16,530 results match your criteria chicken production

Identification of genes related to stress affecting thymus immune function in a chicken stress model using transcriptome analysis.

Res Vet Sci 2021 Jun 7;138:90-99. Epub 2021 Jun 7.

College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China; Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou 450046, China. Electronic address:

With the rapid development of the poultry breeding industry and highly intensive production management, the losses caused by stress responses are becoming increasingly serious. To screen candidate genes related to chicken stress and provide a basis for future research on the molecular mechanisms governing the effects of stress on chicken immune function, we successfully constructed a chicken stress model by exogenously introducing corticosterone (CORT). RNA-seq technology was used to identify and analyze the mRNA and enrichment pathways of the thymus in the stress model group and the control group. Read More

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Impact of Fermented or Enzymatically Fermented Dried Olive Pomace on Growth, Expression of Digestive Enzyme and Glucose Transporter Genes, Oxidative Stability of Frozen Meat, and Economic Efficiency of Broiler Chickens.

Front Vet Sci 2021 28;8:644325. Epub 2021 May 28.

Department of Nutrition and Clinical Nutrition, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt.

The use of dried olive pomace as complementary energy sources in poultry feed is still limited due to its low protein and high fiber contents. Bioconversion of olive pomace through solid-state fermentation with or without exogenous enzymes is considered as a trial for improving its nutritional value. This study aimed to evaluate the effects of fermented olive pomace with or without enzymatic treatment on the growth, modulations of genes encoding digestive enzymes and glucose transporters, meat oxidative stability, and economic efficiency of broiler chickens. Read More

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Growth performance, intestinal histomorphology, gut microflora and ghrelin gene expression analysis of broiler by supplementing natural growth promoters: A nutrigenomics approach.

Saudi J Biol Sci 2021 Jun 13;28(6):3438-3447. Epub 2021 Mar 13.

Department of Zoology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.

In an epoch of escalating number of antibiotic-resistance bacteria, there is a dire need to develop efficient and novel feeding strategies for animal nutrition as alternatives to antibiotics. Here, implicating nutrigenomic approach, phytobiotics and organic acids were used to evaluate ghrelin gene expression levels, gut microflora composition, performance parameters and intestinal histomorphological changes in broiler chickens. One-day-old chicks (n = 315) were reared for 42 days and distributed randomly into five experimental groups; each with three replicates (21 birds per replicate). Read More

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Associations between behaviour and health outcomes in conventional and slow-growing breeds of broiler chicken.

Animal 2021 Jun 10;15(7):100261. Epub 2021 Jun 10.

The Royal Veterinary College, Hawkshead Lane, Brookmans Park, Hatfield AL9 7TA, United Kingdom.

Broiler chickens are prone to a range of complex health and welfare issues. To support informed selection of welfare traits whilst minimising impact on production efficiency and to address a major gap in understanding, we systematically explored associations between health and behavioural indicators of broiler welfare. One conventional (CNV, n = 350) and two slow-growing broiler breeds (SGH and SGN, respectively n = 400) were reared from hatch in pens of 50 birds. Read More

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The changing microbiome of poultry meat; from farm to fridge.

Food Microbiol 2021 Oct 1;99:103823. Epub 2021 May 1.

UCD School of Agriculture Food Science and Veterinary Medicine, Belfield, Dublin 4, D04, V1W8, Ireland; UCD Institute of Food and Health, Belfield, Dublin 4, D04, V1W8, Ireland; UCD Centre for Food Safety, University College Dublin, Belfield, Dublin 4, D04, V1W8, Ireland.

Chickens play host to a diverse community of microorganisms which constitute the microflora of the live bird. Factors such as diet, genetics and immune system activity affect this complex population within the bird, while external influences including weather and exposure to other animals alter the development of the microbiome. Bacteria from these settings including Campylobacter and Salmonella play an important role in the quality and safety of end-products from these birds. Read More

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October 2021

The protective effect of Nano-selenium against cadmium-induced cerebellar injury via the heat shock protein pathway in chicken.

Food Chem Toxicol 2021 Jun 9:112332. Epub 2021 Jun 9.

College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, P.R. China; Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin 150030, P.R. China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin 150030, P.R. China. Electronic address:

Cadmium (Cd) is one of the toxic environmental heavy metals that poses health hazard to animal due to its toxicity. Nano-Selenium (Nano-Se) is a Nano-composite form of Se, which has emerged as promising therapeutic agent for its protective roles against heavy metals-induced toxicity. Heat shock proteins (HSPs) play a critical role in cellular homeostasis. Read More

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Use of available crop by-products as alternative bedding materials to wheat straw for rearing broilers.

Animal 2021 Jun 8;15(7):100260. Epub 2021 Jun 8.

Poultry Production Department, Agriculture College, Damietta University, Damietta 34517, Egypt.

The provision of suitable bedding for rearing broilers is an ongoing challenge for poultry producers. The aim of the present study was to evaluate the effect of using different types of crop residues as alternative bedding materials to wheat straw on growth performance, carcass traits, health, and welfare of broilers; moreover, the effects on the bedding and air quality were analyzed. We randomly assigned 180 1-day-old chickens (Cobb 500) across six bedding groups (three replicates of 10 birds each). Read More

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Predicting the effect of salt on heat tolerance of Listeria monocytogenes in meat and fish products.

Int J Food Microbiol 2021 Aug 1;352:109265. Epub 2021 Jun 1.

The National Food Institute, Technical University of Denmark, Division for Microbiology and Production, Kemitorvet, Building 202, DK-2800 Kgs. Lyngby, Denmark.

Listeria monocytogenes is a potentially fatal foodborne pathogen that can be found in various ready-to-eat (RTE) products. It tolerates adverse conditions such as high salt concentrations and refrigerated storage, thus, the elimination of the pathogen in food processing often relies on heat processing. The objective of this study was to create a model to predict the effect of salt on heat tolerance of L. Read More

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The environmental and economic trade-offs of using composted or stockpiled manure as partial substitute of synthetic fertilizer.

J Environ Qual 2021 Jun 11. Epub 2021 Jun 11.

Centre for Agriculture and the Bioeconomy, Queensland University of Technology, 2 George St, Brisbane, QLD, 4000, Australia.

Manure generated from livestock production could represent an important source of plant nutrients in substitution of synthetic fertilizer. To evaluate the sustainability of partially substituting synthetic fertilizer with soil organic amendments (OA) in horticulture, an economic and greenhouse gas (GHG) budget was developed. The boundary for analysis included manure processing (stockpiling versus composting), transport and spreading of manure and compost (feedlot and chicken) in intensively cultivated horticultural fields. Read More

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Antigenic and Molecular Characterization of Virulent Newcastle Disease Viruses Circulating in Ethiopia Between 1976 and 2008.

Vet Med (Auckl) 2021 4;12:129-140. Epub 2021 Jun 4.

Institute of Infectology, Friedrich-Loeffler-Institut, Greifswald, Germany.

Introduction: Newcastle disease virus (NDV) cultures held in the isolate collections in Ethiopia between 1976 and 2008 were not characterized using biological and molecular techniques. The already characterized NDV isolates belonged to genotype VI but the genetic nature of previously collected isolates, which could shade light on the history of introduction into the country and their evolutionary relationships, were not established.

Methods: A total of 14 NDVs (11 obtained from outbreak cases in chickens and three commercial vaccinal strains used in the country) were inoculated into specific pathogen free (SPF) embryonated chicken eggs (ECE). Read More

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Development of new strategy combining heat treatment and phage cocktail for post-contamination prevention.

Food Res Int 2021 Jul 18;145:110415. Epub 2021 May 18.

Department of Food and Animal Biotechnology, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; Department of Agricultural Biotechnology, College of Agriculture and Life Science, Seoul National University, Seoul 08826, Republic of Korea; Center for Food Bioconvergence, Seoul National University, Seoul 08826, Republic of Korea. Electronic address:

Heat treatment is an effective method for ensuring food safety and quality by controlling microbial contamination. However, food poisoning outbreaks have continuously occurred in heat-treated products due to improper thermal treatment and/or post-contamination of foodborne pathogens. This study proposes a novel strategy combining thermostable bacteriophages with thermal processing of food production plants to control foodborne pathogens and even bacterial contamination. Read More

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Adjuvant effects of bacterium-like particles in the intranasal vaccination of chickens against Newcastle disease.

Vet Microbiol 2021 Jun 4;259:109144. Epub 2021 Jun 4.

College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China. Electronic address:

Given that the respiratory mucosa is an important site for the initial replication of Newcastle disease virus (NDV), developing intranasal vaccines for chickens is an effective strategy to protect against this disease. The low immunogenicity of inactivated NDV administered by the mucosal route motivated us to identify a safe and potent adjuvant. Previous studies have shown that bacterium-like particles (BLPs), which serve as mucosal adjuvants, induce effective local and systemic immune responses through TLR2 signaling in both mammals and humans. Read More

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Assay considerations for fluorescein isothiocyanate-dextran (FITC-d): an indicator of intestinal permeability in broiler chickens.

Poult Sci 2021 Apr 20;100(7):101202. Epub 2021 Apr 20.

Department of Poultry Science, University of Georgia, Athens, GA 30602, USA. Electronic address:

Fluorescein isothiocyanate-dextran (FITC-d) is being used as an indicator of intestinal paracellular permeability in poultry research. Especially with the industry moving toward antibiotic-free production, intestinal function and integrity issues have been a research focus. An increasing number of scientific conference abstracts and peer-reviewed journal publications have shown that 4-kDa FITC-d is an efficient marker candidate for measurement of intestinal permeability and can be applied in broiler research. Read More

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Effect on physiological and production parameters upon supplementation of fermented yeast culture to Nicobari chickens during and post summer.

J Anim Physiol Anim Nutr (Berl) 2021 Jun 10. Epub 2021 Jun 10.

ICAR-Directorate of Poultry Research, Rajendranagar, India.

Nicobari is an indigenous bird reared for meat and eggs. This study evaluated the effect of heat stress on plasma levels of leptin, growth hormone and their receptors, liver AMP kinase, plasma cholesterol and lipid peroxide (MDA). The laying period coincided with the post summer period. Read More

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Optimization of hydrothermal synthesis of hydroxyapatite from chicken eggshell waste for effective adsorption of aqueous Pb(II).

Environ Sci Pollut Res Int 2021 Jun 9. Epub 2021 Jun 9.

State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, People's R epublic of, Chengdu, 610059, China.

Proper disposal of the millions of tons of eggshell waste generated around the world every year is a significant environmental challenge. However, eggshell waste can be converted into new materials that may be useful for a wide range of applications. In this study, four methods, including the conventional subcritical hydrothermal method (CSHM), microwave-assisted subcritical hydrothermal method (MSHM), conventional low-temperature hydrothermal method (CLHM), and ultrasonic-assisted low-temperature hydrothermal method (ULHM) were used to convert eggshell waste into hydroxyapatite (HAP). Read More

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Effects of season, genotype and rearing system on some meat quality traits for broilers raised in semi-intensive systems.

Trop Anim Health Prod 2021 Jun 9;53(3):352. Epub 2021 Jun 9.

Research and Development Project Branch Office, Antalya Metropolitan Municipality, Antalya, Turkey.

We compared fast-growing and slow-growing broilers raised in extensive indoor, free-range, and traditional free-range systems in terms of meat quality in spring and summer. Five different semi-intensive broiler production applications (fast- in extensive indoor, slow- in extensive indoor, fast- in free-range, slow- in free-range and slow- in traditional free-range) were used according to EU standards. Extensive indoor and free-range birds were slaughtered at 57 days of age and traditional free-range chickens at 82 days. Read More

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The role of chicken management practices in children's exposure to environmental contamination: a mixed-methods analysis.

BMC Public Health 2021 06 8;21(1):1097. Epub 2021 Jun 8.

Department of Nutrition, Harvard T. H. Chan School of Public Health, 665 Huntington Avenue, Boston, MA, 02115, USA.

Background: Household chicken production presents an opportunity to promote child nutrition, but the benefits might be offset by increased environmental contamination. Using household surveys, direct observations, and in-depth interviews with woman caregivers, we sought to describe the relationship between chicken management practices and household exposure to environmental contamination, and assess barriers to adopting improved husbandry practices.

Methods: First, we analyzed baseline data from 973 households raising chickens in the two interventions arms from the Agriculture-to-Nutrition (ATONU) study in Ethiopia to assess the relationship between animal management practices and environmental exposures. Read More

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Comparative analysis of hypothalamus transcriptome between laying hens with different egg-laying rates.

Poult Sci 2021 Mar 11;100(7):101110. Epub 2021 Mar 11.

College of Animal Science, Henan Agricultural University, Zhengzhou 450046, China; Henan Innovative Engineering Research Center of Poultry Germplasm Resource, Henan Agricultural University, Zhengzhou 450046, China; International Joint Research Laboratory for Poultry Breeding of Henan, Henan Agricultural University, Zhengzhou 450046, China. Electronic address:

Egg-laying performance is one of the most important economic traits in the poultry industry. Commercial layers can lay one egg almost every day during their peak-laying period. However, many Chinese indigenous chicken breeds show a relatively low egg-laying rate, even during their peak-laying period. Read More

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Effects of dietary supplementation with a laminarin-rich extract on the growth performance and gastrointestinal health in broilers.

Poult Sci 2021 Apr 20;100(7):101179. Epub 2021 Apr 20.

School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland. Electronic address:

Restriction in antimicrobial use in broiler chicken production is driving the exploration of alternative feed additives that will support growth through the promotion of gastrointestinal health and development. The objective of this study was to determine the effects of dietary inclusion of laminarin on growth performance, the expression of nutrient transporters, markers of inflammation and intestinal integrity in the small intestine and composition of the caecal microbiota in broiler chickens. Two-hundred-and-forty day-old male Ross 308 broiler chicks (40. Read More

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Effects of Dietary Maltol on Innate Immunity, Gut Health, and Growth Performance of Broiler Chickens Challenged With .

Front Vet Sci 2021 20;8:667425. Epub 2021 May 20.

Animal Bioscience and Biotechnology Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD, United States.

Two studies were conducted to evaluate the effects of maltol as a postbiotic on innate immunity, gut health, and enteric infection. In the first study, an culture system was used to evaluate the effects of maltol on the innate immune response of chicken macrophage cells (CMC), gut integrity of chicken intestinal epithelial cells (IEC), anti-parasitic activity against , and differentiation of quail muscle cells (QMC) and primary chicken embryonic muscle cells (PMC). All cells seeded in the 24-well plates were treated with maltol at concentrations of 0. Read More

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Rutin Ameliorates Cadmium-Induced Necroptosis in the Chicken Liver via Inhibiting Oxidative Stress and MAPK/NF-κB Pathway.

Biol Trace Elem Res 2021 Jun 6. Epub 2021 Jun 6.

Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive Veterinary, College of Veterinary, Northeast Agricultural University, No. 600 Changjiang Street, Harbin, 150030, China.

Cadmium (Cd) is a recognized toxic metal and exerts serious hepatotoxicity in animals and humans. Rutin (RUT) is a dietary bioflavonoid with strong antioxidant and anti-inflammatory potential. However, little is known about the alleviating effect of RUT against Cd-induced liver necroptosis. Read More

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Understanding the effects of intramuscular injection and feed withdrawal on Salmonella Typhimurium shedding and gut microbiota in pullets.

J Anim Sci Biotechnol 2021 Jun 4;12(1):78. Epub 2021 Jun 4.

School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, South Australia, 5371, Australia.

Background: Gut microbiota plays a key role in health, immunity, digestion, and production in layers. Factors such as environment, diet, diseases, stress, and flock management significantly affect gut microbiota; however, it is not known how potential stressors such as intramuscular injections or feed withdrawal alter the composition of gut microbiota that result in increased the shedding level of foodborne pathogens. In the current study, the effects of intramuscular corticosterone injection and feed withdrawal were evaluated to understand their role in Salmonella Typhimurium shedding and changes in the composition of gut microbiota in layers. Read More

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Effect of lemongrass essential oil against multidrug-resistant Salmonella Heidelberg and its attachment to chicken skin and meat.

Poult Sci 2021 Mar 12;100(7):101116. Epub 2021 Mar 12.

Department of Animal Science, University of Minnesota, Saint Paul, MN 55108. Electronic address:

Salmonella Heidelberg (S. Heidelberg) is a major pathogen implicated in foodborne outbreaks for which poultry products can serve as an epidemiological source. This study determined the efficacy of GRAS-status lemongrass essential oil (LGEO) against S. Read More

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Research Note: Detection of Avian metapneumovirus subgroup C specific antibodies in a mallard flock in Italy.

Poult Sci 2021 Apr 20;100(7):101186. Epub 2021 Apr 20.

VIPAC Unit, Anses (French Agency for Food, Environmental and Occupational Health Safety), Ploufragan-Plouzané-Niort Laboratory, B.P.53, Ploufragan 22440, France.

Avian metapneumovirus (aMPV) is a viral pathogen that causes respiratory signs and drops in egg production most notably in turkeys but also affects chickens, ducks and other species. Four subgroups (aMPV-A, -B, -C and -D) have been characterized to date, which differ genetically, antigenically and in terms of geographic distribution and host range. Despite the rising awareness towards aMPV, many aspects of its epidemiology are still poorly understood. Read More

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Transcriptome analysis of primary chicken cells infected with infectious bronchitis virus strain K047-12 isolated in Korea.

Arch Virol 2021 Jun 5. Epub 2021 Jun 5.

College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon, Gangwon-do, Republic of Korea.

Infectious bronchitis virus (IBV), an avian coronavirus, is highly contagious. Chickens with IBV infection develop acute pathogenesis in multiple organs, including the respiratory and urogenital tracts. Frequent recombination in the spike (S) glycoprotein gene has made vaccine strategies ineffective. Read More

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Antibiotic usage and resistance in animal production in Vietnam: a review of existing literature.

Trop Anim Health Prod 2021 Jun 5;53(3):340. Epub 2021 Jun 5.

Faculty of Applied Science and Health, Dong Nai Technology University, Nguyen Khuyen Street, Trang Dai Ward, Bien Hoa City, Dong Nai, 810000, Vietnam.

Inappropriate use of antibiotics in animal production system is one of the major factors leading to the antibiotic resistance (ABR) development. In Vietnam, the ABR situation is crucial as antibiotics have been used indiscriminately for disease prevention and as growth promoters in animals. Thus, a thorough understanding on the ABR in veterinary settings would be beneficial to the Vietnam public health authority in formulating timely interventions. Read More

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Probiotics Improves Intestinal Health of Subclinical Necrotic Enteritis-Challenged Broilers.

Front Microbiol 2021 18;12:623739. Epub 2021 May 18.

State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China.

Necrotic enteritis infection poses a serious threat to poultry production, and there is an urgent need for searching effective antibiotic alternatives to control it with the global ban on in-feed antibiotics. This study was conducted to investigate the effects of dietary replacing enramycin on the growth performance and intestinal health of subclinical necrotic enteritis (SNE)-challenged broilers. In total, 504 1-day-old Arbor Acres male chickens were selected and subsequently assigned into three treatments, including PC (basal diet + SNE challenge), PA (basal diet extra 10 mg/kg enramycin + SNE challenge), and PG (basal diet extra 3. Read More

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Epidemiological surveillance of H9N2 avian influenza virus infection among chickens in farms and backyards in Egypt 2015-2016.

Vet World 2021 Apr 20;14(4):949-955. Epub 2021 Apr 20.

Animal Hygiene and Zoonoses, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, 41522, Egypt.

Background And Aim: LPAI H9N2 infection among the poultry population in Egypt constitutes an additional risk factor in the poultry industry. This study aimed to determine the prevalence of H9N2 avian influenza virus (AIV) in commercial and backyard chickens in Egypt. A 2-year survey of H9N2 AIV in chickens in farms and backyards was carried out in 2015 and 2016. Read More

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Novel duck reovirus exhibits pathogenicity to specific pathogen-free chickens by the subcutaneous route.

Sci Rep 2021 Jun 3;11(1):11769. Epub 2021 Jun 3.

Institute of Poultry Science, Shandong Academy of Agricultural Sciences, No. 1 Jiaoxiao Road, Jinan City, 250023, Shan Dong Province, China.

To study the pathogenicity of new duck reovirus (NDRV) to chickens, eighty 3-day-old SPF chickens were equally divided into two groups. The experimental group was inoculated with a NDRV challenge strain of 100 μL (10 ELD/0.1 mL) by the subcutaneous (s. Read More

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Immunostimulatory Potential of Fruits and Their Extracts in Poultry.

Front Immunol 2021 17;12:641696. Epub 2021 May 17.

Guelph Research and Development Center, Agriculture and Agri-Food Canada, Guelph, ON, Canada.

The impact of antibiotic use for growth promotion in livestock and poultry production on the rise of antimicrobial resistance (AMR) in bacteria led to the ban of this practice in the European Union in 2006 and a restriction of antimicrobial use (AMU) in animal agriculture in Canada and the United States of America. There is a high risk of infectious diseases such as necrotic enteritis due to , and colibacillosis due to avian pathogenic in antimicrobial-free broiler chickens. Thus, efficient and cost-effective methods for reducing AMU, maintaining good poultry health and reducing public health risks (food safety) are urgently needed for poultry production. Read More

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