Comparison of performance and feed digestibility of the non-antibiotic feed supplement (Novacid) and an antibiotic growth promoter in broiler chickens

Manafi, M.; Mahdi, Hedayati; Pirany, N.; Omede, A. A.

doi:10.3382/ps/pey437

Cited by 21 publications

(18 citation statements)

References 32 publications

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“…Antibiotics have been widely used to enhance the growth of piglets, as well as to reduce their susceptibility to diseases ( 5 ). However, the overuse and abuse of antibiotics have resulted in the emergence of bacterial resistance and drug residues in animal-derived products, thereby endangering human health ( 6 ). As a result, there is a need to develop antibiotic substitutes.…”

Section: Popular Scientific Summarymentioning

confidence: 99%

Effects of the antimicrobial peptide WK3 on diarrhea, growth performance and intestinal health of weaned piglets challenged with enterotoxigenic Escherichia coli K88

Zhang

Guo

Zhan

et al. 2021

Food & Nutrition Research

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Background: Antibiotics are very effective for treating diarrhea in weaned pigs, but the global prohibition of antibiotics makes it urgent to find an alternative to antibiotics. Objective: An experiment was conducted to determine the antimicrobial activity of a linear trpzip-like β-hairpin antimicrobial peptide WK3 in vivo and to assess its effects on growth performance and intestinal health. Design: Thirty-two piglets were weaned at 21 days and housed in individual metabolic cages, which were randomly divided into four groups and were maintained on a corn-soybean meal-based basal diet. Group 1 included a blank group. Groups 2, 3, and 4 were orally infected by feeding with Enterotoxigenic Escherichia coli (ETEC) K88, which was followed by saline treatment (group 2), enrofloxacin injection at a dose of 2.5 mg/ kg (group 3), and WK3 injection at a dose of 2 mg/kg (group 4). The experiment lasted for 6 days, and feed and water were provided ad libitum. Results: Both WK3 and enrofloxacin effectively attenuated diarrhea and improved growth performance of piglets. Compared with the control group, WK3 significantly improved the villus height in the ileum (P < 0.05) but did not affect the villus height in the duodenum or jejunum. Additionally, we did not observe any obvious difference in crypt depth or villus height/crypt depth among the duodenum, jejunum and ileum (P > 0.05). WK3 also reduced the numbers of Enterococcus spp (P < 0.01) in the cecal contents, and the number of Enterobacterium spp tended to decrease (0.05 < P < 0.1). Moreover, the jejunal mucosa of the WK3 group exhibited lower interleukin-1α (IL-1a; P < 0.01), toll-like receptors-4 (TLR-4; P < 0.05), and myeloid differentiation primary response 88 (MyD88; P < 0.01) messenger ribonucleic acid (mRNA) expression levels. The jejunum of the WK3 group also exhibited an increased antioxidant capacity, reduced concentration of malondialdehyde (MDA; P < 0.05), and enhanced superoxide dismutase (SOD) activity (P < 0.05). Conclusions: WK3 has the potential to replace antibiotics as a new generation feed additive.

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Section: Popular Scientific Summarymentioning

confidence: 99%

Effects of the antimicrobial peptide WK3 on diarrhea, growth performance and intestinal health of weaned piglets challenged with enterotoxigenic Escherichia coli K88

Zhang

Guo

Zhan

et al. 2021

Food & Nutrition Research

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“…Cocktail-like additives that include a combination of organic acids, oligosaccharides and plant extracts are effective in influencing the microbiome as they have been shown to reduce cecal E. coli and Salmonella counts (Manafi et al 2019). Askelson et al (2018) used an in-feed probiotic-enzyme blend to manipulate the chicken microbiome and increase lactic acid bacteria while reducing Clostridium.…”

Section: Cocktail Blendsmentioning

confidence: 99%

Mandated restrictions on the use of medically important antibiotics in broiler chicken production in Canada: implications, emerging challenges, and opportunities for bolstering gastrointestinal function and health — a review

Bean-Hodgins

Kiarie

2021

Can. J. Anim. Sci.

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Chicken Farmers of Canada has been progressively phasing out prophylactic use of antibiotics in broiler chicken production. Consequently, hatcheries, veterinarians, and nutritionists have been mandated to contend with less reliance on use of preventive antibiotics. A topical concern is the increased risk of proliferation of enteric pathogens leading to poor performance, increased mortality and compromised welfare. Moreover, the gut harbors several taxa such as Campylobacter and Salmonella capable of causing significant illnesses in humans via contaminated poultry products. This has created opportunity for research and development of dietary strategies designed to modulate gastrointestinal environment for enhanced performance and food safety. Albeit with inconsistent responses, literature data suggests that dietary strategies such as feed enzymes, probiotics/prebiotics and phytogenic feed additives can bolster gut health and function in broiler chickens. However, much of the efficacy data was generated at controlled research settings that vary significantly with the complex commercial broiler production operations due to variation in dietary, health and environmental conditions. This review will summarize implications of mandated restrictions on the preventative use of antibiotics and emerging Canadian broiler production programs to meet processor specifications. Challenges and opportunities for integrating alternative dietary strategies in commercial broiler production settings will be highlighted.

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“…[2][3] Several countries have made laws and regulations to respond to the problem and antibiotics usage reduction is an inevitable development trend in the future of the feed industry. 4 Recently, many studies have revealed that peptides perform several benefits for livestock and poultry, such as enhancing immunity, improving intestinal microenvironment and promoting muscle growth. Peptides can undertake partial functions of antibiotics and thus lead to a reduction in antibiotic usage.…”

Section: Introductionmentioning

confidence: 99%

Application of ultrasound technology in the field of solid‐state fermentation: increasing peptide yield through ultrasound‐treated bacterial strain

Wang

Lü

et al. 2021

J Sci Food Agric

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BACKGROUND: The increase of peptide yield contributed to reducing the usage of antibiotics in solid-state fermented feed. Ultrasound technology is used in the field of liquid-state fermentation to improve yield of fermented products but has not been utilized in the field of solid-state fermentation (SSF). The main objective of this study was to investigate the feasibility of improving peptide yield in SSF products through ultrasound-treated bacterial strain.RESULTS: The highest peptides content in soybean meal SSF products reached 153.28 mg g −1 , which increased by 15.05% compared with the control. This content value was acquired through treating the bacteria of Bacillus amyloliquefaciens by ultrasound before inoculating into soybean meal under the optimized mode and parameters (simultaneous dual-frequency ultrasound mode, frequency combination of 40/60 kHz, total power density of 40 W L −1 , time of 20 min, pulse-on and pulseoff times of 40 and 60 s, delayed inoculation time of 0 h). Fermenting with ultrasound-treated bacterial strain can effectively increase peptide yield, biomass and protease activity of soybean meal fermented products during the SSF prophase. After treating by ultrasound, the latent phase and logarithmic phase of the bacterial strain shortened by 1 and 3 h while the generation time reduced by 23.64%. In qualitative test of protease activity, diameter ratio (DR) value of ultrasound-treated bacterial cells enlarged by 12.0% compared with the control. CONCLUSION: Peptide yield of soybean meal SSF products can be improved through ultrasound-treated bacterial inoculum, which attributed to the promoting effect of ultrasound treatment on growth activity and protease production capability of bacterial cells.

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Comparison of performance and feed digestibility of the non-antibiotic feed supplement (Novacid) and an antibiotic growth promoter in broiler chickens

Cited by 21 publications

References 32 publications

Effects of the antimicrobial peptide WK3 on diarrhea, growth performance and intestinal health of weaned piglets challenged with enterotoxigenic Escherichia coli K88

Effects of the antimicrobial peptide WK3 on diarrhea, growth performance and intestinal health of weaned piglets challenged with enterotoxigenic Escherichia coli K88

Mandated restrictions on the use of medically important antibiotics in broiler chicken production in Canada: implications, emerging challenges, and opportunities for bolstering gastrointestinal function and health — a review

Application of ultrasound technology in the field of solid‐state fermentation: increasing peptide yield through ultrasound‐treated bacterial strain

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