Effects of Lactobacillus-Based Probiotic on Performance, Gut Microflora, Hematology and Intestinal Morphology in Young Broiler Chickens Challenged with Salmonella Typhimurium

摘要: This experiment was conducted to compare the effects of multi-strain probiotic inclusion levels on performance, intestinal morphology, gut microflora and hematological changes in Salmonella typhimurium (ST) infected broiler chickens. A total 120 day old Ross 308 chickens were distributed into 20 floor pens reared for 10 days under 5 experimental treatments including a corn-soy basal diet with no (Control), or 0.5 g (0.05%), 1 (0.1%), 1.5 (0.15%) 2 (0.2%) probiotic/kg diet. Chickens orally ST at second experiment. Broilers 0.15% had higher body weight gain compared other treatments. Probiotic supplementation, except 0.05%, significantly improved feed conversion ratio. The use 0.1 reduced population ileum. lowest heterophil:lymphocyte ratio observed probiotic, although 0.2% this control group. Adding increased (P