Ureaplasma urealyticum and infected renal calculi.

In a group of 41 patients with infection lithiasis, the presence of Ureaplasma urealyticum in urine and in the calculi was investigated. A control group of 27 patients with metabolic lithiasis was simultaneously evaluated. Ureaplasma urealyticum was detected in a total of 10 patients with infection lithiasis. In 7 of those patients, U. urealyticum was the only urease producing microorganism detected, while in the remaining 3 it was detected along with common bacteria. We believe that U. urealyticum may be considered as a possible causative factor of infection lithiasis.