title: Bacterial monarthritis due to Neisseria meningitidis in systemic lupus erythematosus.
abstract: Two patients with systemic lupus erythematosus developed monarticular infectious arthritis, in which Neisseria meningitidis was recovered from knee synovial fluid. In one instance, the sole manifestation of meningococcal disease was a chronic, indolent, erosive monarthritis. In the second, a febrile, bacteremic illness presented with an acute, septic arthritis.
mesh_terms: D000328:Adult; D001170:Arthritis, Infectious / Q000175:diagnosis / Q000382:microbiology*; D005260:Female; D006801:Humans; D007719:Knee Joint; D008180:Lupus Erythematosus, Systemic / Q000150:complications*; D008585:Meningitis, Meningococcal / Q000382:microbiology*; D008875:Middle Aged; D013582:Synovial Fluid / Q000382:microbiology