Abstract
The experimental results on rabbits reported previously were that pyelitis and pyelonephritis were easily developed in the case of the antigen-antibody reaction on hosts as the mechanism of the infections, in which those due to E, coli developed by retrograde urinary infections but were difficult to develop by hematogenous infections, whereas those due to staphylococci were just in opposition in relationship.
At this timee the relations between bacilli and infectious tracts were clinically studied on 29 cases of simple pyelitis and pyelonephritis, and 15 cases of stone-pyelonephritis as a contrast.
1) The cases accompanying cystitis, or presenting bladder-symptoms were thought to be the pyelitis or pyelonephritis due to retrograde urinary infections. There were 75.8 96 of retrograde urinary infections, and it rose up to 89.5% on the cases of suspicious retrograde urinary infections.
2) In simple pyelitis and pyelonephritis the isolation rate of E. coli was 68.1% and became 86.3% on adding the other gram negative bacilli. In the cases due to retrograde urinary infections the isolation rate of E. coli was 78.5% and became 85.7% on adding the other gram negative bacilli. In conclusion on the pyelitis andd pyelonephritis due to retrograde infections gram negative bacilli as E. coli were frequent but gram positive cocci as staphylococcus were infrequent.
3) In stone-pyelonephritis due to hematogenous infections the isolation rate of staphylococci was 75.0% and that of enterococci was 18.7%. Gram positive cocci were cultured overwhelmingly numerous.
4) As above these results of the clinical observation were coincided with results of experimental works on rabbits.
