Antibiotic-responsive diarrhea (ARD) is an idiopathic syndrome causing chronic diarrhea in young, large-breed dogs. Why antibiotics are effective in controlling diarrhea is not understood, and whether small intestinal bacterial numbers are truly increased is now doubted, but previous focus on the condition being small intestinal bacterial overgrowth has hampered the understanding of this condition. The name ARD simply defines the condition, and studies are now looking at the interaction of small intestinal bacteria and the mucosa to try to understand why it occurs.
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Center for Nutritional Sciences, Food Science and Human Nutrition Department, College of Agricultural and Life Sciences, University of Florida, Gainesville, FL 32611.
Documented worldwide, impaired immunity is a cardinal signature resulting from loss of dietary zinc, an essential micronutrient. A steady supply of zinc to meet cellular requirements is regulated by an array of zinc transporters. Deletion of the transporter Zip14 (Slc39a14) in mice produced intestinal inflammation.
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Postnatal establishment of enteric metabolic, host-microbial and immune homeostasis is the result of precisely timed and tightly regulated developmental and adaptive processes. Here, we show that infection with the invasive enteropathogen Typhimurium results in accelerated maturation of the neonatal epithelium with premature appearance of antimicrobial, metabolic, developmental, and regenerative features of the adult tissue. Using conditional Myd88-deficient mice, we identify the critical contribution of immune cell-derived mediators.
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