A field study of Bacillus licheniformis-fermented products on growth performance and faecal microbiota of weaning piglets

IF 0.7 4区 农林科学 Q3 AGRICULTURE, DAIRY & ANIMAL SCIENCE
K. Lin, Y. Yu
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引用次数: 0

Abstract

This study investigated the effects of Bacillus licheniformis-fermented products (BLFPs) on the growth performance, faecal microbiota, and antibiotic resistance gene (ARG) expression in weaning piglets on a commercial farm. Ninety-six weaning piglets were randomly assigned to four treatments as follows: basal diet as control (C), basal diet plus 30 mg/kg of antibiotics (bacitracin methylene disalicylate) (A), basal diet plus 1 g/kg of BLFPs (F), and basal diet plus 15 mg/kg of antibiotics and 0.5 g/kg of BLFPs (AF), with six replicate pens per treatment and four pigs per pen. Results showed that, similar to antibiotics, replacing all or half the antibiotics with BLFPs improved the feed conversion ratio of weaning piglets from 15–28 d. Microbiota analysis showed that microbial community composition in the faeces showed a clear separation between groups. Replacing all the antibiotics with BLFPs increased the abundance of the genus, Streptococcus, in the faeces compared with the other groups. Half replacement of antibiotics with BLFPs increased the chloramphenicol resistance gene levels in the faeces compared with the C group, whereas full replacement of antibiotics with BLFPs reduced the streptomycin resistance gene levels compared with the C group. A trend of decreased levels of formic acid and acetic acid was observed in the group treated with BLFPs in combination with antibiotics compared with the C group. In conclusion, the field study demonstrates that replacing all or half the antibiotics with BLFPs can improve feed conversion ratio, modulate faecal microbiota, and alter ARG expression in weaning piglets.
地衣芽孢杆菌发酵产物对断奶仔猪生长性能和粪便微生物群的影响
本研究旨在研究地衣芽孢杆菌发酵产物(BLFPs)对断奶仔猪生长性能、粪便微生物群和抗生素耐药基因(ARG)表达的影响。试验96头断奶仔猪随机分为4个处理,分别为基础饲粮为对照(C)、基础饲粮加抗生素(亚甲二水杨酸杆菌肽)30 mg/kg (A)、基础饲粮加1 g/kg blfp (F)、基础饲粮加15 mg/kg抗生素和0.5 g/kg blfp (AF),每个处理6个重复栏,每个栏4头猪。结果表明,与抗生素类似,用blfp替代全部或一半抗生素可提高15-28 d断奶仔猪的饲料转化率。微生物群分析显示,粪便微生物群落组成在组间有明显的分离。与其他组相比,用BLFPs替代所有抗生素增加了粪便中链球菌属的丰度。与C组相比,用BLFPs替代一半抗生素增加了粪便中氯霉素耐药基因水平,而用BLFPs完全替代抗生素与C组相比降低了链霉素耐药基因水平。与C组相比,BLFPs联合抗生素治疗组有降低甲酸和乙酸水平的趋势。综上所述,现场研究表明,用blfp替代全部或一半抗生素可提高断奶仔猪的饲料转化率,调节粪便微生物群,改变ARG表达。
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来源期刊
South African Journal of Animal Science
South African Journal of Animal Science 农林科学-奶制品与动物科学
CiteScore
1.50
自引率
0.00%
发文量
39
审稿时长
>36 weeks
期刊介绍: The South African Journal of Animal Science is an open access, peer-reviewed journal for publication of original scientific articles and reviews in the field of animal science. The journal publishes reports of research dealing with production of farmed animal species (cattle, sheep, goats, pigs, horses, poultry and ostriches), as well as pertinent aspects of research on aquatic and wildlife species. Disciplines covered nutrition, genetics, physiology, and production systems. Systematic research on animal products, behaviour, and welfare are also invited. Rigorous testing of well-specified hypotheses is expected.
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