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BACKGROUND: The chicken body louse is an obligate ectoparasite of domestic chickens. Chicken body lice feed on feathers, and infestation with this louse is linked to decreases in egg production, hen weight, and feed conversion efficiency. However, it is unknown how chicken body lice impact egg-laying chickens in cage-free environments. Welfare and behavior metrics were collected from flocks of egg-laying chickens either infested with chicken body lice or left uninfested. METHODS: In two trials, two flocks of cage-free commercial egg-laying chickens were infested with chicken body lice or maintained as uninfested controls. At three timepoints, behavior and welfare of all chickens was measured. On-animal sensors were used to quantify pecking, preening, and dustbathing behavior. Other animal-based welfare metrics included recording comb wounds and skin lesions. RESULTS: Birds infested with chicken body lice exhibited significantly more preening behaviors than uninfested birds, even at low louse levels. Moderate or severe skin lesions were detected on birds that were moderately infested with chicken body lice while skin lesions were never detected on uninfested birds. CONCLUSIONS: The welfare of chickens was impacted by the chicken body louse, a chewing louse that primarily feather feeds. Evidence of skin lesions on infested birds suggests that lice may cause more damage to birds than previously thought, and further evaluation of louse economic damage is necessary.

In Africa, livestock production plays a crucial role for sustainable food security and economic growth. However, the development of this sector has been delayed by livestock diseases, one of the main constraints, which can cause important production and economic losses. To overcome these constraints, farmers extensively use antimicrobials, which in turn can lead to antimicrobial resistance (AMR), one of the main threats to global health and food security. Biosecurity has been identified as a key strategy to reduce livestock diseases. Therefore, the current systematic review and meta‐analysis, conducted according to the Cochrane guideline, aimed at determining the efficacy of biosecurity in preventing and controlling infectious diseases in livestock farms in Africa. Of the 1408 records retrieved from five different databases, only 16 met the inclusion criteria. These studies were conducted in Egypt (31.2%), Nigeria (31.2%), Uganda (18.8%), Ethiopia (12.5%) and Tunisia (6.3%) and concerned poultry (62.4%), pigs (18.8%) and cattle (18.8%). Investigations focused mainly on avian influenza (AI) (15.0%) and coccidiosis (10.0%) in poultry and African swine fever (ASF) (10.0%) in pigs. In poultry farms, the results of the pairwise meta‐analysis showed that biosecurity measures related to visitors and farmworkers could be effective at reducing the risk of introduction and spread of AI viruses (odds ratio [OR] = 0.48; 95% confidence interval [CI] 0.28–0.82). Moreover, inadequate biosecurity seemed to be a factor promoting coccidiosis (OR = 4.20; 95% CI 2.4–7.4) and AI (OR = 1.74; 95% CI 1.23–2.48). Prevention of ASF was significantly associated with the application of biosecurity measures related to animals' transport, removal of carcasses and manure (OR = 0.33; 95% CI 0.12–0.88). Despite their importance, these findings cannot be translated to the entire African continent, since no studies were available for more than 90% of its countries. More research should be carried out to fill in the gaps identified by this review. [ABSTRACT FROM AUTHOR]

By 2050, the need for poultry products is predicted to quadruple globally, mostly as a result of rising living standards. In the meantime, the quality of feed crops and forage, availability of water, poultry diseases, and poultry reproduction are all threatened by climate change, which poses a challenge to poultry production. This analysis assesses the effects of climate change on poultry production globally, the role that poultry production plays in climate change, and the particular tactics used by the poultry industry to adapt to and mitigate the effects of climate change. Climate variability will limit poultry production because it will raise the amount of water that chickens consume by a factor of three, increase the demand for agricultural lands due to the significant rise in production, and raise concerns about food security. After all, approximately one-third of the world's cereal harvest is used to feed animals, including poultry. In the meantime, 8% of the livestock sector’s emissions of greenhouse gases (GHG) come from the poultry industry, which accelerates climate change. As a result, the poultry industry will play a significant role in reducing greenhouse gas emissions and enhancing global food security. Therefore, assessments of the application of adaptation and mitigation measures specific to the region and poultry production system in use, as well as policies that encourage and facilitate the implementation of these measures, are necessary for converting to sustainable poultry production. [ABSTRACT FROM AUTHOR]

Wooden breast (WB) is a myopathy that occurs in pectoralis major (PM) muscles, predominately affecting large, fast-growing broilers. Severe myodegeneration, increased hypoxia, reduced blood flow, and increased collagen deposition are hallmark characteristics of WB that culminate in unsatisfactory fresh meat quality attributes, such as poor water-holding capacity, tenderness, and processing characteristics. Therefore, WB meat is often downgraded resulting in economic losses for the United States poultry industry. Although WB has been well characterized, its etiology remains undefined. As the scientific community continues to resolve mechanisms responsible for WB onset, understanding biochemical changes associated with WB may facilitate solutions to negate its poor meat quality attributes. Given changes in metabolism of living muscle can alter biochemical processes during the conversion of muscle to meat, this review aims to summarize and discuss the current knowledge of WB muscle and meat biochemistry. For example, it appears metabolic pathways that support combating stress are upregulated in WB muscle at the expense of glycolytic flux, which presumably contributes to the high ultimate pH of WB meat. Further, perturbed function of WB mitochondria, such as altered calcium handling, impacts aspects of postmortem metabolism and proteolysis. Collectively, metabolic dysfunction of WB muscle alters the biochemical processes that occur during the conversion of muscle to meat, and thus contributes to the poor WB meat quality. [ABSTRACT FROM AUTHOR]

1. Monitoring behavioural dynamics in complex animal environments, such as poultry breeding facilities, poses a challenge. Utilising technological approaches, such as accelerometers, offers a solution to assess long-term changes in reproductive activity at an individual bird level. Specifically, these sensors measure acceleration associated with the position and movements of the body over time. However, it is important to assess the most suitable method for attaching accelerometer tags to ensure they do not negatively impact behaviour and yield high-quality data.2. The potential of tri-axial accelerometer tags for assessing reproductive behaviour in Japanese quail was evaluated. Two attachment methods – a backpack (plastic platform with elastic bands near wing bases) and a patch (accelerometer on fabric glued to the synsacrum region) – were compared. Controls were handled similarly but without tags. Eighteen pairs of females were housed in pens and assessed immediately and 24 h after handling. After a week of habituation, a male from the same treatment group was introduced into each pen on d 8. The reproductive behaviour of the males was recorded using accelerometers and video recordings.3. The results showed that birds with patches were able to remove their conspecific’s accelerometer and displayed an increased initial immobility response compared to the control and backpack groups. The presence of accelerometer tags did not impact male/female reproductive interactions nor fear responses to a novel object. From accelerometer recordings, male reproductive behaviour was easily identified as high amplitude fluctuations in the three axial components of the acceleration vectors, which was reflected as large values of dynamic body acceleration (VeDBA).4. In conclusion, the use of backpacks with accelerometers is a useful strategy to address highly relevant and difficult to tackle behavioural topics such as the temporal dynamic of male reproductive behaviour within breeding groups. [ABSTRACT FROM AUTHOR]

Conventional oral vaccine delivery in poultry is challenging due to vaccine degradation in the gastrointestinal (GI) environment and the need for cold-chain storage. Microencapsulation offers a solution by protecting vaccines from GI degradation and improving stability. Natural polymers like alginate and cashew gum have mucoadhesive properties, making them promising candidates for oral vaccine delivery. This study developed cashew-alginate microbeads and a powdered dose form for oral vaccine delivery in chickens. The microbeads were created using ionotropic gelation, while the powdered form was obtained via freeze-drying. These formulations were characterized for size, shape, and stability using scanning electron microscopy (SEM), light microscopy, X-ray diffraction (XRD), and Energy Dispersive X-ray (EDX). Peak adhesion time (PAT) was determined using chicken intestinal and esophageal tissues, and antigenicity was assessed with in-vitro hemagglutination (HA) and hemagglutination inhibition (HI) assays. The microbeads exhibited a spherical shape with a porous structure, suggesting enhanced antigen accommodation. Hemagglutination Inhibition tests indicated that the experimental vaccine remained effective without cold-chain storage for three months. These findings suggest that cashew-alginate microbeads are promising for oral vaccine delivery in poultry. [ABSTRACT FROM AUTHOR]

Colibacillosis caused by avian pathogenic Escherichia coli (APEC) is causing economic losses to the global poultry industry. Increased prevalence of antibiotic resistance in APEC is the leading cause for increased indiscriminate use of various antimicrobial compounds in farms. The study aimed to investigate the presence of phenotypic and genotypic markers for antibiotic resistance, metals, and biocides in APEC from Bangladeshi poultry and details about the antimicrobials used in poultry farms. In total, 55 APEC were isolated from hearts or liver samples of 86 sick or dead chickens using culture on agar plate and biochemical testing. APEC isolates were tested for antibiotic susceptibility to 14 antimicrobial agents according to the European Committee on Antimicrobial Susceptibility Testing. A series of PCRs was performed to screen the presence of genes for quinolones, colistin, aminoglycosides, ESBL, metals, and biocides. Detailed information regarding antibiotic use was collected from farmers during clinical investigations. Resistance was found to 10 antibiotics and prevalence was as follows: ampicillin (86%), ciprofloxacin (86%), trimethoprim-sulphamethoxazole (73%), chloramphenicol (33%), mecillinam (13%), gentamicin (11%), cefoxitin (11%), cefotaxime (9%), tigecycline (2%), and nitrofurantoin (2%). The most common multiresistance phenotype was CIP-AMP-SXT, and 35% of isolates were multidrug resistant. Genotypic analysis confirmed the presence of quinolone resistance genes [qnrS1 and aac-(6')-lb-cr], silver-resistant genes (silE), and mercury-resistant genes (merA) but not others. In total, 88% farmers were using different antimicrobial compounds, and, of them, 56% were using antimicrobials without prescriptions from veterinarians. Ciprofloxacin was most extensively used followed by oxytetracycline. Critically important antibiotics like ciprofloxacin, colistin, and gentamicin are extensively used in the farms. This study confirmed the presence of antibiotics, metals, and biocide-resistant APEC in poultry farms in Bangladesh. Increased resistance to quinolones is a serious ongoing problem. The indiscriminate use of antibiotics in poultry farms is alarming and should be stopped. [ABSTRACT FROM AUTHOR]

Assessing the feather condition of broilers is crucial for monitoring the animal welfare status and detecting the occurrence of feather pecking activities. Currently, the feather condition of individual broilers is manually scored by trained experts. To provide a more objective and efficient tool for feather condition scoring, a novel deep learning-based model, named Feather Condition Scoring Network (FCS-Net), was proposed based on RGB and thermal infrared images. The FCS-Net model combined the ResNet18 architecture with the proposed Dense Feature Fusion (DFF) module, which can effectively learn the feature mapping relationship between RGB and thermal infrared images. Before inputting the images into the network, an image registration process was conducted to align the RGB and thermal infrared images. The results showed that the FCS-Net model had a good performance for feather condition scoring, with the Accuracy of 97.02%, the Precision of 96.99%, the Recall of 97.04%, the F 1 of 97.01%, and the Inference speed of 15.34 fps. Compared to the ResNet18_RGB model, which only utilise RGB images, the FCS-Net model showed notable improvements in Accuracy by 4.02%, Precision by 3.90%, Recall by 4.08%, and F 1 by 4.01%. Moreover, it was observed that the FCS-Net model focused more on the back region of the broilers through heatmap visualization. Furthermore, the algorithm was compared with six typical image recognition algorithms including VGG16, ResNet18, SE-ResNet18, DenseNet121, Mobilenet_V2, and Shufflenet_V2_ x 1_0, as well as the state-of-the-art (SOTA) feather condition assessment methods. The results showed that the FCS-Net model achieved better performance than the six algorithms and the SOTA feather condition assessment methods. This study provided a valuable reference for automated monitoring of feather condition scoring of broilers in smart farming. • Proposing a Feather Condition Scoring Network (FCS-Net) for broilers. • Introducing Dense Feature Fusion module to integrate RGB and thermal images. • FCS-Net model surpassed both RGB or thermal image-based models. • FCS-Net provided a more accurate and efficient tool for farm automated monitoring. [ABSTRACT FROM AUTHOR]

Finding environmentally friendly, effective and residue‐free alternatives to antibiotics has become a research priority. This is due to the ban on antibiotics in animal feed. Curcumin is a polyphenol extracted from the rhizome of turmeric that has antioxidant, anti‐inflammatory and immunomodulatory properties. Curcumin has been widely demonstrated as a traditional flavoured agent and herbal medicine in the fight against diseases. In recent years, curcumin has been extensively studied in animal production, especially in poultry production. This article reviews the source, structure, metabolism and biological functions of curcumin and focuses on the application of curcumin in poultry production. In terms of production performance, curcumin can improve the growth performance of poultry, increase the egg production rate of laying hens and alleviate the negative effects of heat stress on the production performance of poultry and livestock. In terms of meat quality, curcumin can improve poultry meat quality by regulating lipid metabolism and antioxidant capacity. In terms of health, curcumin can improve immunity. Since mycotoxins have been a major problem in poultry production, this article also reviews the role of curcumin in helping poultry resist toxins. It is hoped that the review in this article can provide a concrete theoretical basis and research ideas for the research and application of curcumin in the field of poultry. [ABSTRACT FROM AUTHOR]

A total of 23 studies were identified in a literature search performed in the Scopus, Science Direct and Google Scholar databases for meta‐analysis. The criteria used include studies that were published from 2015 to 2023 and those reporting the effects of insect meal utilisation in poultry diets. Data on live weight (LW), carcass weight (CW), moisture, meat pH, lightness (L*), redness (a*), yellowness (b*), proximate composition (protein, fat and ash content) and shear force in broilers were subjected to OpenMEE software, and data were pooled using a random‐effect model. Subgroup analysis and meta‐regression were performed to ascertain the influence of dietary insect meals on the response of meat aspects and the source of heterogeneity, respectively, using the following moderators (insect species, dosage level, feeding duration and age at slaughter). The results indicated that dietary insect meal did not affect LW, CW, meat L*, pH, shear force, moisture, fat and ash content. In contrast, dietary insect meal increased the a* of the meat (standardised mean differences (SMDs) = 1.03; 95% confidence intervals (CIs) = 0.484–1.578; p ≤ 0.001), b* (SMD = 1.117; 95% CI = 0.334–1.90; p = 0.005), and meat protein content (SMD = 0.365; 95% CI = 0.031–0.7; p = 0.032). The subgroup analysis showed that insect meal dosage of ≤10% and age at slaughtered ≤35 days had improved the LW, CW and meat L*. In addition, the meat a*, protein and ash content were also influenced by insect species, dosage levels and age at slaughter. In conclusion, ≤10% of either Hermetia illucens or Tenebrio molitor can be included in broiler diets without compromising the LW, CW, meat pH, colour, shear force, moisture, fat and ash content in broilers. The study therefore indicated that insect meals have a bright future as an alternative protein source in poultry diets. [ABSTRACT FROM AUTHOR]

Sida rhombifolia (S. rhombifolia) is a widely used herbal plant for humans because of its antioxidant and antibacterial effects, but its potential use as a feed additive for livestock has not been investigated. Twenty 350 days‐old Anyi tile‐like grey chickens were randomly divided into a control group (fed basal diet) and a treatment group (fed basal diet + 3% of S. rhombifolia), and these chickens were feed for 31 days. Dietary S. rhombifolia remarkably enhanced plasma antioxidants, including the significantly increased total antioxidant capability (p < 0.01), catalase (p = 0.04), and superoxide dismutase (p < 0.01) in the treatment group. Furthermore, dietary S. rhombifolia also modulated chicken cecal microbiota, including an increased microbial diversity (Shannon, p = 0.03; Chao1, p = 0.03) in the treatment group. Regarding taxonomic analysis, 34 microbial taxa showed significant differences between the two groups. Meanwhile, the dominant phylum Actinobacteriota (p = 0.04), and dominant genera Desulfovibrio (p = 0.04) and Olsenella (p = 0.02) were significantly increased after treatment, whereas the pathogenic genus Escherichia‐Shigella (p = 0.04) was significantly decreased after feeding S. rhombifolia. The results indicating that S. rhombifolia has potential for use as a natural plant feed additive for chickens. [ABSTRACT FROM AUTHOR]

The article examines the current status of H5N1 avian influenza, emphasizing its low risk to humans despite widespread animal infections. Topics discussed include the virus's spread among wild and domestic animals, potential for mammalian transmission, and the importance of monitoring and managing risks to prevent human infection.

Objectives: Photoangiolytic lasers have yielded significant innovation in laryngeal surgery in the last 25 years. After the discontinuation of the potassium titanyl phosphate (KTP) laser, a novel 445-nm blue laser was developed. The optimal balance between a laser's desired tissue effects and collateral tissue damage is a major determinant of laser selection in microlaryngeal surgery. The shell-less incubation system for the chick chorioallantoic membrane (CAM) simulates the microvasculature of the human vocal fold and is useful for testing effects of laser settings and in simulated surgery. The aim of this study is to compare the tissue effects of the KTP and blue lasers using the shell-less CAM model. Methods: The shell-less incubation system contains: polymethylpentene film (used as a culture vessel), calcium lactate and distilled water supplementations. By using this system, the chick chorioallantoic membrane (CAM) can be fully exposed with a good field for surgery simulation. The effects of the 2 lasers (532 nm KTP and 445 nm blue) were quantified at clinically relevant energy settings and laser distances from target. Measures included imaging real-time vascular reactions in the CAM model, post-procedure histologic analysis of CAM tissue and temperature changes. Results: Vessel coagulation and rupture rates were less common with the blue laser compared with the KTP laser. Histologic analysis demonstrated less tissue disruption with the blue laser. Temperature changes were less with the blue laser. Conclusion: In this CAM model with specific conditions, the blue laser reveals less tissue damage than the KTP laser. Suitable working distance and power setting of the laser are necessary for desired tissue effects. Level of Evidence: Level 3. [ABSTRACT FROM AUTHOR]

Woody breast (WB) myopathy is a major muscle abnormality in chicken fillets, causing excessive hardness and chewiness. The WB condition can potentially cause big economical losses in the poultry industry by decreasing meat quality, increasing waste, degrading nutritional content, and reducing customer satisfaction. A histological technique using a light microscope has been the gold standard to characterize the sub-surface properties of the muscle with the WB condition, which is destructive, costly, time-consuming, and limited to analyzing only small sample areas. It is currently very challenging to assess the degree of WB myopathy objectively and rapidly in individual fillets. There is a need to develop an effective sensing technology for rapidly characterizing the WB condition by measuring the sub-surface cross-sections of the entire fillet at a high resolution. In this study, we utilized optical coherence tomography (OCT) to image the sub-surface microstructure of chicken muscle tissue along the entire fillet with a micrometer resolution. The OCT images provided valuable microstructural features, which were further analyzed using machine learning models to classify chicken fillets based on the WB severity. The results demonstrated a detection accuracy of up to 100% in detecting severe WB samples. The machine learning models achieved a classification accuracy of 95.0% in distinguishing normal from WB fillets. Overall, the successful application of large-scale OCT imaging demonstrated its effectiveness as a non-invasive method for evaluating WB in chicken meat. Furthermore, the study suggests that OCT imaging holds the potential for evaluating other agricultural and food products. [ABSTRACT FROM AUTHOR]

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COVID‐19 pandemic is considered a global crisis that adversely impacted the world economy. The virus possessed a serious threat to different sectors including agricultural, livestock, poultry and fish sectors in both developing and developed countries. COVID‐19 pandemic and the associated lockdown for a long period have not only caused enormous distress to the millions of poor and marginal farmers for saving their crops and/or livestock but also affected livestock, poultry production systems and associated value chains, nutrition, health care and labour availability. In addition, COVID‐19 pandemic significantly impacted the fishery sector through disruption in fish supply and value chains and had noteworthy effects on income of fish stakeholders, especially in developing countries. In this regard, the current review discussed the impact of COVID‐19 pandemic on agricultural, livestock, poultry and fish sectors. [ABSTRACT FROM AUTHOR]

Background: This paper reports the first pathological and molecular characterization of the novel variant of infectious bronchitis virus (IBV) D181 in poultry flocks in Morocco and Africa. Methods: The study includes six poultry farms, involving three flocks of layers aged between 28 and 67 weeks and three broiler flocks aged 27, 39 and 42 days from different regions of Morocco. In all affected layer flocks, a severe drop in egg production with poor eggshell quality was reported. Necropsy of dead birds was carried out, and samples of trachea, lungs, oviduct, ovaries, and kidneys were fixed in 10% neutral buffered formalin for histopathologic examinations, while other portions were stored at -20 °C for molecular analysis. Real time RT-qPCR for IBV gene group was performed, and IBV variants were identified. Partial S1 gene sequences were amplified by conventional RT-PCR, sequenced, and aligned for phylogenetic and amino acid similarity analysis. Results: Necropsy of dead birds revealed misshapen and hemorrhagic ovarian follicles with an edematous oviduct and severe reaction in the cecal tonsils. A caseous material accumulation in the sinus was noted in few birds. In contrast, the broiler flocks exhibited respiratory clinical signs such as difficulty in breathing, sneezing, tracheal rales, watery eyes and lethargy, associated with a decrease in feed consumption. Mortality in broiler ranged from 2 to 15%. Histopathological analysis of samples showed a lympho-plasmocytic inflammation in the oviduct, trachea, and lungs. Individual necrosis of epithelial cells, with sloughing of the bronchial epithelium and accumulation of desquamated cells with mucus in the airways, was observed in some birds. Partial S1 gene sequencing and phylogenetic analyses showed that the Moroccan strains were very closely related to D181 strains isolated in Dutch layers and breeders in 2018. Nucleotide sequence identities reached 90.9–95% with the Dutch isolates (strain CK/NL/D181/2018). Conclusion: Our sequencing results demonstrate for the first time that the D181 IBV genotype is circulating in Moroccan poultry. These findings justify permanent monitoring of circulating strains in order to appropriately adjust vaccination strategies to align with the evolving field situation. [ABSTRACT FROM AUTHOR]

Pullorum disease and fowl typhoid are caused by the Salmonella serovars Gallinarum biovars Pullorum and Gallinarum, respectively. The prevalence of these diseases varies across regions and is affected by different risk factors that remain insufficiently documented. To fill this knowledge gap, we have compiled a global dataset for its prevalence, drawing upon a collection of literature from the last seven decades obtained from bilingual databases. However, a more interactive and dynamic platform is still needed for both academics and policymakers to improve biosecurity measures, limit disease transmission, and prevent future outbreaks at the global and local levels. Here, we developed an advanced visualization platform to depict the prevalence of Salmonella Pullorum and Gallinarum, especially in China, which is categorized by geographical region and temporal span. The platform offers a user-friendly, efficient, and visually engaging tool to explore the prevalence of pullorum disease and fowl typhoid between 1945 and 2021 in different regions. Additionally, this platform allows users to understand the influence of various factors, such as breed, farm mode, economic usage and even the sex of the primary host, chickens, on the prevalence of this disease. We further provided a detailed overview of individual province within China. In particular, by selecting two different provinces on the interface, users can quickly visualize and grasp the disparities in disease prevalence between the chosen regions. This interactive toolkit enables a dynamic exploration of the patterns and factors contributing to the prevalence of Salmonella Pullorum and Gallinarum. This interactive platform is freely available open source at http://139.9.85.208/. [ABSTRACT FROM AUTHOR]

The highly pathogenic avian influenza 2.3.4.4b H5 viruses have been a cause for concern recently, as they have been responsible for continuous outbreaks since 2021. In China, the H5N6 subtype has been predominantly circulating in domestic poultry but has rarely been detected in wild birds over the past 3 years. In December 2023, novel reassortant 2.3.4.4b H5N6 viruses were resurgent in wild birds and domestic ducks in Eastern Asia. The viruses were reassorted with those of currently prevalent 2.3.4.4b H5N1 viruses of wild bird origin worldwide, as well as the H5N6 viruses that caused human infections in 2022 and low pathogenic avian influenza viruses, such as the H9N2 virus, which also contributed internal gene to the novel H5N6 viruses. Based on the phylogenetic analyses, we inferred that this recombination process occurred in migratory breeding sites in early 2023. Given the rapid transmission and high mutation capacity of currently circulating H5N1 viruses, as well as the strong pathogenicity of H5N6 viruses to humans, the novel recombinant viruses may continue to evolve and pose new threats to human health. Therefore, continuous surveillance of H5N6 viruses in wild birds and domestic poultry should be strengthened. [ABSTRACT FROM AUTHOR]

Vitamin A is essential for poultry health, influencing vision, growth, antioxidant defense, reproduction, and immune function. However, it is highly sensitive to degradation when exposed to light, moisture, heat, and oxygen. To address this, vitamin A is typically formulated as retinyl acetate in small beadlets. These beadlets are commonly included in premixes for industrial poultry diets. However, variations in beadlet formulations among different producers can lead to differences in stability and bioavailability, potentially impacting their effectiveness and biological value for poultry. Understanding the stability and bioavailability of various vitamin A sources is crucial for optimizing poultry feeding strategies and ensuring adequate vitamin A supply. The stability of vitamin A can be evaluated through several methods, including premix stability, stability during pelleting, storage stability in feed, and the stability of pure vitamin A products. Bioavailability, which reflects how effectively vitamin A is absorbed and utilized by the animal, is typically assessed through in vivo studies, with liver retinol levels serving as a key indicator. To enhance poultry production, it is important to select vitamin A sources that offer both high stability and bioavailability. Effective feed management, including the use of stable and readily absorbed forms of vitamin A, can improve poultry health, growth rates, and overall production efficiency. [ABSTRACT FROM AUTHOR]

Metal contamination of foodstuffs is a major public health challenge of increasing concern. The present study aimed to determine lead, cadmium and mercury in honey, cow’s milk and poultry eggs collected from the North-Eastern region of Algeria and to evaluate the health risks associated with their regular consumption. To this aim 30 samples of each foodstuff were analysed using ICP-MS. Among the quantified heavy metals, Pb was found at the highest level in both honey (0.752 ± 0.16 µg g−1) and poultry egg (0.988 ± 0.19 µg g−1) in the region of Skikda. The highest values of Cd (0.798 ± 0.12 µg g−1) and Hg (0.097 ± 0.02 µg g−1) were found in poultry eggs collected from the same region. For infants the Hazard Index was well above 1 in honey samples from all three locations, in cow’s milk collected from Mila and Skikda and in poultry eggs collected from Skikda. [ABSTRACT FROM AUTHOR]

Simple Summary: Mycotoxins are secondary metabolites of molds, primarily Penicillium, Fusarium, and Aspergillus species, that may be present in food and feed. Reports indicate that up to 25% of the world's cereal crops could be contaminated with these fungal toxins. Synbiotics, products that synergistically combine probiotics and prebiotics, can reduce harmful metabolites in the gastrointestinal tract by metabolizing or adsorbing toxic substances, including mycotoxins. In the present study, turkeys were fed diets contaminated with ochratoxin A and supplemented with probiotic or synbiotic preparations. The addition of probiotic and synbiotic preparations based on lactic acid bacteria strains, inulin, and Saccharomyces cerevisiae yeast to ochratoxin A-contaminated diets in commercial turkey farming may improve health status and reduce mycotoxin accumulation in poultry organs and tissues. The aim of this study was to evaluate carcass quality and analyze gastrointestinal functional status, ochratoxin A (OTA) accumulation in tissues and organs, and the health status of turkeys fed diets contaminated with OTA and supplemented with synbiotic preparations in comparison with commercial probiotic feed additives. The research involved 120 female BIG 6 turkeys, divided into six treatment groups (five replicates, four birds per replicate). Wheat naturally contaminated with OTA (662.03 μg/kg) was used in turkey diets. Turkeys in group 1 received an OTA-contaminated diet without additives. Groups 2 and 3 received 0.4 g/kg of probiotic preparation BioPlus 2B or Cylactin. Groups 4, 5, and 6 received 0.5 g/kg of synbiotics S1, S2, or S3. The following parameters were monitored: growth performance, carcass quality, gastrointestinal tract structure and digesta pH, health status, and concentrations of OTA in the blood and tissues of turkeys. The study found no significant differences in the growth performance and carcass quality of turkey. However, the introduction of probiotics or synbiotics into OTA-contaminated feed mixtures resulted in a reduced pH of the digesta in certain sections of the turkey digestive tract (p < 0.05). Additionally, the tested synbiotic additives significantly reduced liver weight in turkeys at weeks 6 and 15 (p < 0.05). The addition of probiotic and synbiotic preparations based on lactic acid bacteria strains, inulin, and S. cerevisiae yeasts to OTA-contaminated diets in commercial turkey farming may improve health status (p < 0.05) and reduce mycotoxin accumulation in organs and tissues of poultry (p < 0.05). [ABSTRACT FROM AUTHOR]

Simple Summary: This present study evaluated the efficacy of dietary benzoic acid (BA) and oregano essential oil (OEO) separately or together as a substitute for a commercial coccidiostatic drug (salinomycin) on growth performance and physiological and immunological responses in broiler chickens challenged with Eimeria species. It was found that the BA and OEO applied alone or in combination significantly reduced gut pathogenic bacteria (Salmonella and Escherichia coli) and Eimeria spp. and concurrently enhanced the Lactobacillus population with better body weight gain, improved feed utilization, and superior hematological values. It boosted the immune system by enhancing Eimeria-specific immunoglobulin Y titer and up- and down-regulated various immune gene expressions to protect the chickens from inflammatory reactions that were not demonstrated in salinomycin-treated birds. This study suggests that the combined application of OEO and BA can substitute for salinomycin in controlling coccidiosis as well as improving growth performance, gut health, and immune responses in broiler chickens. To overcome the antimicrobial residues in food, benzoic acid (BA) and oregano essential oil (OEO) are used in the broiler chicken industry. Independently, both exerted anticoccidial and antimicrobial actions and improved growth performance in broiler chickens. Their effect may be multiplied when they are used in combination. This present study was carried out to evaluate the efficacy of dietary BA and OEO alone or in combination as a substitute for a commercial coccidiostatic drug on growth performance and physiological and immunological responses in broiler chickens challenged with Eimeria species. A total of 252 unsexed 1-day-old broiler chicks were equally allotted to 36 pens, each pen containing seven chicks. The pens were randomly assigned to six treatments with six pens (replicates) for each treatment (n = 6)—(i) negative control, (ii) positive control, coccidia-challenged and non-treated, (iii) supplemented with salinomycin (an anti-coccidial drug) at 60 mg/kg of feed and coccidia-challenged, (iv) supplemented with BA at 500 mg/kg of feed and coccidia-challenged, (v) supplemented with OEOat 500 mg/kg of feed and coccidia-challenged (OEO), and (vi) supplemented with BA at 500 mg/kg of feed and OEO at 500 mg/kg of feed and coccidia-challenged (B&O). The liver enzymes and thyroxine and creatinine levels were not affected (p > 0.05) both in coccidia-challenged and supplemented chickens. The BA and OEO applied separately or in combination (B&O) significantly (p < 0.05) reduced gut pathogenic bacteria (Salmonella and Escherichia coli) and Eimeria spp., and concurrently enhanced (p > 0.05) the Lactobacillus population with better body weight gain, improved feed utilization, and superior hematological values. It also up-regulated (p > 0.05) the interferon-γ gene expression and down-regulated (p < 0.05) the interleukin-10 and Toll-like receptor-4 gene expression to protect the chickens from inflammatory reactions, which were not demonstrated in salinomycin-treated birds. The B&O supplementation increased (p < 0.05) the immune system by enhancing Eimeria-specific immunoglobulin Y titer and lymphocyte proliferation response. This study suggests that the combined application of OEO and BA can substitute for a commercial anti-coccidial agent (salinomycin) in controlling coccidiosis as well as improving growth performance, gut health, and immune responses in broiler chickens with a means of antimicrobial-resistant free food products. [ABSTRACT FROM AUTHOR]

Keel bone damage, include deviations and fractures, is common in both white and brown laying hens, regardless of the housing system. Radiography for assessing birds' keel bones is was proposed by previous studies. However, radiographs show only 2 out of 3 dimensions of the dissected keel bones. The current study aimed to (1) investigate the association of radiographic optical density (keel and tibiotarsal) and geometry (keel) with dissected keel bone pathology. Previous studies suggested that keel bone fractures may result from internal pressure exerted by pelvic cavity contents. The current study also aimed to (2) investigate the potential associations between pelvic dimensions and measures of keel bone damage. A sample of 200 laying hens on a commercial farm were radiographed at 16, 29, 42, 55, and 68 weeks, and culled at the end of the laying period (week 74). The birds were examined post-mortem for pelvic dimensions and underwent whole-body radiography, followed by keel and tibiotarsal bone dissection and radiography, and keel bone scoring. The radiographs were used to estimate radiographic optical density (keel and tibiotarsal bone) and keel bone geometry (ratio of keel bone length to mid-depth). The method for on-farm radiography of laying hens, including live bird restraint, positioning for live keel imaging, and post-imaging measurements, was developed, tested, and found to be reproducible. The radiographs (1,116 images of 168 birds) and the respective measurements and post-mortem scores of keel bones are also provided for further development of radiographic metrics relevant to keel bone damage. Some longitudinal radiographic measurements of keel geometry (ratio of length to mid-depth) and optical density (keel and tibiotarsal) showed associations with the damage (deviations/fractures) observed on the dissected keel bones. The associations of keel damage were clearer with the radiographic keel geometry than with keel and tibiotarsal optical density, also clearer for the keel deviations than for keel fractures. The higher radiography ratio of keel length to middepth at weeks 42, 55 and 68 of age, the larger deviations size observed on the dissected keels at age of 74 weeks. The higher the tibiotarsal radiographic optical density at week 55 of age, the lower deviations size and fractures count observed on the dissected keels at age of 74 weeks. Pelvic dimensions showed a positive correlation with body weight, but a larger pelvic cavity was associated with increased keel bone damage. These findings lay the foundations for future use of on-farm radiography in identifying appropriate phenotypes for genetic selection for keel bone health. [ABSTRACT FROM AUTHOR]

We characterized 15 H5N1 HPAI viruses from different small- and medium-scale poultry flocks across Bangladesh during 2018–2021 based on their complete genome sequences. The antigenic relatedness of H5N1 HPAI viruses from different timepoints was analysed. During 2020–2021, 42.11% of the flocks tested positive for at least one of the respiratory infections, with 15.79% showing influenza A virus, of which 8.77% tested positive for HPAIV H5N1. Co-infections with two to four pathogens were detected in 15.8% of flocks. Phylogeny and gene constellation analyses based on complete genome sequences of 15 HPAI viruses revealed the continuing circulation of H5 clade 2.3.2.1a genotype G2 viruses. In the HA protein of the study isolates, functionally meaningful mutations caused the loss of an N-linked glycosylation site (T156A), a modified antigenic site A (S141P), and a mutation in the receptor binding pocket (E193R/K). Consequently, antigenic analysis revealed a significant loss of cross-reactivity between viruses from different host species and periods. Most viruses displayed oseltamivir resistance markers at positions V96, I97, S227, and N275 (N1 numbering) of the NA protein. In addition, for the PB2, M1, and NS1 proteins, significant mutations were noticed that have been associated with polymerase activity and increased virulence for mammals in all study isolates. These results highlight the need for intensified genomic surveillance of HPAI circulating in poultry in Bangladesh and for establishing appropriate control measures to decrease the circulation of these viruses in poultry in the country. [ABSTRACT FROM AUTHOR]

Between 15 June and 20 September 2024, 75 highly pathogenic avian influenza (HPAI) A(H5) and A(H7) virus detections were reported in domestic (16) and wild (59) birds across 11 countries in Europe. Although the overall number of detections in Europe continued to be low compared to previous epidemiological years, an increase in cases along the Atlantic, North Sea and Baltic coasts was notable, particularly an increase in the detection of HPAI viruses in colony‐breeding seabirds. Besides EA‐2022‐BB and other circulating genotypes, these detections also included EA‐2023‐DT, a new genotype that may transmit more efficiently among gulls. In Germany, HPAI A(H7N5) virus emerged in a poultry establishment near the border with the Netherlands. No new HPAI virus detections in mammals were reported in Europe during this period, but the number of reportedly affected dairy cattle establishments in the United States of America (USA) rose to >230 in 14 states, and HPAI virus was identified in three new mammal species. Between 21 June and 20 September 2024, 19 new human cases with avian influenza virus infection were reported from the USA (six A(H5N1) cases and five A(H5) cases), Cambodia (five A(H5N1) cases, including one fatal), China (one fatal A(H5N6) case and one A(H9N2) case), and Ghana (one A(H9N2) case). Most of the human cases (90%, n = 17/19) had reported exposure to poultry, live poultry markets, or dairy cattle prior to avian influenza virus detection or onset of illness. Human infections with avian influenza viruses remain rare and no evidence of human‐to‐human transmission has been documented in the reporting period. The risk of infection with currently circulating avian A(H5) influenza viruses of clade 2.3.4.4b in Europe remains low for the general public in the European Union/European Economic Area (EU/EEA). The risk of infection remains low‐to‐moderate for those occupationally or otherwise exposed to infected animals or contaminated environments. [ABSTRACT FROM AUTHOR]

Environmental changes have an impact on agriculture, especially the production of poultry. These changes have caused grave concerns that will negatively affect the health and productivity of chickens. We must consider illumination, density, and dietary aspects when determining the optimal environmental conditions for poultry rearing and output. Each of these variables influences the performance and behavior of birds uniquely. A crucial aspect of evaluating animal well-being is that it understands animal behavior. Artificial lighting has been widely investigated in poultry production over the last fifty years to enhance muscle gain and egg production while preserving an effective feed conversion ratio, bird health, and well-being. Yet, researchers and breeders still disagree over the ideal light quality and quantity, density, and feeding levels for poultry farming, particularly for chickens. This evaluation, therefore, covered the most up-to-date practical methods for enhancing illumination, density, and feeding-related aspects of poultry behavior, health, and production. [ABSTRACT FROM AUTHOR]

Since the discovery of viruses, humans have always faced a great challenge in dealing with their subsequent diseases. Coronaviruses have created huge challenges in the world. Coronaviruses are RNA genome viruses from the Coronaviridae family that can cause different diseases in both poultry and humans, but no evidence has been provided for their zoonotic potential, which may be due to the different genera of the viruses that cause diseases in these hosts. There are different ways of transmission for the coronaviruses with airborne being the most common and important route. However, the role of migratory birds in their spread has been recently noticed. Due to the novelty and importance of this issue, we decided to conduct a review study on the role of migratory birds in the spread of coronaviruses. The results show that due to the high possibility of the virus mutations in the host's body, the interspecies barrier can be broken and we can see the direct transmission of the coronaviruses from birds to humans. However, due to the novelty of this topic, more studies are required to acquire a comprehensive knowledge on this matter. [ABSTRACT FROM AUTHOR]

Carbohydrates are the main macromolecule of poultry feed (40-70 %), categorized into digestible and indigestible forms. Poultry uses digestible carbohydrates to supply energy. Still, the indigestible part (water-soluble and nonsoluble) has different roles in anatomy, histology, water loss, bacterial microflora, mucosal health, normal secretions, feed transport time, and digestion rate in the gastrointestinal tract. Cereals (like corn), the carbohydrate source in poultry feed, can contain mycotoxins or water-soluble indigestible fibers; thus, some mycotoxin-free commercial products contain insoluble indigestible carbohydrates. In this study, the effect of micronized Lignocelluloses (Under trade name ARBOCEL®) was evaluated on calcium metabolism, eggshell quality, and performance of commercial Hy-Line W-36 layers. The results showed that the product had a good effect on the evaluated factors, but in some cases, there was not any significant effect that compared to other groups. However, it is better to evaluate the impact of using this product in various concentrations, ages, periods, heat-stress conditions, and digestive tract microflora disturbance, which is beyond the aim of this study and can be subject to subsequent researches. [ABSTRACT FROM AUTHOR]

The poultry industry is facing challenges from multiple drug-resistant pathogens such as Cam‐ pylobacter, Salmonella, Escherichia coli, and Clostridium perfringens. Excessive use of antibiotics disrupts the balance of the normal microbial community in the intestines, leading to dysbiosis, immune suppression, and secondary infections. Bacteriophages are viruses that can specifically infect and kill bacteria. The use of bacteriophage preparations to control bacterial diseases in poultry is of great significance for ensuring poultry health and improving farming efficiency. Therefore, this review focuses on the current applications of bacteriophages against poultry pathogens, aiming to provide a comprehensive understanding of the potential of bacteriophages in poultry farming and to serve as an important reference for future research and applications. [ABSTRACT FROM AUTHOR]

Interactions between wildlife and livestock can lead to cross‐species disease transmission, which incurs economic costs and threatens wildlife conservation. Wild waterfowl are natural hosts of avian influenza viruses (AIVs), are often abundant near poultry farms, and have been linked to outbreaks of AIVs in poultry. Interspecific and seasonal variation in waterfowl movement and habitat use means that the risk of disease transmission between wild birds and poultry inevitably varies across species, space, and time. Here, we used GPS telemetry data from 10 waterfowl species in and near California's Central Valley, a region where both wild waterfowl and domestic poultry are abundant, to study selection of poultry farms by waterfowl across diel, seasonal, and annual cycles. We found that waterfowl selected for wetlands, open water, protected areas, and croplands, which meant that they generally avoided habitats that were likely to be used for poultry farming. These selection patterns were linked to species' ecology and diel behavioral patterns, such that avoidance of poultry habitats was stronger for local or partial migrants than for long‐distance migrants, and stronger during daytime than at night. We then combined these habitat selection results with data on poultry farm locations to map risk of waterfowl–poultry contact across the Central Valley. Average selection strength at poultry farms was low, suggesting that current placement of poultry farms is generally effective for limiting risk of contact with wild birds. When we combined these habitat selection results with data on species' abundances and AIV infection prevalence, we found dramatic variation in potential AIV transmission risk among species. These results could be used to prioritize surveillance and biosecurity efforts for regions and times of relatively high risk. More generally, these results highlight that fine‐scale movement data can help identify interspecific, seasonal, and diel patterns in animal behaviors that affect wildlife and poultry health. [ABSTRACT FROM AUTHOR]

There is a growing body of literature exploring governance in regional value chains (RVCs) in Africa. Agro-processing RVCs are of particular interest, as this is where the manufacturing capabilities of most African countries lie. The research on RVCs in Africa highlights governance by lead firms and government actors as an important aspect in determining the structure and outcomes within these RVCs. Using the global value chain (GVC) analytical framework, this article analyses governance in the poultry RVC in South Africa, Zambia and Zimbabwe. The paper finds that the poultry RVC is a bilateral oligopoly, where the lead firms are supermarkets and large poultry producers with exclusive rights to multi-territorial breeding rights. The article highlights that both large producers and the supermarkets play an important role in the formation and structure of the poultry RVC, with important implications for regional integration and industrialisation. [ABSTRACT FROM AUTHOR]

Production of phytases from Pichia kudriavzevii FSMP-Y17 yeast was enhanced by optimization of the fermentation variables under submerged fermentation conditions. Maximum 3.67 U/mL of phytases was produced using 2.5% orange peel flour as a substrate, at pH 5.0 and temperature 50°C, by supplementing fermentation medium with 0.2% (wt/vol) galactose as carbon source and 0.2% (wt/vol) ammonium nitrate as a nitrogen source. Addition of sodium phytate to the production medium, however, did not cause any enhancing effect on phytase production by P. kudriavzevii FSMP-Y17 under submerged fermentation. The yeast enzyme purified to near homogeneity in three steps (ammonium sulphate precipitation, anion exchange chromatography and gel filtration) was found showing thermostability (from 40 to 70°C, with highest activity at 55°C) and stable at acidic pH (from 4.0 to 7.0, with highest activity at pH from 5.0 to 6.0). The purified enzyme was added to the diets of the broilers. The diets enriched with yeast phytase showed increased feed intake in the birds, while food conversion rate was lowered. The phytase supplementation caused better phosphorus retention in the birds consequently resulting in enhanced growth of the broilers. The augmented diets also showed improved egg production and egg quality in the hens. [ABSTRACT FROM AUTHOR]

Avian reovirus (ARV) has been continuously affecting the poultry industry in Pennsylvania (PA) in recent years. This report provides our diagnostic investigation on monitoring ARV field variants from broiler chickens in Pennsylvania. Genomic characterization findings of 72 ARV field isolates obtained from broiler cases during the last 6 years indicated that six distinct cluster variant strains (genotype I-VI), which were genetically diverse and distant from the vaccine and vaccine-related field strains, continuously circulated in PA poultry. Most of the variants clustered within genotype V (24/72, 33.3%), followed by genotype II (16/72, 22.2%), genotype IV (13/72, 18.1%), genotype III (13/72, 18.1%), genotype VI (05/72, 6.94%), and genotype I (1/72, 1.38%). The amino acid identity between 72 field variants and the vaccine strains (1133, 1733, 2408, 2177) varied from 45.3% to 99.7%, while the difference in amino acid counts ranged from 1–164. Among the field variants, the amino acid identity and count difference ranged from 43.3% to 100% and 0 to 170, respectively. Variants within genotype V had maximum amino acid identity (94.7–100%), whereas none of the variants within genotypes II and VI were alike. These findings indicate the continuing occurrence of multiple ARV genotypes in the environment. [ABSTRACT FROM AUTHOR]

Salmonellosis represents a significant economic and public health concern for the poultry industry in Africa, leading to substantial economic losses due to mortality, reduced productivity, and food safety problems. However, comprehensive information on the burden of poultry salmonellosis at the continental level is scarce. To address this gap, a systematic review and meta-analysis were conducted to consolidate information on the prevalence and circulating serotypes of poultry salmonellosis in African countries. This involved the selection and review of 130 articles published between 1984 and 2021. A detailed systematic review protocol was structured according to Cochrane STROBE and PRISMA statement guideline. From the 130 selected articles from 23 different African countries, the overall pooled prevalence estimate (PPE) of poultry salmonellosis in Africa was found to be 14.4% (95% CI = 0.145–0.151). Cameroon reported the highest PPE at 71.9%. The PPE was notably high in meat and meat products at 23%. The number of research papers reporting poultry salmonellosis in Africa has shown a threefold increase from 1984 to 2021. Salmonella Enteritidis and Typhimurium were the two most prevalent serotypes reported in 18 African countries. Besides, Salmonella Kentucky, Virchow, Gallinarum, and Pullorum were also widely reported. Western Africa had the highest diversity of reported Salmonella serotypes (141), in contrast to southern Africa, which reported only 27 different serotypes. In conclusion, poultry salmonellosis is highly prevalent across Africa, with a variety of known serotypes circulating throughout the continent. Consequently, it is crucial to implement strategic plans for the prevention and control of Salmonella in Africa. RESEARCH HIGHLIGHTS The pooled sample prevalence of poultry salmonellosis in Africa is high (14.4%). The highest PPE was recorded in meat and meat products. Salmonella serotypes of zoonotic importance were found in all sample types. Salmonella Enteritidis and Typhimurium are common serotypes spreading in Africa. [ABSTRACT FROM AUTHOR]

The intestinal microbe population has a considerable impact on the physiological state of poultry. Nutritional intervention can be used to enhance the equilibrium of the gut microbiota in chickens, leading to good physiological effects. Various nutritional interventions have been implemented, including feed additives, vitamins, and fermented and functional feeds. While numerous studies have shown the efficacy of nutritional strategies, others have noted the variability of these interventions on poultry’s physiological state. Various factors can influence the effectiveness of nutritional interventions on the physiological conditions of poultry, such as the types of feed additives or active components, duration and method of administration, feed composition, environmental conditions during rearing, quality of day-old-chick, type and age of poultry, hygiene, infection, stress, and other related variables. Feed additives, when combined with nutritional components or other active chemicals, can have synergistic and complementary effects. These impacts could improve the effectiveness and reliability of the nutritional interventions on physiological parameters and poultry productivity. Furthermore, combinations can include feed additives or active components like probiotics and acidifiers, probiotics and enzymes, phytobiotics and enzymes, and plant-based materials and chitosan. The combinations show synergistic and complementary benefits, improving physiological conditions in chickens more than using feed additives or active substances alone. Overall, nutritional intervention can be used to improve the microbial balance in poultry intestines and boost their physiological state. Moreover, integrating feed additives with other active components might enhance the physiological circumstances of chickens due to the synergistic effect produced by their combination. [ABSTRACT FROM AUTHOR]

Eggs are among the most nutritious foods, but they are perishable. Immediately after they are laid, ageing processes begin in shell eggs, altering their chemical, physical and functional properties. This study aimed to determine the effect of storage temperature on the shelf life of hen eggs according to changes in some important physical properties (weight, pH, Haugh Unit, Albumen Index, and Yolk Index). The studied temperatures were selected as possible refrigerator and room temperatures (10, 20 and 30°C). It was revealed that temperature significantly influenced egg quality, with the most significant effects observed in the Haugh unit and pH due to weight changes. The highest quality loss occurred at 30°C. The activation energies for each quality parameter were determined using the Arrhenius equation. The pH of the fresh egg was 7.6 ± 0.1 and increased to over 8.5 – 9.0 during storage, depending on the temperature. Haugh unit, albumen index, and yolk index decreased, and the area of both yolk and albumen increased during storage. [ABSTRACT FROM AUTHOR]

Objectives: Animals are a potential source of Methicillin Resistant Staphylococcus aureus. This study evaluated the antibiotics susceptibility pattern of S. aureus isolates from breeders and livestock. Methods: S. aureus strains were isolated from 180 livestock and 48 livestock farmers and identified using standard methods. Antibiotic susceptibility profiles and MRSA status were determined via disk diffusion susceptibility method. Results: Among farm workers, 37.5% were colonized by S. aureus, with pig farm workers exhibiting the highest prevalence (56.2%), cattle herders (37.5%), and goat farm workers (18.7%). MRSA carriage among livestock isolates was 41.3%, while, six isolates from the poultry farm worker were MRSA, representing a carriage of 33.3%. Drug susceptibility profiles revealed differential patterns between isolates from breeders and animals. Gentamicin and levofloxacin demonstrated higher efficacy against farm worker isolates compared to animal isolates. Resistance to cefuroxime was higher among animal isolates (84.1%) as against the 66.7% for the breeders. Conclusion: The identification of multidrug-resistant S. aureus strains underscores the risk posed to humans in contact with animals. These findings stress the importance of monitoring and managing MRSA transmission between animals and humans. [ABSTRACT FROM AUTHOR]

This article explores the impact of ectoparasitic mites on cage-free egg production in the United States and strategies for managing these mites. The transition to cage-free housing has resulted in an increase in mite infestations, which negatively affect the health, behavior, and productivity of hens. The article discusses the genetic variability for mite resistance and the potential use of genomic selection to improve mite resistance in poultry populations. It also provides information on the biology of the northern fowl mite and poultry red mite, as well as various management strategies, including the use of pesticides and biosecurity measures. The authors stress the importance of monitoring and managing mite infestations in egg production and call for further research to develop effective and sustainable strategies for improving hen welfare. They suggest that genomic selection could be a promising approach for breeding mite-resistant poultry strains. [Extracted from the article]

Background: Extended-spectrum-β-lactamase (ESBL) and carbapenemase-producing Enterobacterales and Acinetobacter spp. pose significant challenges as nosocomial pathogens, demonstrating resistance against various antimicrobials. Their presence in food suggests that hospital kitchens could serve as antibiotic resistance reservoirs leading to patients' infection. Objectives: The aim of this study was to assess the prevalence and characteristics of β-lactam-resistant strains of Escherichia coli, Klebsiella pneumoniae, and Acinetobacter spp. isolated from the kitchen environment and from the staff of two Greek hospitals. Methods: Strains were recovered after selective isolation with β-lactams and were identified with MALDI–TOF MS. Antimicrobial susceptibility and presence of common β-lactamase genes were evaluated. Protein profiles were examined to analyze potential relationships of the strain with those from hospital patients. E. coli strains were further categorized into phylogenetic groups. Results: The overall prevalence in the kitchen environment was 4.5%, 1.5%, and 15.0% for E. coli, K. pneumoniae, and Acinetobacter spp., respectively, whereas the prevalence of Acinetobacter spp. in human skin was 4.0%. Almost all strains were multidrug-resistant. All E. coli strains were ESBL producers and belonged to phylogroups A and B1. All K. pneumoniae and seven Acinetobacter strains were carbapenemase-producers. A protein profile analysis showed relatedness between chicken and kitchen environment strains, as well as between kitchen environment and patient strains originated either from the same or from different hospitals. Conclusions: The results suggest that hospital kitchens may act as important pathogen hotspots contributing to the circulation of resistant strains in the hospital environment. [ABSTRACT FROM AUTHOR]

Simple Summary: Avian influenza (AI) is an infectious disease and could lead to death, health problems, and economic losses. Therefore, this study aimed to gather information about the compliance with and perceived effectiveness of AI control measures (applicable during high-risk periods in Flanders, North of Belgium, in 2021) by professional laying hen farmers and private bird keepers. Overall, self-reported compliance was high among professional laying hen farmers but much less among private bird keepers. Among private bird keepers, compliance and perceived effectiveness were lowest for confining the birds indoors, whereas for farmers, it was lowest for placing nets over the free-range. This study highlights the need for information campaigns explaining to private bird keepers, particularly the need for the various AI control measures imposed. Should these campaigns prove unsuccessful, local authorities might need to implement stricter enforcement of existing control measures or explore alternative ways to increase compliance, such as information posters in relevant stores for private bird keepers or meeting private bird keeper interest groups to provide broader support. Competent authorities of many countries, including Belgium, impose control measures (preventing wild bird access to feeders and water facilities, indoor confinement of captive birds, or fencing off outdoor ranges with nets) on professional and non-professional keepers of birds to prevent the spread of avian influenza (AI). Flemish laying hen farmers (FAR, n = 33) and private keepers of captive birds (PRI, n = 263) were surveyed about their opinion on and compliance with AI measures legally imposed during the most recent high-risk period before this survey in 2021. Participants answered questions on a 5-point Likert scale (1 = the worst, 3 = neutral, and 5 = the best). FAR indicated better compliance with the AI measures than PRI, except for net confinement. FAR indicated that they and other poultry farmers complied better with AI measures than PRI. Additionally, PRI indicated that they better complied than other PRI keepers. FAR regarded the AI measures as more effective than PRI. To prevent the spread of AI more effectively, national authorities could focus on information campaigns explaining to private bird keepers the need for the various control measures that they impose. If these campaigns fail, local authorities may need stricter enforcement or alternative ways to increase compliance. [ABSTRACT FROM AUTHOR]

Background/Objectives: The ongoing avian influenza (H5N1) outbreak, one of the most widespread and persistent in recent history, has significantly impacted public health and the poultry and dairy cattle industries. This review covers lessons from past outbreaks, risk factors for transmission, molecular epidemiology, clinical features, surveillance strategies, and socioeconomic impacts. Since 1997, H5N1 has infected over 900 individuals globally, with a fatality rate exceeding 50%. Key factors influencing infection rates include demographic, socioeconomic, environmental, and ecological variables. The virus's potential for sustained human-to-human transmission remains a concern. The current outbreak, marked by new viral clades, has complicated containment efforts. Methods: This review discusses how to integrate technological advances, such as mathematical modeling and artificial intelligence (AI), to improve forecasting, hotspot detection, and early warning systems. Results: We provide inventories of data sources, covering both conventional and unconventional data streams, as well as those of mathematical and AI models, which can be vital for comprehensive surveillance and outbreak responses. Conclusion: In conclusion, integrating AI, mathematical models, and technological innovations into a One-Health approach is essential for improving surveillance, forecasting, and response strategies to mitigate the impacts of the ongoing avian influenza outbreak. Strengthening international collaboration and biosecurity measures will be pivotal in controlling future outbreaks and protecting both human and animal populations from this evolving global threat. [ABSTRACT FROM AUTHOR]

Duck hatchery waste is an alternative feed ingredient for protein sources in poultry. This study aimed to determine the effect of duck hatchery waste supplementation on growth performance, and income over feed cost of hybrid ducks. A total of 120-day-old male hybrid ducks (body weight: 61.4±4.9g) were randomly divided into three treatments (4 replicates per treatment, 10 ducks per replicate). At 0-14 days of age, ducks were fed the same complete feed in all treatments. After 14 days of age, ducks were fed an experimental diet until 35 days of age. The treatment feed consists of a basal diet (P0), basal diet with 8% hatchery waste (P1), and basal diet with 16% hatchery waste (P2). Supplementation of 8% and 16% duck hatchery waste increased accumulated feed consumption and body weight gain of hybrid ducks on day 35 (P<0.05). However, feeding duck hatchery waste did not affect the feed conversion ratio of hybrid ducks on week 5. In contrast, supplementation of duck hatchery waste decreased the FCR of hybrid ducks at weeks 3 and 4. Furthermore, the inclusion of duck hatchery waste in the duck diet increased revenue generation from duck sales and increased the IOFC value. In conclusion, supplementation of duck hatchery waste can increase feed intake and body weight gain, duck sales and IOFC value of hybrid ducks. [ABSTRACT FROM AUTHOR]

Knowledge and perception of poultry farmers is one of key factors to improve disease prevention practice. By collecting data from small-scale poultry farmers, this study aimed to determine the knowledge and perception of farmers towards highly pathogenic avian influenza (HPAI) prevention practice and analyse the effect of social profiles, farmer's raising behaviours on knowledge and perception of farmers. The study applied purposive sampling method to select 159 respondents in Tra Vinh Province and use multiple regression analysis to analyze data. The results showed that farmers were mostly more than 40 years old and not completed high school yet. Farmers have raised poultry under traditional methods with some feed and water from natural sources. Farmers keep cleaning and disinfect their farm frequently. The study recorded that farmer had a good knowledge and perception towards HPAI. There were some factors significantly affect the knowledge and perception of farmers including gender, training, income, poultry species, water source. Particularly, when farmers were male, joined in HPAI prevention training activities and not use water from natural source, their knowledge significantly increased. Besides, the increase in one unit of gender, income, poultry species, water source significantly increased the perception of poultry farmers. Other variables had no significant effect. It can be concluded that gender, training, income, poultry species, water source could be used to improve farmer's knowledge and perception towards HPAI prevention practice. [ABSTRACT FROM AUTHOR]

As global demand increases for poultry products, innovative feeding strategies that reduce resource efficiency and improve food safety are urgently needed. This paper explores the potential of alternative sustainable poultry feeding strategies aimed at achieving SDG2 (Zero Hunger) while increasing production performance and food quality, focusing on the potential recycling of by-products, plants, and food waste derived from fruits, vegetables, and seeds, which account for up to 35% annually. The paper provides a review analysis of the nutritional (protein, fat, fiber, and ash) and minerals (i.e., calcium, phosphorus, zinc, manganese, copper, and iron) content as well as the bioactive compounds (polyphenols, antioxidants, carotenoids, fatty acids, and vitamins) of alternative feed ingredients, which can contribute to resource efficiency, reduce dependency on conventional feeds, and lower production costs by 25%. The nutritional benefits of these alternative feed ingredients, including their effects on poultry production and health, and their potential for improving poultry product quality, are presented. Carrot, paprika, rosehip, and some berry waste represent a great source of carotenoids, polyphenols, and vitamins, while the seed meals (flax, rapeseed, and sea buckthorn) have been reported to enhance the essential fatty acid composition in eggs and meat. Numerous plants (basil, sage, rosemary, and lettuce) are natural reservoirs of bioactive compounds with benefits for both animal and food products. Some challenges in implementing these alternative sustainable feeding strategies, including inconsistencies in quality and availability, the presence of anti-nutrients, and regulatory barriers, are also explored. In conclusion, future research directions in sustainable poultry feeding with alternative feed ingredients should be considered to achieve SDG2. [ABSTRACT FROM AUTHOR]

Background: The present study aimed to investigate the impact of the light-emitting diode (LED) green light alone or in combination with melatonin on pecking-related hormone regulation during incubation under normal and under hormonal stress conditions in breeder eggs. This study was divided into 2 experiments: In the first experiment effect of LED green light incubation on pecking-related hormones under normal conditions, on Hy-line brown (low pecking phenotype) and Roman pink (high pecking phenotype) eggs were tested. The 296 eggs of each strain were divided into two groups: LED green light incubation and dark incubation (control), each containing four replicates (37 eggs/replicate). The second experiment was conducted to evaluate the effect of LED green light incubation alone or in combination with melatonin under hormonal stress conditions on Roman pink eggs. A total of 704 Roman pink eggs were taken and divided into four groups, each consisting of 176 eggs. Each group was further divided into 2 subgroups, LED green light-regulated incubation and dark incubation with 88 eggs per subgroup, having 4 replicates of 22 eggs each. The groups were as follows: corticosterone solution injection (CI), corticosterone + melatonin mixed solution injection (CMI), Phosphate buffer solution injection (PI), and no injection (UI). Results: Results of the first experiment revealed a higher level of serotonin hormone and lower corticosterone hormone in Hy-Line brown embryos compared to Roman pink embryos during dark incubation. The LED green light incubation significantly (P < 0.05) increased the level of 5-HT while decreasing the CORT level in Roman pink embryos indicating its regulatory effect on pecking-related hormones. Results of the second experiment showed that LED green light incubation significantly (P < 0.05) alleviated the CORT-induced hyperactivity of plasma 5-HT in Roman pink embryos. Furthermore, Melatonin (MLT) injection and LED green light together significantly (P < 0.05) reduced the hormonal stress caused by corticosterone injection in the eggs. Conclusions: Overall, the LED green light regulatory incubation demonstrated a regulatory effect on hormones that influence pecking habits. Additionally, when coupled with MLT injection, it synergistically mitigated hormonal stress in the embryos. So, LED green light incubation emerged as a novel method to reduce the damaging pecking habits of poultry birds. [ABSTRACT FROM AUTHOR]

The poultry industry, a cornerstone of global food security, faces dynamic challenges exacerbated by viral diseases. This review traces the trajectory of poultry vaccination, evolving from traditional methods to the forefront of innovation Virus-Like Particle (VLP) vaccines. Vaccination has been pivotal in disease control, but traditional vaccines exhibit some limitations. This review examines the emergence of VLPs as a game-changer in poultry vaccination. VLPs, mimicking viruses without replication, offer a safer, targeted alternative with enhanced immunogenicity. The narrative encompasses VLP design principles, production methods, immunogenicity, and efficacy against major poultry viruses. Challenges and prospects are explored, presenting VLP vaccines as a transformative technique in poultry disease control. Understanding their potential empowers industry stakeholders to navigate poultry health management with precision, promising improved welfare, reduced economic losses, and heightened food safety. [ABSTRACT FROM AUTHOR]

ABSTRACT Aim Methods and Results Conclusion Backyard production systems (BPS) represent an interface of contact between people, domestic and wild animals. Studies conducted in Chile during the last decade have provided extensive evidence of influenza A virus (IAV) circulation in backyard poultry and swine. The aim of this study was to investigate exposure practices of humans to animal‐origin IAV within backyards.Backyard farmers and household members of a total of 101 BPS in the proximity of wetlands located throughout Chile were interviewed between 2021 and 2022. Data were collected on the nature of human–animal contacts through participation in productive activities conducted within backyards, which was used to estimate participants' exposure risk to animal‐origin IAV. Additionally, RT‐qPCR and serologic IAV active surveillance was carried out in backyard animals. Multilinear regression was used to identify factors associated with exposure risk. Overall, IAV prevalence was 10.1% (95% CI: 4.7%–15.5%) and seroprevalence was 43.5% (95% CI: 29.7%–54.2%), both at the BPS level. Of 180 interviewees, 86% reported participating regularly in poultry or swine exposure activities within the backyard. A greater participation of male participants was observed when evaluating swine exposure activities, while female participation was greater for some activities related to poultry handling. Handwashing was a very extended hygiene practice; however, the use of personal protective equipment was uncommon. Different factors related to participants, households and backyards were associated with an increased exposure risk of participants to animal‐origin IAV: (i) older age, (ii) less years of education, (iii) no off‐farm work, (iv) greater backyard production value and (v) greater household consumption of backyard products.These results indicate the circulation of IAV in BPS and the frequent human–animal contact at this interface, highlighting the need for awareness campaigns and educational programmes aimed at backyard farmers on prevention and biosecurity measures in the management of backyard animals. [ABSTRACT FROM AUTHOR]

Introduction: Chicken is the most commonly consumed animal source food in street restaurants in Burkina Faso. In most of these restaurants, slaughtering, processing, and cooking practices are carried out under poor hygienic conditions. Methods: A cross-sectional survey using a semi-structured interview was carried out to assess food safety knowledge, attitude, and hygienic practices of food handlers in street restaurants selling chicken in Burkina Faso's capital, Ouagadougou. One hundred chicken restaurants were randomly selected, and food handlers were interviewed. Results and discussion: Most restaurants served eat-in and takeaway chicken (66%); the remaining 34% were takeaway only; restaurants served grilled, flamed or roasted chicken. Only 11% of the food handlers had training on food hygiene and safety. Half the outlets were not regularly inspected by the authorities. Less than half (40%) slaughtered their own chickens at the restaurant: of these 85% bled chickens on bare earth. About 80% cleaned the bleeding surface immediately after slaughter with water but only 20% used water with either soap or disinfectant detergent. Eightytwo percent of them used the same cloth during slaughtering and food preparation stages. Many used the same knife in all stages of the slaughtering process. Twothirds kept carcasses unrefrigerated at ambient temperature until cooking started. Around a quarter buried slaughter waste on-site whereas 20% disposed of it on the street near the restaurant. Only 20% had taken steps to improve food safety, and about 80% of food handlers stated that cleanliness and hygiene were not important to their customers when choosing where to eat. Almost half (42%) the food handlers continued to work when they were ill. The poor standards of hygiene observed are typical for street food and small-scale eateries in LMICs in Sub Saharan Africa. An integrated approach is required to improve the situation, including staff training, introduction of food-grade equipment and appropriate technology, behaviorchange approaches, as well as worker and consumer awareness campaigns on good food safety practices. However, significant, sustained improvement in food safety will also require major upgrading of infrastructure and facilities including power and water supply, and cold chain. [ABSTRACT FROM AUTHOR]