Simultaneous pneumococcal arthritis and osteoarticular tuberculosis.

We have reported the case of a 79-year-old woman who had a pneumococcal pyarthrosis in a chronically swollen knee. Expected improvement did not occur despite appropriate medical and surgical therapy. Mycobacterium tuberculosis was subsequently cultured from fluid aspirated from the patient's joint. This is the first reported case of concomitant pneumococcal pyarthrosis and osteoarticular tuberculosis.