Effect of β-Mannanase Supplementation in Conventional Diets on the Performance, Immune Competence and Intestinal Quality of Broilers Challenged With Eimeria sp.

Scapini, Lidiane Boareto; Cristo, Adrieli Braga de; Schmidt, J.; Buzim, R.; Nogueira, Lílian; Palma, S. C.; Fernandes, Jovanir Inês Müller

doi:10.3382/japr/pfz066

Cited by 16 publications

(13 citation statements)

References 20 publications

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“…A few studies have investigated the utility of feed enzymes as a strategic alternative to complement deficient enzymes due to coccidiosis infection. [104,198]. Dietary supplementation with β-mannanase in chickens challenged with commercial live-attenuated coccidiosis vaccine (20x) increased the proportions of beneficial intestinal groups, such as Lactobacillus, Ruminococcaceae, and Akkermansia, and decreased Bacteroides, which is responsible for poor feed efficiency in chickens [104].…”

Section: Organic Acids and Other Feed Additivesmentioning

confidence: 99%

“…Dietary supplementation with β-mannanase in chickens challenged with commercial live-attenuated coccidiosis vaccine (20x) increased the proportions of beneficial intestinal groups, such as Lactobacillus, Ruminococcaceae, and Akkermansia, and decreased Bacteroides, which is responsible for poor feed efficiency in chickens [104]. Furthermore, although it did not affect the productive performance of chickens, supplementation with β-mannanase improved intestinal health, measured by improved villi, namely the crypt proportion and increased number of goblet cells in the intestinal mucosa [198]. Dersjant-Li et al indicated that the damage and performance losses induced by coccidiosis could be reduced by using enzymes in combination with Bacillus spp.…”

Section: Organic Acids and Other Feed Additivesmentioning

confidence: 99%

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Coccidiosis: Recent Progress in Host Immunity and Alternatives to Antibiotic Strategies

Lee

Lillehoj

2022

Vaccines

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Coccidiosis is an avian intestinal disease caused by several distinct species of Eimeria parasites that damage the host’s intestinal system, resulting in poor nutrition absorption, reduced growth, and often death. Increasing evidence from recent studies indicates that immune-based strategies such as the use of recombinant vaccines and various dietary immunomodulating feed additives can improve host defense against intracellular parasitism and reduce intestinal damage due to inflammatory responses induced by parasites. Therefore, a comprehensive understanding of the complex interactions between the host immune system, gut microbiota, enteroendocrine system, and parasites that contribute to the outcome of coccidiosis is necessary to develop logical strategies to control coccidiosis in the post-antibiotic era. Most important for vaccine development is the need to understand the protective role of the local intestinal immune response and the identification of various effector molecules which mediate anti-coccidial activity against intracellular parasites. This review summarizes the current understanding of the host immune response to coccidiosis in poultry and discusses various non-antibiotic strategies which are being developed for coccidiosis control. A better understanding of the basic immunobiology of pertinent host–parasite interactions in avian coccidiosis will facilitate the development of effective anti-Eimeria strategies to mitigate the negative effects of coccidiosis.

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Section: Organic Acids and Other Feed Additivesmentioning

confidence: 99%

Section: Organic Acids and Other Feed Additivesmentioning

confidence: 99%

Coccidiosis: Recent Progress in Host Immunity and Alternatives to Antibiotic Strategies

Lee

Lillehoj

2022

Vaccines

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“…Besides enhancing the growth performances and promoting health of poultry, feed supplementation with Bacillus could also improve the meat quality (increase in meat lightness, redness and yellowness) [117] and eggs (increase in eggshell strength and thickness, yolk color score, Haugh unit, and decrease in cholesterol content of yolk) [118]. Bacillus can limit influence from toxin Phytase Bacillus subtilis US417 Phytic acid Releases phosphorus (P) from phytates contributing to better bioavailability of P and vital minerals and enhancement of growth performance and health of animals along with environment protection [109] Keratinase Bacillus subtilis S14 Keratin Degrades keratin and improve digestion [110] Mannanase Bacillus amyloliquefaciens 10A1 Mannans Contributes to degradation of NSP and decreases intestinal chyme viscosity increasing animal production performance [111] in contaminated broilers feed and decrease emission of NH 3 from poultry manure [23]. The increase in gut permeability caused by several enteric pathogens such as Salmonella spp results damage in the intestinal tight junction that referred as "'leaky gut"' [119].…”

Section: In Poultrymentioning

confidence: 99%

Bacillus Species as Direct-Fed Microbial Antibiotic Alternatives for Monogastric Production

Bahaddad

Almalki

Alghamdi

et al. 2022

Probiotics & Antimicro. Prot.

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Antibiotic growth promoters have been utilized for long time at subtherapeutic levels as feed supplements in monogastric animal rations. Because of their side-effects such as antibiotic resistance, reduction of beneficial bacteria in the gut, and dysbiosis, it is necessary to look for non-therapeutic alternatives. Probiotics play an important role as the key substitutes to antibacterial agents due to their many beneficial effects on the monogastric animal host. For instance, enhancement of the gut microbiota balance can contribute to improvement of feed utilization efficiency, nutrients absorption, growth rate, and economic profitability of livestock. Probiotics are defined as “live microorganisms that, when administered in adequate amounts, confer a health benefit on the host.” They are available in diverse forms for use as feed supplements. Their utilization as feed additives assists in good digestion of feed ingredients and hence, making the nutrients available for promoting growth. Immunity can also be enhanced by supplementing probiotics to monogastrics diets. Moreover, probiotics can help in improving major meat quality traits and countering a variety of monogastric animals infectious diseases. A proper selection of the probiotic strains is required in order to confer optimal beneficial effects. The present review focuses on the general functional, safety, and technological screening criteria for selection of ideal Bacillus probiotics as feed supplements as well as their mechanism of action and beneficial effects on monogastric animals for improving production performance and health status. Supplementary Information The online version contains supplementary material available at 10.1007/s12602-022-09909-5.

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“…Huawei has won its unique market position with its firm corporate culture and position, and its service has been well received by the service providers and has not affected Huawei's own reputation because of its blindness and pursuit of interests. In modern enterprises, departments are sharply divided and have different roles [1]. In any organization, middle managers in the middle position should keep up with the leadership requirements of superiors, and manage the staff at the grass-roots level below.…”

Section: Introductionmentioning

confidence: 99%

Research on the Competence and Quality Model of Huawei’s Middle Managers

Zhang¹

2021

Proceedings of the 2021 International Conference on Enterprise Management and Economic Development (ICEMED 2021)

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Middle managers are the backbone of enterprise development. How to effectively manage and develop middle managers in large enterprises is an important subject. Competence quality can be a more comprehensive measure of whether managers have the corresponding quality, can provide comprehensive and detailed selection and management standards, help effective management and development of managers, more efficient play their role. This paper gives a theoretical overview of the competence quality model, analyzes the current situation of Huawei's middle-level staff management, points out the existing problems, discusses the purpose of the company's mid-level employee competence quality model, extracts the competence quality of the company's middle-level employees from the perspective of enterprise strategy, corporate culture and job characteristics, and finally designs the middle-level employee competence quality model, and points out the application area of the model.

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Effect of β-Mannanase Supplementation in Conventional Diets on the Performance, Immune Competence and Intestinal Quality of Broilers Challenged With Eimeria sp.

Cited by 16 publications

References 20 publications

Coccidiosis: Recent Progress in Host Immunity and Alternatives to Antibiotic Strategies

Coccidiosis: Recent Progress in Host Immunity and Alternatives to Antibiotic Strategies

Bacillus Species as Direct-Fed Microbial Antibiotic Alternatives for Monogastric Production

Research on the Competence and Quality Model of Huawei’s Middle Managers

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