Pyelitis occurring in the pregnant woman is an important complication of pregnancy. Its importance is based on (1) the effect of the infection on the general health of the mother; (2) the local changes in the urinary tract; (3) the potential invasion of the puerperal uterus, and (4) its tendency to produce abortion, stillbirth, and prematurity in the fetus.
It is not my purpose to present the entire subject in this paper, but to offer certain facts for consideration that have received little attention in the present literature.
There has been marked divergence of opinion as to the mode of entrance of the infecting organism into the pelvis of the kidney in pyelitis of pregnancy. Most French authorities assert that the organisms invade the blood stream from some focus in the body, usually the intestinal tract, and particularly when a coexisting chronic constipation is present. In support of this view,