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Effect of liquid whey feeding on fecal microbiota of mature and growing pigs

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The effect of liquid whey feeding on fecal bacteria and their metabolites was assessed in five pregnant sows and 66 growing pigs. Sows were fed a control diet for 4 weeks (control period) followed by the same diet but with whey feeding (5 L/day/pig) for 4 weeks (whey period). One group of growing pigs was given 267 L of whey per pig (whey group), while the other group was not (control group). In both cases, liquid whey was given separately from control diet. Sows in the whey period had feces showing lower pH, lower ammonia concentration, and larger population sizes of total bacteria, lactobacilli and bifidobacteria. The bacterial gene library analysis indicated that Mitsuokella and Megasphaera were more frequently detected, while Clostridium disporicum were detected less frequently in the whey period. Feces from whey‐fed growing pigs showed lower pH than that from control pigs in the early stage of growing. Also, larger populations of total bacteria, lactobacilli and bifidobacteria were recorded in the whey group. From the bacterial gene library analysis, the detection frequency of Lactobacillus reuteri tended to be higher in the whey group. These results indicate that whey feeding influences the hindgut microbiota of pigs, possibly leading to a fermentation shift that is favorable for animal health.
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Document Type: Research Article

Affiliations: 1: Research Faculty of Agriculture, Hokkaido University, Kita, Sapporo 2: Interfarm Co., Ltd, Abashiri 3: National Institute of Livestock and Grassland Science 4: Nippon Meat Packers, Inc., R&D Center, Tsukuba 5: Japan Livestock Industry Association, Minato, Tokyo, Japan

Publication date: August 1, 2011

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