Bacteriological study of urine of 350 apparently healthy children who were divided into groups according to the various stages of childhood ago. In each study urine sediment , gram staining and the qualitative and quantitative culture was performed. The study revealed three maximum sediment leukocytes per microscopic field in 12.3 % of things and 1-2 erythrocytes per field in 6.28 %. No clear cylinders or inflammatory cells were observed . QRAM by coloring germs no sediment or total urine were detected. The qualitative culture was positive in 58% of cases have been isolated most often staphylococcus , coli and Klebsiella . However, quantitative culture revealed that the germ count did not exceed the threshold of 5 x 103, and that most cases ( 71 % ) had less than 1,000 bacteria per ml. , Or that were merely contaminants. This shows the importance of quantitative culture to differentiate ...