The constant occurrence of B. welchii as an organism in the intestinal tract has been well established.1 It has been equally well shown that the lower down the intestinal tract, the more prevalent is the organism.2 In cases of intestinal obstruction in which enterostomy has been performed fairly high up, Williams3 has recovered the organism in both the intestinal drainage and the vomitus. In conjunction with the work of Morton and Stabins4 on "The Relation of the B. welchii Antitoxin to the Toxaemia of High Intestinal Obstruction," ample opportunity was afforded to investigate the occurrence of this organism at a certain level in the jejunum.
A simple intestinal obstruction was produced 10 inches (25.5 cm.) distal to the ligament of Treitz by section and inversion of both ends. Swabs were taken from the proximal loop for smear and culture. These are referred to as the first stage