Gram-negative arthritis with a simultaneous urinary tract infection in a renal transplant recipient

Infections are common causes of morbidity in the renal transplant population, but infectious arthritis is rarely encountered. Gram-negative joint infections in the nontransplant population are often associated with simultaneous urinary tract infections. We report a case of Escherichia coli monoarthritis and a concomitant urinary tract infection in a renal transplant recipient and consider the possible predisposing factors for the infection.