications