High Dietary Intake of Rye Affects Porcine Gut Microbiota in a <i>Salmonella</i> Typhimurium Infection Study
2022
Julia Hankel | Bussarakam Chuppava | Volker Wilke | Clara Berenike Hartung | Uthayakumar Muthukumarasamy | Till Strowig | Knud Erik Bach Knudsen | Josef Kamphues | Christian Visscher
Bacterial fermentation of undigested carbohydrates in the hindgut has considerable potential for the stimulation or inhibition of the growth of distinct bacteria within microbiota. The aim of the present study was to evaluate whether high levels of rye affect porcine gut microbiota composition with subsequent effects on the load of <i>Salmonella</i> Typhimurium, an intestinal pathogen with zoonotic relevance. Therefore, forty-two 25-day-old piglets were allocated to two groups and fed a diet containing either 69% wheat or 69% rye for 35 days. One week after introducing the two different diets, the piglets were experimentally infected with <i>Salmonella</i> Typhimurium. The microbiota composition of cecal and fecal samples of the piglets were evaluated 28 days after infection. In the cecum, promoted growth of <i>Bifidobacterium</i>, several lactic acid bacteria and <i>Faecalibacterium prausnitzii</i> were seen in pigs fed the diet containing 69% rye. Bacterial species belonging to the genera <i>Bifidobacterium</i> and <i>Catenisphaera</i> were associated with differing bacterial counts of <i>Salmonella</i> Typhimurium detected in the cecal contents of all piglets in both feeding groups via cultural cultivation. The high intake of rye instead of wheat seems to promote the growth of beneficial intestinal bacteria accompanied by impaired growth conditions for the foodborne pathogen <i>Salmonella</i> Typhimurium.
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