Irritable bowel syndrome (IBS) is a chronic non–life-threatening disorder characterized by abdominal pain and alteration in bowel habits. IBS is an extremely common disorder; estimates put the prevalence in the North American population at 10 to 15%, with women affected twice as often as men. Although only one third of patients who have the clinical syndrome ever seek medical attention, IBS acc...

The colon is supplied with arterial blood from two main sources: the superior mesenteric artery (arteria mesenterica superior) and the inferior mesenteric artery (arteria mesenterica inferior). The right colon is supplied from the superior mesenteric artery through the following arteries: ileocolic artery (arteria ileo-colica), right colic artery (arteria colica dextra) and middle colic artery ...

The ability of Escherichia coli to survive stress during growth in different environments is, in large part, dependent on rpoS and the genes that comprise the rpoS regulon. E. coli BJ4 and an isogenic BJ4 rpoS mutant were used to examine the influence of the rpoS gene on E. coli colonization of the streptomycin-treated mouse large intestine. Colonization experiments in which the wild-type E. co...

1. The blood group specific substance A is present in the contents of the jejunum and upper ileum of persons belonging to Group A. 2. A marked decrease in the amount of A substance occurs in the lower ileum and cecum, while colon and rectum contents of adults are more or less free of group substance A. 3. The blood group destroying agent first appears in the lower ileum or cecum and its effecti...