[Impact of purified drinking water use on the small bowel lymphatic region].

The structures of the mesenteric lymph nodes, small bowel, microvascular bed, and a mast cell population of the mesentery of rats were studied by light microscopy. Tap water, filtered water, and macro- and microelement-balanced water were used. The use of the filtered and macro- and micro-element water caused increases in lymph transport in the mesenteric lymph nodes and in the height of small intestinal villi, activated humoral immunity, and produced the most optimum level of a mast cell population and the structure of the mesenteric microvascular bed.