Septic arthritis of the knee by Salmonella montevideo.

We describe a case of salmonella septic arthritis of the knee in a middle-aged woman with the following predisposing conditions: long-term corticosteroids and microscopic collagenous colitis. The patient presented with enteritis caused by the same strain 3 months before the arthritis. The first series of cultures were negative and the possibility of a chronic carriage of the disease was not suspected initially.