Abstract
The values of pH and the concentrations of nitrogen (N) and ammonia in the middle part of the small intestinal and cecal contents of germfree (GF) and conventionalized (CVZ) seven-week-old rats were compared. The pH of the small intestinal and cecal contents of GF rats was higher than that of CVZ rats. There was no difference in total N per fresh weight in contents from the middle part of the small intestine between GF and CVZ, whereas total N per fresh weight of the cecal contents was higher in CVZ than in GF rats. The ammonia concentrations per fresh weight or per total N in the intestinal and cecal contents of CVZ rats were higher than those of GF rats.
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