[Apropos a case of primary meningococcal arthritis in an adult].

We present the case of a 52-years-old patient which was diagnosed of septic primary meningococcal arthritis, being acute arthritis the only form of presentation without any other manifestations of the meningococcal disease. We want to stress that despite the low frequency of this disease, especially in the adult, it must be taken into account for the assessment of acute mono-oligoarthritis.