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Abstract

The probiotic effects of Lactobacillus rhamnosus strain CF (Chen Fu) on growth performance, meat quality, and microenvironment in specific pathogen-free (SPF) chickens were investigated and compared with Enterococcus faecium. One-hundred-eighty 7-day-old SPF chickens were randomly assigned into 3 groups with 3 replicate pens of 20 chickens each. Group 1 served as a control that was fed a basal diet without probiotics supplementation. Groups 2 and 3 were fed the basal diet supplemented with L. rhamnosus CF and E. faecium, respectively. On d 12 and 24, BW, ADG, feed conversion ratio (FCR), dressing percentage (DP), and apparent digestibility of crude protein (AD-CP) were calculated. Meat color, fat content, shear force, water content, and pH value of breast and thigh muscles; ammonia, urea nitrogen, and uric acid content in plasma; pH value, Enterococcus, Lactobacillus, and E. coli in ceca; and ammonia emission were determined. Compared with group 1, group 2 exhibited higher BW, ADG, AD-CP, DP, cecal Lactobacilli, and muscle fat content (P < 0.05) as well as lower FCR, muscle water content, plasma ammonia, pH value, E. coli, and Enterococcus in ceca, and ammonia emission (P < 0.05), and group 3 exhibited higher BW, ADG, AD-CP, DP, and muscle fat content (P < 0.05), as well as lower FCR, meat color, plasma ammonia, E. coli and Enterococcus in ceca, and ammonia emission (d 24) (P < 0.05). Compared with group 3, group 2 exhibited lower plasma ammonia level, E. coli, and pH value in ceca and ammonia emission (P < 0.05) and higher AD-CP, meat color, pH value in thigh muscles, fat content in breast muscles, and number of Lactobacillus in ceca (P < 0.05). Thus, L. rhamnosus CF improves growth performance, meat quality, and microenvironment and is a potential probiotic additive in chickens.

Keywords: Lactobacillus rhamnosus; ammonia emission; growth; meat quality; specific pathogen-free chicken.

Research Insights

SupplementHealth OutcomeEffect TypeEffect Size
Lactobacillus rhamnosusEnhanced Meat QualityBeneficial
Large
Lactobacillus rhamnosusImproved Cecal MicroenvironmentBeneficial
Moderate
Lactobacillus rhamnosusImproved Growth PerformanceBeneficial
Large
Lactobacillus rhamnosusReduced Ammonia EmissionsBeneficial
Moderate
Lactobacillus rhamnosusReduced Cecal Pathogen LoadBeneficial
Large
Lactobacillus rhamnosusReduced Plasma Ammonia LevelsBeneficial
Moderate
Lactobacillus rhamnosus CLR1505Enhanced Meat QualityBeneficial
Large
Lactobacillus rhamnosus CLR1505Improved Digestive FunctionBeneficial
Moderate
Lactobacillus rhamnosus CLR1505Improved Growth PerformanceBeneficial
Large
Lactobacillus rhamnosus CLR1505Improved Gut Microbiota CompositionBeneficial
Large
Lactobacillus rhamnosus CLR1505Reduced Ammonia EmissionsBeneficial
Moderate
Lactobacillus rhamnosus DSM33560Improved Growth PerformanceBeneficial
Large
Lactobacillus rhamnosus DSM33560Improved Meat QualityBeneficial
Large
Lactobacillus rhamnosus DSM33560Improved MicroenvironmentBeneficial
Large
Lactobacillus rhamnosus LR04Enhanced Meat QualityBeneficial
Large
Lactobacillus rhamnosus LR04Improved Digestive EfficiencyBeneficial
Moderate
Lactobacillus rhamnosus LR04Improved Growth PerformanceBeneficial
Large
Lactobacillus rhamnosus LR04Improved MicroenvironmentBeneficial
Large
Lactobacillus rhamnosus LR04Reduced Ammonia EmissionsBeneficial
Moderate
Lactobacillus rhamnosus LR04Reduced Harmful BacteriaBeneficial
Moderate
Lactobacillus rhamnosus LR06Improved Growth PerformanceBeneficial
Large
Lactobacillus rhamnosus LR06Improved Meat QualityBeneficial
Large
Lactobacillus rhamnosus LR06Increased Cecal Lactobacillus CountBeneficial
Large
Lactobacillus rhamnosus LR06Reduced Plasma Ammonia LevelsBeneficial
Moderate
Lactobacillus rhamnosus LRa05Improved Growth PerformanceBeneficial
Large
Lactobacillus rhamnosus LRa05Improved Meat QualityBeneficial
Large
Lactobacillus rhamnosus LRa05Improved MicroenvironmentBeneficial
Large
Lactobacillus rhamnosus LRa05Reduced Ammonia EmissionsBeneficial
Moderate
Lactobacillus rhamnosus MAK79L08REnhanced Meat QualityBeneficial
Large
Lactobacillus rhamnosus MAK79L08RImproved Growth PerformanceBeneficial
Large
Lactobacillus rhamnosus MAK79L08RImproved MicroenvironmentBeneficial
Large
Lactobacillus rhamnosus PXN 54Improved Cecal HealthBeneficial
Moderate
Lactobacillus rhamnosus PXN 54Improved Digestive PerformanceBeneficial
Moderate
Lactobacillus rhamnosus PXN 54Improved Growth PerformanceBeneficial
Large
Lactobacillus rhamnosus PXN 54Improved Meat QualityBeneficial
Large
Lactobacillus rhamnosus PXN 54Reduced Ammonia EmissionsBeneficial
Moderate
Lactobacillus rhamnosus R0343NDEnhanced Meat QualityBeneficial
Large
Lactobacillus rhamnosus R0343NDImproved Digestive HealthBeneficial
Large
Lactobacillus rhamnosus R0343NDImproved Growth PerformanceBeneficial
Large
Lactobacillus rhamnosus R0343NDReduced Ammonia EmissionsBeneficial
Moderate
Lactobacillus rhamnosus R0343NDRestored Healthy Gut Microbial BalanceBeneficial
Large
Lactobacillus rhamnosus UALr-18Improved Apparent Digestibility of Crude ProteinBeneficial
Moderate
Lactobacillus rhamnosus UALr-18Improved Average Daily GainBeneficial
Moderate
Lactobacillus rhamnosus UALr-18Improved Body WeightBeneficial
Moderate
Lactobacillus rhamnosus UALr-18Improved Dressing PercentageBeneficial
Moderate
Lactobacillus rhamnosus UALr-18Improved Meat ColorBeneficial
Moderate
Lactobacillus rhamnosus UALr-18Improved Thigh Muscle pH ValueBeneficial
Moderate
Lactobacillus rhamnosus UALr-18Increased Cecal Lactobacilli LevelsBeneficial
Large
Lactobacillus rhamnosus UALr-18Increased Muscle Fat ContentBeneficial
Moderate
Lactobacillus rhamnosus UALr-18Reduced Ammonia EmissionsBeneficial
Moderate
Lactobacillus rhamnosus UALr-18Reduced Cecal Enterococcus LevelsBeneficial
Moderate
Lactobacillus rhamnosus UALr-18Reduced Cecal Escherichia coliBeneficial
Large
Lactobacillus rhamnosus UALr-18Reduced Cecal pH LevelsBeneficial
Moderate
Lactobacillus rhamnosus UALr-18Reduced Muscle HydrationBeneficial
Moderate
Lactobacillus rhamnosus UALr-18Reduced Plasma Ammonia LevelsBeneficial
Moderate

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