When pigs were offered a standard feed, the diversity of the coliform flora at the ileocaecal ostium was similar to that of the rectum. Surgical implantation of a T-cannula in the caecum followed by intramuscular treatment with tetracycline did not alter the diversity of the coliform flora at any of these sites. However, changes in the diet influenced the diversity of the coliform flora. Close to a switch in diet, differences in diversity were observed between the two sampling sites.
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