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Yang W, Li J, Yao Z, Li M. A review on the alternatives to antibiotics and the treatment of antibiotic pollution: Current development and future prospects. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:171757. [PMID: 38513856 DOI: 10.1016/j.scitotenv.2024.171757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 02/08/2024] [Accepted: 03/14/2024] [Indexed: 03/23/2024]
Abstract
Antibiotics, widely used in the fields of medicine, animal husbandry, aquaculture, and agriculture, pose a serious threat to the ecological environment and human health. To prevent antibiotic pollution, efforts have been made in recent years to explore alternative options for antibiotics in animal feed, but the effectiveness of these alternatives in replacing antibiotics is not thoroughly understood due to the variation from case to case. Furthermore, a systematic summary of the specific applications and limitations of antibiotic removal techniques in the environment is crucial for developing effective strategies to address antibiotic contamination. This comprehensive review summarized the current development and potential issues on different types of antibiotic substitutes, such as enzyme preparations, probiotics, and plant extracts. Meanwhile, the existing technologies for antibiotic residue removal were discussed under the scope of application and limitation. The present work aims to highlight the strategy of controlling antibiotics from the source and provide valuable insights for green and efficient antibiotic treatment.
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Affiliation(s)
- Weiqing Yang
- School of Ecology and Environment, Beijing Technology and Business University, Beijing 100048, China
| | - Jing Li
- School of Ecology and Environment, Beijing Technology and Business University, Beijing 100048, China; State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing 100048, China.
| | - Zhiliang Yao
- School of Ecology and Environment, Beijing Technology and Business University, Beijing 100048, China; State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing 100048, China
| | - Mi Li
- Center for Renewable Carbon, School of Natural Resources, The University of Tennessee, Knoxville, TN 37996, USA
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Nie M, Khalid F, Hu Q, Khalid A, Wu Q, Huang S, Wang Z. Site-Directed Mutagenesis: Improving the Acid Resistance and Thermostability of Bacillus velezensis α-Amylase and Its Preliminary Feed Application. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:10487-10496. [PMID: 38683727 DOI: 10.1021/acs.jafc.4c01630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
The current study aimed to improve the acid resistance and thermostability of Bacillus velezensis α-amylase through site-directed mutagenesis, with a specific focus on its applicability to the feed industry. Four mutation sites, P546E, H572D, A614E, and K622E, were designed in the C domain of α-amylase, and three mutants, Mut1 (E), Mut2 (ED), and Mut3 (EDEE), were produced. The results showed that the specific activity of Mut3 was 50 U/mg higher than the original α-amylase (Ori) after incubation at 40 °C for 4 h. Compared to Ori, the acid resistance of Mut3 showed a twofold increase in specific activity at pH 2.0. Moreover, the results of preliminary feed hydrolysis were compared between Ori and Mut3 by designing three factors, three levels of orthogonal experiment for enzymatic hydrolysis time, feed quantity, and amount of amylase. It was observed that the enzymatic hydrolysis time and feed quantity showed an extremely significant difference (p < 0.01) in Mut3 compared to Ori. However, the amount of enzyme showed significant (p < 0.05) improvement in the enzymatic hydrolysis in Mut3 as compared to Ori. The study identified Mut3 as a promising candidate for the application of α-amylase in the feed industry.
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Affiliation(s)
- Ming Nie
- College of Life Science, Anhui Agricultural University, No. 130, Changjiang Road, Hefei 230036, Anhui, People's Republic of China
- School of Chemical and Biomolecular Engineering, Faculty of Engineering, The University of Sydney, Camperdown, NSW 2006, Australia
- School of Food and Bioengineering, Hefei University of Technology, Hefei 230009, Anhui, People's Republic of China
| | - Fatima Khalid
- College of Life Science, Anhui Agricultural University, No. 130, Changjiang Road, Hefei 230036, Anhui, People's Republic of China
| | - Qian Hu
- College of Life Science, Anhui Agricultural University, No. 130, Changjiang Road, Hefei 230036, Anhui, People's Republic of China
| | - Anam Khalid
- College of Life Science, Anhui Agricultural University, No. 130, Changjiang Road, Hefei 230036, Anhui, People's Republic of China
| | - Qi Wu
- College of Life Science, Anhui Agricultural University, No. 130, Changjiang Road, Hefei 230036, Anhui, People's Republic of China
| | - Shoujun Huang
- College of Life Science, Anhui Agricultural University, No. 130, Changjiang Road, Hefei 230036, Anhui, People's Republic of China
| | - Zaigui Wang
- College of Life Science, Anhui Agricultural University, No. 130, Changjiang Road, Hefei 230036, Anhui, People's Republic of China
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Motahar SFS, Tiyoula FN, Motamedi E, Zeinalabedini M, Kavousi K, Ariaeenejad S. Computational Insights into the Selecting Mechanism of α-Amylase Immobilized on Cellulose Nanocrystals: Unveiling the Potential of α-Amylases Immobilized for Efficient Poultry Feed Hydrolysis. Bioconjug Chem 2023; 34:2034-2048. [PMID: 37823388 DOI: 10.1021/acs.bioconjchem.3c00304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
The selection of an appropriate amylase for hydrolysis poultry feed is crucial for achieving improved digestibility and high-quality feed. Cellulose nanocrystals (CNCs), which are known for their high surface area, provide an excellent platform for enzyme immobilization. Immobilization greatly enhances the operational stability of α-amylases and the efficiency of starch bioconversion in poultry feeds. In this study, we immobilized two metagenome-derived α-amylases, PersiAmy2 and PersiAmy3, on CNCs and employed computational methods to characterize and compare the degradation efficiencies of these enzymes for poultry feed hydrolysis. Experimental in vitro bioconversion assessments were performed to validate the computational outcomes. Molecular docking studies revealed the superior hydrolysis performance of PersiAmy3, which displayed stronger electrostatic interactions with CNCs. Experimental characterization demonstrated the improved performance of both α-amylases after immobilization at high temperatures (80 °C). A similar trend was observed under alkaline conditions, with α-amylase activity reaching 88% within a pH range of 8.0 to 9.0. Both immobilized α-amylases exhibited halotolerance at NaCl concentrations up to 3 M and retained over 50% of their initial activity after 13 use cycles. Notably, PersiAmy3 displayed more remarkable improvements than PersiAmy2 following immobilization, including a significant increase in activity from 65 to 80.73% at 80 °C, an increase in activity to 156.48% at a high salinity of 3 M NaCl, and a longer half-life, indicating greater thermal stability within the range of 60 to 80 °C. These findings were substantiated by the in vitro hydrolysis of poultry feed, where PersiAmy3 generated 53.53 g/L reducing sugars. This comprehensive comparison underscores the utility of computational methods as a faster and more efficient approach for selecting optimal enzymes for poultry feed hydrolysis, thereby providing valuable insights into enhancing feed digestibility and quality.
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Affiliation(s)
- Seyedeh Fatemeh Sadeghian Motahar
- Department of Systems and Synthetic Biology, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research Education and Extension Organization (AREEO), Karaj 31535-1897, Iran
| | - Fereshteh Noroozi Tiyoula
- Laboratory of Complex Biological Systems and Bioinformatics (CBB), Department of Bioinformatics, Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran 14176-14411, Iran
| | - Elaheh Motamedi
- Department of Nanotechnology, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research Research and Extension Organization (AREEO), Karaj 55555, Iran
| | - Mehrshad Zeinalabedini
- Department of Systems and Synthetic Biology, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research Education and Extension Organization (AREEO), Karaj 31535-1897, Iran
| | - Kaveh Kavousi
- Laboratory of Complex Biological Systems and Bioinformatics (CBB), Department of Bioinformatics, Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran 14176-14411, Iran
| | - Shohreh Ariaeenejad
- Department of Systems and Synthetic Biology, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research Education and Extension Organization (AREEO), Karaj 31535-1897, Iran
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For biotechnological applications: Purification and characterization of recombinant and nanoconjugated xylanase enzyme from thermophilic Bacillus subtilis. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2022. [DOI: 10.1016/j.bcab.2022.102478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Sharma NK, Wu SB, Morgan NK, Crowley TM. Artificial gut and the applications in poultry: A review. ANIMAL NUTRITION 2022; 10:156-166. [PMID: 35757559 PMCID: PMC9184286 DOI: 10.1016/j.aninu.2021.12.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 12/13/2021] [Accepted: 12/13/2021] [Indexed: 11/26/2022]
Abstract
Artificial gut models including both the gastric and intestinal phases have been used in poultry research for decades to predict the digestibility of nutrients, the efficacy of feed enzymes and additives, and caecal fermentation. However, the models used in the past are static and cannot be used to predict interactions between the feed, gut environment and microbiome. It is imperative that a standard artificial gut model for poultry is established, to enable these interactions to be examined without continual reliance on animals. To ensure the validity of an artificial model, it should be validated with in vivo studies. This review describes current practices in the use of artificial guts in research, their importance in poultry nutrition studies and highlights an opportunity to develop a dynamic gut model for poultry to reduce the number of in vivo experiments.
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Spray-Dried Powder Containing Chitinase and β-1,3-Glucanase with Insecticidal Activity against Ceratitis capitata (Diptera: Tephritidae). Processes (Basel) 2022. [DOI: 10.3390/pr10030587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
This study focused on obtaining a spray-dried powder containing chitinase and β-1,3-glucanase as active ingredients for the control of agricultural pests. Different carriers were tested in the spray drying of these enzymes. The effectiveness of the application of the enzymes was evaluated against Ceratitis capitata (Diptera: Tephritidae). The combination of maltodextrin (2.5% w/v), gum Arabic (2.5% w/v), and soluble starch (5.0% w/v) as carriers showed the best result of residual activity of β-1,3-glucanase (88.36%) and chitinase (69.82%), with a powder recovery of 45.49%. The optimum conditions for the operational parameters of the spray drying process were: inlet air temperature of 120 °C, drying airflow rate of 1.1 m3/min, feed flow rate of 5.8 mL/min, and nozzle air pressure of 0.4 MPa. The powder produced showed 65.6% efficiency for the control of the fly. These results demonstrated the possibility of using the spray drying process to obtain an enzymatic potential product for biological pest control.
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Aguihe PC, Kehinde AS, Halidu SK, Joshua DA, Samuel KU, Komolafe PL, Ilaboya II. Performance and egg qualities of laying japanese quails fed yam peel meal based diets with enzymes complex+yeast supplementation. ACTA SCIENTIARUM: ANIMAL SCIENCES 2021. [DOI: 10.4025/actascianimsci.v44i1.53335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A 10-week experiment was conducted to evaluate the combined effect of enzyme complex + yeast (Maxigrain®, MXG®) supplementation of sun-dried yam peel meal (YPM) based diet of laying Japanese quails (Coturnix coturnix japonica) on performance and egg quality. A total of 240, seven-weeks old quails were distributed in a completely randomize design with four dietary treatments and five replicates of 12 quails each. Diet 1 served as the control diet without YPM while diet 2, 3, and 4 contained 25, 50, and 75% YPM with MXG® supplementation (1g per kg), respectively. MXG® supplementation in YPM diets improved (p < 0.05) egg mass and feed conversion per egg. Increasing levels of YPM with MXG® supplementation did not show any effect (p > 0.05) on internal and external egg quality attributes except for eggshell weight and thickness which was higher (p < 0.05) in quails fed 75% YPM diet. It was concluded, therefore, that the utilization of YPM as an alternative dietary ingredient with MXG® supplementation can be tolerated in the diets of laying Japanese quails up to 75% inclusion level without any negative effect on productive and egg quality performance.
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Awasthi MK, Ferreira JA, Sirohi R, Sarsaiya S, Khoshnevisan B, Baladi S, Sindhu R, Binod P, Pandey A, Juneja A, Kumar D, Zhang Z, Taherzadeh MJ. A critical review on the development stage of biorefinery systems towards the management of apple processing-derived waste. RENEWABLE AND SUSTAINABLE ENERGY REVIEWS 2021; 143:110972. [DOI: 10.1016/j.rser.2021.110972] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/20/2023]
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A novel metagenome-derived thermostable and poultry feed compatible α-amylase with enhanced biodegradation properties. Int J Biol Macromol 2020; 164:2124-2133. [DOI: 10.1016/j.ijbiomac.2020.08.064] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 08/06/2020] [Accepted: 08/07/2020] [Indexed: 12/28/2022]
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Suresh G, Pakdel H, Rouissi T, Brar SK, Diarra M, Roy C. Evaluation of pyroligneous acid as a therapeutic agent against Salmonella in a simulated gastrointestinal tract of poultry. Braz J Microbiol 2020; 51:1309-1316. [PMID: 32468399 PMCID: PMC7455633 DOI: 10.1007/s42770-020-00294-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 05/05/2020] [Indexed: 10/24/2022] Open
Abstract
Pyroligneous acid (PA) was evaluated as a potential alternative to therapeutic antibiotics in poultry. Antimicrobial activity of PA was studied at acidic pH (2.0) and neutral pH (7.0) of the liquid against Salmonella enterica and Lactobacillus acidophilus. Acidic PA gave a MIC value of 0.8% (v/v) and 1.6% (v/v), and neutralized PA gave a MIC value of 1.6% (v/v) and 3.2% (v/v) against S. enterica and L. acidophilus respectively. Acidic PA was evaluated at different concentrations in a simulated poultry digestive tract and cecal fermentation to study its effect on the cecal microflora and fermentation profile. PA at a concentration of 1.6% (v/v) completely inhibited S. enterica and was also found to have a similar effect on lactobacilli count as compared with the control (p = 0.17). Additionally, PA at this concentration was found not to have a significant effect on acetic acid production after 24 h of cecal fermentation (p = 0.20). Graphical abstract.
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Affiliation(s)
- Gayatri Suresh
- Centre - Eau Terre Environnement, 490, Rue de la Couronne, Québec, QC, G1K 9A9, Canada
| | - Hooshang Pakdel
- Pyrovac Inc, 176-2 rue Damase-Breton, Saint-Lambert-de-Lauzon, QC, G0S 2W0, Canada
| | - Tarek Rouissi
- Centre - Eau Terre Environnement, 490, Rue de la Couronne, Québec, QC, G1K 9A9, Canada
| | - Satinder Kaur Brar
- Centre - Eau Terre Environnement, 490, Rue de la Couronne, Québec, QC, G1K 9A9, Canada.
- Department of Civil Engineering, Lassonde School of Engineering, York University, North York, Toronto, Ontario, M3J 1P3, Canada.
| | - Moussa Diarra
- Guelph Research and Development Centre, Science and Technology Branch, Agriculture and Agri-Food Canada, Guelph, Ontario, Canada
| | - Christian Roy
- Pyrovac Inc, 176-2 rue Damase-Breton, Saint-Lambert-de-Lauzon, QC, G0S 2W0, Canada
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Bartkiene E, Ruzauskas M, Bartkevics V, Pugajeva I, Zavistanaviciute P, Starkute V, Zokaityte E, Lele V, Dauksiene A, Grashorn M, Hoelzle LE, Mendybayeva A, Ryshyanova R, Gruzauskas R. Study of the antibiotic residues in poultry meat in some of the EU countries and selection of the best compositions of lactic acid bacteria and essential oils against Salmonella enterica. Poult Sci 2020; 99:4065-4076. [PMID: 32731994 PMCID: PMC7597929 DOI: 10.1016/j.psj.2020.05.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 04/27/2020] [Accepted: 05/01/2020] [Indexed: 11/18/2022] Open
Abstract
In this study, the presence of antibiotics (ANB) residues was evaluated in poultry meat purchased from German and Lithuanian markets. In addition, the antimicrobial activity of 13 lactic acid bacteria (LAB) strains, 2 essential oils (EO) (Thymus vulgaris and Origanum vulgare L.), and their compositions were tested for the purpose of inhibiting antibiotic-resistant Salmonella spp. ANB residues were found in 3 out of the 20 analyzed poultry meat samples: sample no. 8 contained enrofloxacin (0.46 μg/kg), sample no. 14 contained both enrofloxacin and doxycycline (0.05 and 16.8 μg/kg, respectively), and sample no. 18 contained enrofloxacin (2.06 μg/kg). The maximum residue limits (MRLs) for the sum of enrofloxacin and ciprofloxacin and for doxycycline in the poultry muscle are 100 μg/kg. Finally, none of the tested poultry meat samples exceeded the suggested MRLs; however, the issue of ANB residues still requires monitoring of the poultry industry in Germany, Poland, and Lithuania, despite the currently established low ANB concentrations. These findings can be explained by the increased use of alternatives to ANB in the poultry industry. Our results showed that an effective alternative to ANB, which can help to reduce the occurrence of antibiotic-resistant salmonella, is a composition containing 1.0% of thyme EO and the following LAB strains: Lactobacillus plantrum LUHS122, Enteroccocus pseudoavium LUHS242, Lactobacillus casei LUHS210, Lactobacillus paracasei LUHS244, Lactobacillus plantarum LUHS135, Lactobacillus coryniformins LUHS71, and Lactobacillus uvarum LUHS245, which can be recommended for poultry industry as components of feed or for the treatment of surfaces, to control the contamination with Salmonella strains. However, it should be mentioned that most of the tested LAB strains were inhibited by thyme EO at the concentrations of 0.5 and 1.0%, except for LUHS122, LUHS210, and LUHS245. Finally, it can be noted that the agents responsible for the inhibitory effect on Salmonella are not the viable LAB strains but rather their metabolites, and further studies are needed to identify which metabolites are the most important.
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Affiliation(s)
- Elena Bartkiene
- Institute of Animal Rearing Technologies, Lithuanian University of Health Sciences, 47181, Kaunas, Lithuania; Department of Food Safety and Quality, Lithuanian University of Health Sciences, 47181, Kaunas, Lithuania.
| | - Modestas Ruzauskas
- Institute of Microbiology and Virology, Lithuanian University of Health Sciences, 47181, Kaunas, Lithuania; Department of Anatomy and Physiology, Lithuanian University of Health Sciences, 47181, Kaunas, Lithuania
| | - Vadims Bartkevics
- Institute of Food Safety, Animal Health and Environment BIOR, 1076 Riga, Latvia
| | - Iveta Pugajeva
- Institute of Food Safety, Animal Health and Environment BIOR, 1076 Riga, Latvia
| | - Paulina Zavistanaviciute
- Institute of Animal Rearing Technologies, Lithuanian University of Health Sciences, 47181, Kaunas, Lithuania; Department of Food Safety and Quality, Lithuanian University of Health Sciences, 47181, Kaunas, Lithuania
| | - Vytaute Starkute
- Institute of Animal Rearing Technologies, Lithuanian University of Health Sciences, 47181, Kaunas, Lithuania; Department of Food Safety and Quality, Lithuanian University of Health Sciences, 47181, Kaunas, Lithuania
| | - Egle Zokaityte
- Institute of Animal Rearing Technologies, Lithuanian University of Health Sciences, 47181, Kaunas, Lithuania; Department of Food Safety and Quality, Lithuanian University of Health Sciences, 47181, Kaunas, Lithuania
| | - Vita Lele
- Institute of Animal Rearing Technologies, Lithuanian University of Health Sciences, 47181, Kaunas, Lithuania; Department of Food Safety and Quality, Lithuanian University of Health Sciences, 47181, Kaunas, Lithuania
| | - Agila Dauksiene
- Institute of Animal Rearing Technologies, Lithuanian University of Health Sciences, 47181, Kaunas, Lithuania; Department of Anatomy and Physiology, Lithuanian University of Health Sciences, 47181, Kaunas, Lithuania
| | - Michael Grashorn
- Institute of Animal Science at University of Hohenheim, 70599 Stuttgart, Germany
| | - Ludwig E Hoelzle
- Institute of Animal Science at University of Hohenheim, 70599 Stuttgart, Germany
| | - Anara Mendybayeva
- Research Institute of Applied Biotechnology, Kostanay State University, 110000 Kostanay, Kazakhstan
| | - Raushan Ryshyanova
- Research Institute of Applied Biotechnology, Kostanay State University, 110000 Kostanay, Kazakhstan
| | - Romas Gruzauskas
- Department of Food Science and Technology, Kaunas University of Technology, 50254, Kaunas, Lithuania
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Attia YA, Al-Khalaifah H, Abd El-Hamid HS, Al-Harthi MA, El-Shafey AA. Effect of Different Levels of Multienzymes on Immune Response, Blood Hematology and Biochemistry, Antioxidants Status and Organs Histology of Broiler Chicks Fed Standard and Low-Density Diets. Front Vet Sci 2020; 6:510. [PMID: 32195272 PMCID: PMC7015166 DOI: 10.3389/fvets.2019.00510] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Accepted: 12/23/2019] [Indexed: 01/10/2023] Open
Abstract
This study was executed to investigate the effect of supplementing three multienzyme levels (0, 0. 1, and 0.2%) with two types of diet [standard diet (SD) vs. low-density diet (LDD)] on immune response, blood hematology and biochemistry, antioxidant status, and organ histology of broilers during 1–38 days of age. A total of 216 unsexed 1-day-old Arbor Acres broiler chicks were randomly distributed, on a factorial design (2 × 3), to six treatments each with six replicates. There were six chicks per replicate. Results showed that LDD significantly decreased body weight gain (BWG) of broilers, but did not affect the European Production Efficiency Index (EPEI). Addition of multienzymes at both levels (0.1 and 0.2%) significantly increased BWG and improved EPEI, compared to the control diet. Alanine aminotransferase (ALT), aspirate aminotransferase (AST), malondialdehyde (MDA), lymphocyte, lymphocyte transformation test (LTT), and phagocyte activity (PA) were significantly higher for LDD than the SD, but eosinophil was lower. Supplementation of multienzymes significantly decreased ALT, AST, and MDA, compared to the control group, but increased packed cell volume (PCV), hemoglobin (Hgb), lymphocytes, and monocytes. Immune organs, such as spleen, thymus, and the bursa of Fabricius were significantly increased with multienzyme supplementation. It could be concluded that multienzyme supplementation at either 0.1 or 0.2% to SD or LDD improved EPEI and immune status of broiler chicks.
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Affiliation(s)
- Y A Attia
- Arid Land Agriculture Department, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, Saudi Arabia.,Animal and Poultry Production Department, Faculty of Agriculture, Damanhur University, Damanhur, Egypt
| | - H Al-Khalaifah
- Environment and Life Sciences Research Center, Kuwait Institute for Scientific Research, Kuwait City, Kuwait
| | - H S Abd El-Hamid
- Poultry and Fish Diseases Department, Faculty of Veterinary Medicine, Damanhour University, Damanhur, Egypt
| | - M A Al-Harthi
- Arid Land Agriculture Department, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, Saudi Arabia
| | - A A El-Shafey
- Animal and Poultry Production Department, Faculty of Agriculture, Damanhur University, Damanhur, Egypt
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