Most common strain of infectious arthritis.
Women affected 2-3 times more frequently than men.
Migratory tenosynovitis often associated with arthritis.
Gram stain of synovial fluid is positive in fewer than 10% of patients.
Synovial fluid culture often negative.
Response to treatment usually rapid and complete, such that this type of septic arthritis is much less destructive than nongonococcal arthritis.