Effects of Lactobacillus Lactis Supplementation on Growth Performance, Hematological Parameters, Meat Quality and Intestinal Flora in Growing-Finishing Pigs

Abstract

Objective: The study was conducted to assess the effect of supplementation with Lactobacillus lactis (LL) on growth performance, hematological parameters, meat quality and intestinal flora in pigs from growing until slaughter. Methods: A total of 72 growing pigs (30.46 ± 3.08 kg) were randomly assigned to 3 groups (including 3 pens for each group, with 8 pigs in each pen). The three treatments comprised a basal diet (O-0) and two experimental diets supplemented for 14 weeks with 0.01% (O-100) and 0.03% (O-300) LL, respectively. Results: The final body weights of the pigs in the O-100 and O-300 groups were significantly higher (p < 0.05) than those of the O-0 group. In the grower phase, the average daily weight gain (ADG) and average daily feed intake (ADFI) of pigs fed the O-300 diet were higher (p < 0.05) than those of pigs fed the O-0 diet during the grower phase. BUN and MDA were significantly higher (p < 0.05 for all) in the O-0 group than in the O-100 and O-300 groups during the grower phase. No difference (p > 0.05) was observed in the hematological parameters among the three groups during the finisher phase. Counts of LL in the stomach were significantly higher (p < 0.05) in the O-300 group than in the O-0 group. Counts of Escherichia coli in the jejunum were significantly higher (p < 0.05) in the O-0 group than in the O-300 group. Furthermore, the hardness, cohesiveness, gumminess and resilience of longissimus dorsi muscle collected from pigs fed the O-300 diet were higher (p < 0.01; p = 0.024; p = 0.003; p = 0.014, respectively) than those of tissue collected from pigs fed the O-0 diet. Conclusion: Dietary LL supplementation increased final body weight, increased ADG in the grower phase and enhanced meat quality.

Сriterion for selection of feed additives with different biological effect in the feeding of growing pigs

“…The results of our research show an increase in the growth of lactobacilli in pigs of the second group, having a positive effect on the total daily weight growth of growing pigs. The obtained data are consistent with the results of Duan et al (Duan et al, 2023). Instead, Huang et al demonstrated that the consumption of probiotics with lactobacilli in the composition effectively affects daily weight growth only during the first two weeks of life (Huang et al, 2004).…”

Safety Evaluation of an Intranasally Applied Cocktail of Lactococcus lactis Strains in Pigs

“…Yu, et al [26] reported transient improvements in ADG and feed efficiency in newly weaned pigs supplemented with L. lactis in feed. Similarly, in a study by Duan, et al [27] grower-finisher pigs supplemented with L. lactis probiotic over 14 weeks, also demonstrated improved ADG during the grower period and improved final body weight at slaughter. The mode of administration is likely the reason for the differing outcomes, with orally administered probiotics more likely to reach the gastrointestinal tract where they can have a greater impact on growth performance.…”

The Effects of Microbial Additive Supplementation on Growth Performance, Blood Metabolites, Fecal Microflora, and Carcass Characteristics of Growing–Finishing Pigs

“…BUN levels generally decrease when the protein mass and absorption are reduced [47]. Duan et al [48] reported that the grower phase, the control group (0%), had significantly lower BUN values than the 0.1% and 0.3% Lactobacillus lactis groups, whereas no difference was observed in the BUN values among the three groups for the finisher phase. For example, in the digestive tract, probiotics increase ammonia fixation and alleviate decreases in amino acid availability, which can be reduced by increasing the concentration of blood urea [49].…”