[Acarids of pathological significance in urine]

The present paper reports on 7 cases of primary infections, pyelonephritis and pyelocystitis, in which acrids were found in the urine during acute attacks. The cases were detected in the clinical laboratory of a county Hospital. All the 7 patients, ranging in age from 6 to 60 years, exhibited characteristic symptoms of pyelonephritis and pyelocystitis. Numerous acarids were found in the urinary sediment and, in some cases, also their eggs. Some of the acarids were motile, others were encrusted with salts. A female acarid was detected while laying eggs. In 6 patients the acardis were found in the urine only at the first examination and disappeared following the of urinary infection; in the seventh case they were detected at three consecutive examinations performed at 3--6 days interval.