摘要
The prolonged use of antibiotics has led to the development of resistant bacteria and also led to accumulation of antibiotic residue in the poultry feed, this ultimately led to the prohibition of antibiotics as growth enhancers in animal production. Thus, there was a dire need for alternate sources to help in poultry production. Recently, probiotics and prebiotics claimed to be effective alternatives to antibiotics in the poultry. The objective of this study is to investigate the effect of different probiotics and prebiotics on the performance of broilers. The study involved 2 broiler cycles, 1 during winter and 1 during summer with a total of 425 1-day-old Cobb 500 broiler chicks for each cycle. They were allotted to 5 experimental treatments. The probiotics were Bacillus coagulans (1 g/kg dried culture) and Lactobacillus (1 g/kg dried culture of 12 commercial strains). The prebiotics included fructo-oligosaccharides (FOS) (5 g/kg) and mannan-oligosaccharide (MOS) derived from Saccharomyces cerevisiae (5 g/kg). The results showed that there was no effect of the different probiotics and prebiotics on the production performance of broilers. There was increased weight of the thymus in the control group. In cycle 1, the panelists indicated that the smell, color, taste, and texture of the cooked meat were acceptable, and that there were no significant differences between the different groups. There was no significant effect of the different diets on the biochemical parameters of the blood among the experimental groups at 3- and 5-wk of age. Phytohaemaglutinin test showed that dietary FOS and MOS induced higher cellular response than the other treatments (P = 0.04) in the first cycle. In the second cycle, the results revealed that dietary FOS induced higher cellular response than the other treatments (P = 0.019). The used experimental treatments have a positive effect on microbial count in 5-week-old broilers. There was no Salmonella sp. recorded using the experimental treatments in the first cycle, and the growth of E. coli was reduced significantly. In the second cycle, all treatments in 3-week-old broilers did not affect the count of both lactic acid bacteria (LAB) and E. coli. At 5-week-old of the same cycle, the bacterial count of E. coli increased even with control, whereas Salmonella growth was inhibited. The pH value was driven toward acidity in all of the treatments. Probiotics and prebiotics can be used in chicken feed safely and without any adverse effects on the productive parameters and immune status of the flock.
摘要译文
长时间使用抗生素已导致产生抗药性细菌，并导致家禽饲料中残留了抗生素，这最终导致禁止在动物生产中使用抗生素作为生长促进剂。因此，迫切需要替代来源来帮助家禽生产。最近，益生菌和益生元声称是家禽中抗生素的有效替代品。这项研究的目的是研究益生菌和益生元对肉鸡生产性能的影响。该研究涉及2个肉鸡周期，冬季1个，夏季1个，每个周期共有425只1天大的Cobb 500只肉鸡。他们被分配了5种实验方法。益生菌为凝结芽孢杆菌（12 g的干培养物）和乳酸杆菌（12 g的12株商业菌株的干培养物）。益生元包括果糖寡糖（FOS）（5 g / kg）和源自酿酒酵母（Saccharomyces cerevisiae）的甘露糖低聚糖（MOS）（5 g / kg）。结果表明，不同的益生菌和益生元对肉鸡的生产性能没有影响。对照组的胸腺重量增加。在第一个周期中，小组成员表明熟肉的气味，颜色，味道和质地是可以接受的，并且不同组之间没有显着差异。在3周龄和5周龄的实验组中，不同饮食对血液的生化参数没有显着影响。植物血凝素试验表明，在第一个周期中，饮食中的FOS和MOS诱导的细胞反应高于其他治疗（P = 0.04）。在第二个周期中，结果表明，饮食中的FOS引起的细胞反应高于其他治疗（P = 0.019）。使用的实验方法对5周龄肉鸡的微生物数量有积极影响。没有沙门氏菌。在第一个周期中使用实验方法进行记录，大肠杆菌的生长显着降低。在第二个周期中，三周龄肉鸡的所有处理均不影响乳酸菌（LAB）和大肠杆菌的数量。在同一周期的5周龄，即使有对照，大肠杆菌的细菌计数也会增加，而沙门氏菌的生长却受到抑制。在所有处理中，pH值都趋向酸性。益生菌和益生元可以安全地用于鸡饲料中，并且不会对鸡群的生产参数和免疫状况产生任何不利影响。
H*;A*;T[†];S[‡];N[‡];T[‡];G*;S*;A*. Effect of dietary probiotics and prebiotics on the performance of broiler chickens[J]. Poultry Science, 2019,98(10): 4465-4479