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The effect of refined functional carbohydrates from enzymatically hydrolyzed yeast on the transmission of environmental Salmonella Senftenberg among broilers and proliferation in broiler housing.

Poultry Science 2018 April 2
Hatching eggs collected from resident broiler breeders at 48 wk of age were used to produce male and female chicks that were assigned sex separately to 96 new litter pens and fed either a 0 or 50 g/MT RFC (refined functional carbohydrate feed additive derived from yeast) diet. There were 24 replicate pens of 12 broilers each per diet per sex. Feed intake and BW were determined at 14, 28, and 42 d of age. Litter was sampled by pen using sterile socks at 35 d and tested for Salmonella spp. using an enzyme linked fluorescence assay method. Salmonella spp. was isolated from 7 of 48 control-fed broiler pens but no RFC-fed pens (P ≤ 0.05). Thereafter, 48 males and 48 females were selected based on litter Salmonella presence and RFC treatment. The cecas of these broilers were aseptically excised after feed withdrawal and lairage and tested for presence of Salmonella spp. There were 18 of the 48 control-fed broilers confirmed positive from litter-positive pens but none from litter-negative pens fed RFC. The serovar of litter and cecal Salmonella isolates was Salmonella enterica subsp. enterica serovar Senftenberg (S. Senftenberg). Female broilers that were fed RFC exhibited greater BW at 28 d (P ≤ 0.05) and 42 d (P ≤ 0.05) while RFC-fed males exhibited improved feed efficiency during the 15-28 d period (P = 0.06). These data demonstrated that dietary RFC reduced the prevalence of Salmonella in the litter and ceca of broilers when fed continuously while not being detrimental to broiler live performance.

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