Usually hematogenous; joint pain, sudden swelling, fever.
Most common organisms: gonococcus, staph., strep, H. influenza,
E. coli, Pseudomonas, Salmonella (SS disease).
Predisposing factors: chronic arthritis (RA, gout), SS, hemophilia,
AIDS, IV drug use.
TB arthritis usually secondary to pulmonary TB. Monostotic large
joint in children, polyostotic, small joints in adult and
spine (Pott disease).
Other : Viruses ( Parvo B19, Rubella, Hepatitis B/C); and
spirochete bacteria (syphilis and Lyme disease).