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Effects of dietary Lactobacillus rhamnosus GG supplementation on the production performance, egg quality, eggshell ultrastructure, and lipid metabolism of late-phase laying hens
BackgroundToward the late phase of laying, the production performance of laying hens decreases, egg quality deteriorates, lipid metabolism weakens,...
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Use of lactulose as a prebiotic in laying hens: its effect on growth, egg production, egg quality, blood biochemistry, digestive enzymes, gene expression and intestinal morphology
BackgroundThe rising popularity of eggs as an alternative source of protein to meat has led to significant increase in egg consumption over the past...
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Evaluation of the effect of short-chain organic acids and probiotics on production performance, egg white quality, and fecal microbiota of laying hens
This study investigated the effect of concomitant use of short-chain organic acids (acetic acid, butyric acid, and propionic acid) and probiotics...
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Effect of organic and inorganic dietary selenium supplementation on gene expression in oviduct tissues and Selenoproteins gene expression in Lohman Brown-classic laying hens
BackgroundThe oviduct of a hen provides a conducive environment for egg formation, which needs a large amount of mineral elements from the blood via...
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Isolation and characterization of multidrug resistant Gallibacterium anatis biovar haemolytica strains from Polish geese and hens
Gallibacterium anatis biovar haemolytica is a bacterium that is frequently associated with infections of the reproductive tract and respiratory...
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Quantification of IgY to Erysipelothrix rhusiopathiae in serum from Swedish laying hens
BackgroundErysipelas, caused by Erysipelothrix rhusiopathiae (ER), is an important emerging disease in free-range and organic egg-production. The...
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Route of infectious bronchitis virus vaccination determines the type and magnitude of immune responses in table egg laying hens
Chicken immune responses to infectious bronchitis virus (IBV) vaccination can depend on route of administration, vaccine strain and bird age....
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The stimulation and inhibition of beta-2 adrenergic receptor on the inflammatory responses of ovary and immune system in the aged laying hens
BackgroundOvarian chronic inflammation has been known to incidence in the laying hen mainly via increasing laying frequency and microbial infection,...
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Interaction of Salmonella Gallinarum and Salmonella Enteritidis with peripheral leucocytes of hens with different laying performance
Salmonella enterica ssp. enterica serovars Enteritidis (SE) and Gallinarum (SG) cause different diseases in chickens. However, both are able to reach...
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Immunological, biochemical and pathological effects of vitamin C and Arabic gum co-administration on H9N2 avian influenza virus vaccinated and challenged laying Japanese quails
AimThis study evaluated the effect of co-administration of vitamin C and Arabic gum (AG) supplements on the response of vaccinated (VAC) and...
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Whole genome sequence comparison of avian pathogenic Escherichia coli from acute and chronic sal**itis of egg laying hens
BackgroundInfection in the oviduct (sal**itis) is the most common bacterial infection in egg laying hens and is mainly caused by Escherichia coli ....
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The effectiveness of Bio-plus2B®, Techno Mos® and their mixture on the rate of egg production, egg characteristics, retention of nutrients and blood metabolites through the early period of production
BackgroundThe trend of using probiotic, prebiotic and their mixture as alternative feed additives which works as growth promoters in poultry diets to...
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Evaluation of the reproductive system development and egg-laying performance of hens infected with TW I-type infectious bronchitis virus
The prevalence of TW I-type infectious bronchitis virus (IBV) has been increasing rapidly, and it has become the second most common genotype of IBV...
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A cross-sectional study on feather cover damage in Canadian laying hens in non-cage housing systems
BackgroundFeather damage (FD) resulting from feather pecking remains a concern in non-cage housing systems for laying hens worldwide. This study...
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Gut microbiota profiles of commercial laying hens infected with tumorigenic viruses
BackgroundStudies have shown that some viral infections cause structural changes in the intestinal microflora, but little is known about the effects...
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GtxA is a virulence factor that promotes a Th2-like response during Gallibacterium anatis infection in laying hens
GtxA, a leukotoxic RTX-toxin, has been proposed a main virulence factor of Gallibacterium anatis . To evaluate the impact of GtxA during infection, we...
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Effect of Bacillus velezensis to substitute in-feed antibiotics on the production, blood biochemistry and egg quality indices of laying hens
BackgroundThe excessive use of antibiotics in the livestock feed industry caused inevitable side effects of microbial resistance. Besides this...
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Occurrence of extended-spectrum beta-lactamase-producing Enterobacteriaceae, microbial loads, and endotoxin levels in dust from laying hen houses in Egypt
BackgroundPoultry houses are often highly contaminated with dust, which might contain considerable amounts of microorganisms and endotoxins. The...
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Causes of carcass condemnation in Norwegian aviary housed layers
BackgroundMeat inspection data is commonly used to monitor health and welfare in commercial broiler production; however, less used in layers....
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A multiepitope vaccine encoding four Eimeria epitopes with PLGA nanospheres: a novel vaccine candidate against coccidiosis in laying chickens
With a worldwide distribution, Eimeria spp. could result in serious economic losses to the poultry industry. Due to drug resistance and residues,...
