Effects of lactobacillus plantarum ZJ316 on pig growth and pork quality

BMC Veterinary Research

Qing Gu¹  Xin Wang²  Dafeng Song¹  Xiuyu Lou¹  Xiaona Wang¹  Yeshi Yin²  Cheng Suo¹ 

[1] Department of Biotechnology, College of Food Science and Biotechnology, Zhejiang Gongshang University, No. 149, Jiaogong Road, Hangzhou, 310035, China;Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, No. 198, Shiqiao Road, Hangzhou, 310021, China

关键词: Pork quality;    Pig;    Lactobacillus plantarum;    Probiotics;   

Others  :  1119798
DOI  :  10.1186/1746-6148-8-89

 received in 2011-12-30, accepted in 2012-06-14,  发布年份 2012

【 摘 要 】

Background

Lactobacillus plantarum is a plant-associated bacterial species but it has also been found in human, mouse and porcine gastrointestinal tracts. It can ferment a broad spectrum of plant carbohydrates; it is tolerant of bile salts and low pH, and it has antagonistic potential against intestinal pathogens. However, experiments reporting the use of L. plantarum as a probiotic are limited. In this study, the effects of L. plantarum ZJ316 isolated from infant fecal samples on pig growth and pork quality were investigated.

Results

One hundred and fifty newly weaned pigs were selected randomly and divided into five groups. Group 1 was fed a diet supplemented with the antibiotic mequindox; Groups 2, 3 and 4 were fed a diet supplemented with L. plantarum and no antibiotic; and Group 5 was fed a mixture of mequindox and L. plantarum. After a 60 days initial treatment, samples were collected for evaluation. The results showed that, the L. plantarum ZJ316 has probiotic effects on pig growth and that these effects are dose dependent. The effects of a dose of 1 × 10⁹ CFU/d were more pronounced than those of a dose of 5 × 10⁹ CFU/d or 1 × 10¹⁰ CFU/d. In Group 2 (1 × 10⁹ CFU/d), the diarrhea (p = 0.000) and mortality rates (p = 0.448) were lower than in antibiotic-treated pigs (Group 1), and the daily weight gain (p = 0.001) and food conversion ratios were better (p = 0.005). Improved pork quality was associated with Lactobacillus treatment. pH (45 min, p = 0.020), hardness (p = 0.000), stickiness (p = 0.044), chewiness (p = 0.000), gumminess (p = 0.000) and restoring force (p = 0.004) were all significantly improved in Lactobacillus-treated pigs (Group 2). Although we found that L. plantarum exerted probiotic effects on pig growth and pork quality, the mechanisms underlying its action require further study. Polymerase chain reaction-denaturing gradient gel electrophoresis results showed that the gut bacterial communities in Lactobacillus- and antibiotic-treated pigs were very similar and the quantity of L. plantarum ZJ316 was below the detection limits of DGGE-band sequencing. The concentration of short-chain fatty acids in Lactobacillus- and antibiotic-treated fecal samples were not significantly different (p = 0.086). However, the villus height of ilea (p = 0.003), jejuna (p = 0.000) and duodena (p = 0.036) were found to be significantly improved by Lactobacillus treatment.

Conclusion

L. plantarum ZJ316 was found to have probiotic effects, improving pig growth and pork quality. The probiotic mechanism might not involve L. plantarum colonization and alteration of the gut bacterial community. Rather, it might be related to the inhibition of the growth of opportunistic pathogens and promotion of increased villus height.

【 授权许可】

   
2012 Suo et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1 .

Figure 2 .

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