Acta Veterinaria et Zootechnica Sinica ›› 2024, Vol. 55 ›› Issue (6): 2530-2539.doi: 10.11843/j.issn.0366-6964.2024.06.024

• Animal Nutrition and Feeds • Previous Articles     Next Articles

Effects of Lactobacillus plantarum and Lactobacillus plantarum Postbiotics on Growth Performance, Immune Status and Intestinal Health of Growing Female Minks

Yalin LI(), Shibo ZHEN, Lin CAO, Fengxue SUN, Lihua WANG*()   

  1. College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China
  • Received:2024-09-19 Online:2024-06-23 Published:2024-06-28
  • Contact: Lihua WANG E-mail:859847078@qq.com;lhwang2007@sina.com

Abstract:

This experiment was conducted to study the effects of Lactobacillus plantarum and Lactobacillus plantarum postbiotics on growth performance, immune status and intestinal health of growing female minks. A total of 40 gray female minks at 12 weeks of age were selected and divided into 4 groups with 10 replicates per group. The minks were fed basal diet, basal diet supplemented with 0.1% Lactobacillus plantarum (viable bacteria number > 106 CFU·mL-1), basal diet supplemented with 0.3% postbiotics of Lactobacillus plantarum, basal diet supplemented with 0.1% Lactobacillus plantarum and 0.3% postbiotics of Lactobacillus plantarum, respectively. The pre-experimental period lasted for 1 week, and the experimental period lasted for 8 weeks. During the experiment, bodyweight and feed intake were recorded to determine the growth performance. At the end of the experiment, blood, jejunum tissue, jejunal content were collected to determine the immune indexes and microflora. The results were showed as follows: 1) Compared to the minks in group without Lactobacillus plantarum, minks in Lactobacillus plantarum group had greater body weight at week 4 and week 8 (P < 0.05), average daily gain and average daily feed intake for the first 4 weeks and the entire 8 weeks (P < 0.05), sIgA content in jejunal mucosa (P < 0.05), and had less IgG content in serum and TNF-α content in jejunal mucosa (P < 0.05). 2) Minks supplemented with Lactobacillus plantarum postbiotics had greater IgG content in serum and IFN-γ content in jejunal mucosa (P < 0.05), and less IL-2, IL-12 and TNF-α content in jejunal mucosa (P < 0.05). 3) Neither Lactobacillus plantarum nor postbiotics had significant effects on Alpha diversity index of intestinal flora for growing female minks (P>0.05). Minks in Lactobacillus plantarum group had less proportion of Sporosarcina, Aminobacter and Agathobacter, and greater proportion of Fastidiosipila in rectal flora than minks in group without Lactobacillus plantarum (P < 0.05). Minks in the postbiotics groups had greater proportion of Staphylococcus, Weissella, Brevibacterium, Dietzia, Brachybacterium, Carnobacterium, Aerococcus and Sphingomonas, and less proportion of Kocuria, Plesiomonas, unclassified_f_Lachnospiraceae, Sanguibacter, Microbacterium, Glutamicibacter and Paracoccus in rectal flora than minks in group without postbiotics (P < 0.05). 4) Interactions between Lactobacillus plantarum and Lactobacillus plantarum postbiotics were significant for serum IgA and IgM contents, jejunum IL-2, IL-10, TNF-α, IL-8 levels (P < 0.05). In conclusion, dietary Lactobacillus plantarum supplementation could improve the growth performance of female minks, both Lactobacillus plantarum and Lactobacillus plantarum postbiotics improved the immune function of females and increase the relative abundance of beneficial bacteria.

Key words: Lactobacillus plantarum, Lactobacillus plantarum postbiotics, mink, growth performance, immune status, intestinal health

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