Surveys were conducted with cage and alternative layer production systems to assess the prevalence of fatty liver haemorrhagic syndrome (FLHS). Commercial caged laying hens of different ages from ...three farms in Queensland were monitored for three months. The mortality rate of flocks ranged from 0.8% (the youngest flock) to 11.6% (the oldest flock). Six hundred and fifty-one birds were necropsied, and approximately 40% of hens died due to FLHS. Hens kept in cages in a controlled environment shed, were at a similar risk of developing FLHS to hens kept in naturally controlled sheds, however, the heavier birds in a flock were more likely to have the condition than lighter birds. In another study, layer flocks kept in cage, barn and free-range housing systems at the University of Queensland facility, were monitored for 50 weeks. Data from necropsies and performance records showed no significant differences in mortality rates between the housing systems (6.1%, 6.4% and 5.8%, for cages, barns and free-range, respectively), but the cause of mortality was different. In cages, 74% of necropsied hens died due to FLHS. In the other systems, only 0-5% of dead hens were diagnosed with the condition. These results are in agreement with previous Australian and overseas findings which have shown that FLHS is one of the main causes of hen death in caged flocks. Factors associated with husbandry practices in different production systems, such as restricted movement, increased production and temperature variations, influence hepatic lipid metabolism and predispose hens to FLHS.
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BFBNIB, DOBA, GIS, IJS, IZUM, KILJ, KISLJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Abstract
The laying hens are prone to get sick during the growing period, and the temperature will fluctuate within a relative range when the disease occurs. This temperature change range can be used ...as a sign of pathological phenomena in the laying hens. In order to find the floating range of the body surface temperature of the laying hens raised in the poultry house in both healthy and pathological states, and the areas where there is a significant difference in the body surface temperature of the two, a detection method combining infrared thermal imaging technology and neural network is proposed. First, use an infrared thermal imager to obtain an infrared image of the body surface of a layer, and then use a convolutional neural network to establish a recognition model for the characteristic area of the layer, and extract the highest temperature of the region of interest in a healthy and pathological layer. Finally, analyse the temperature difference of each area of interest in the chicken body under these two conditions. The test results show that the accuracy of the convolutional neural network recognition model is 97%; the temperature fluctuation range of the three characteristic areas of healthy and pathological layers are different, and the maximum temperature difference area is 7.8°C.
The restriction on the use of antibiotics as a growth promotant in poultry diets, due to their adverse effects, has led to increased use of feed additives with natural ingredients such as medicinal ...plants and herbs. Pepper (Capsicum sp) is a potential feed additive as an antibiotic alternative in laying hen diet. This meta-analysis aimed to determine the effect of pepper supplementation on the performance and egg quality attributes of laying hens. The PubMed, Scopus, Google Scholar, and Science Direct databases were searched for peer-reviewed randomized controlled trials written in English. Information on the moderators (hen age at the beginning of the intervention, pepper preparation form, inclusion level of pepper, and treatment duration) were required for inclusion in the meta-analysis, as well an acceptable explanation of randomization, statistical analysis of egg production and quality, and associated variance measurements, such as standard deviation or standard error. The meta-analysis included 19 research papers that met the criteria. Open meta-analyst for ecology and evolution (OpenMEE) software was used for all analyses. The pooled results demonstrated that supplementing with pepper reduced feed intake by −0.44 g/day, increased HDEP by 0.71% and egg yolk color by 5.7 but had no effect on FCR or egg weight compared to the control, after considering publication bias and heterogeneity. Hens provided diets with or without peppers had comparable HDEP. This meta-analysis indicates that pepper can be used as a feed additive in laying hens to increase egg production and egg yolk color.
The current study aimed to explore the pharmacokinetics of danofloxacin in non‐laying hens after a single oral (PO) and intravenous (IV) dose, both at 5 mg/kg body weight (BW). Eighteen 13‐week‐old ...healthy hens were equally and randomly divided into two groups. After both doses, blood samples (approximately 1 ml) were collected at different time points. Danofloxacin concentrations were quantified by a validated high‐performance liquid chromatography (HPLC) method followed by a non‐compartmental analysis using the software of WinNonLin. The elimination half‐lives (t1/2λzs) after PO and IV routes were determined as 8.15 ± 3.37 and 7.69 ± 3.40 h, respectively. After IV administration, danofloxacin had an initial concentration (C0) of 3.62 μg/ml, a volume of distribution at steady state (VSS) of 3579.72 ± 454.29 ml/kg, and a total body clearance (Cl) of 0.49 ml/h/g. After PO administration, the absolute bioavailability and absorption half‐life (t1/2ka) were calculated as 100.99% ± 23.10% and 0.82 ± 0.58 h, respectively. Based on the calculated ratio values of AUC/MIC and Cmax/MIC, an oral dose of 5 mg/kg danofloxacin would be expected to successfully treat hens infected with strains with MIC values ≤0.1 μg/ml.
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BFBNIB, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SBCE, SBMB, UL, UM, UPUK
The purpose of these studies was to analyse and compare the content of bromine in samples of chicken eggs, feed, and water from different regions of Ukraine in the dynamics of 2016 – 2020: with an ...increased risk of bromine in products (Kharkiv, Poltava, Dnipropetrovsk and Mykolaiv regions) and outside the risk zone (Volyn, Vinnytsia and Zaporizhzhia). Studies of bromine content in eggs, feed, and water were performed in the laboratory of toxicological monitoring of the National Scientific Center "Institute of Experimental and Clinical Veterinary Medicine" (Kharkiv) using X-ray fluorescence analysis. As a result of the conducted researches, the increase of the bromine content in chicken eggs in the dynamics of 2016 – 2020 was established: the bromine content increased regardless of the region of the poultry farm location. The highest bromine concentration in chicken eggs was found in Kharkiv, Dnipropetrovsk, Mykolaiv, and Zaporizhia regions. Bromine source in poultry products is the excessive intake of bromine in the poultry body with alimentary environmental factors (feed and water). Bromine content in feed for chickens increased in the research dynamics (from 35.1% in the Poltava region to 2.5 times in the Zaporizhzhia region). It exceeded the established EFSA (4.4% of the total) and the average in Ukraine (51.2% of the total number of samples). In addition, the average bromine content in feed from poultry farms of the studied regions of Ukraine correlated with the number of registered and approved bromine-containing pesticides. The average bromine concentration in water sources in the studied regions of Ukraine had no significant differences compared to the beginning of the study but exceeded the maximum allowable concentration by 21.7% in 2016, 34.8% in 2018 and 39.1% in 2020. The maximum bromine concentration was in water sources in Mykolayiv, Kharkiv, and Dnipropetrovsk regions.
Micro/nanoplastics (MP) are emerging environmental contaminants of great concern because of their ubiquitous distribution in air, soil, water, and food. Reports have described MP in the excreta of ...food animals, but their absorption, distribution, and elimination in terrestrial animals used for human consumption is essentially unexplored. To determine the absorption and distribution of 14C-polystyrene (PS) MP, laying hens (n = 15) were bolus dosed with 10 μCi/hen (11.1 ± 0.8 mg/kg) and the extent of radioactivity in blood and tissues was determined in birds harvested on withdrawal days (WD) 1, 2, 3, 4, and 7 (3 hens per WD). Radiocarbon was also determined in egg fractions and excreta collected throughout the study. Blood, eggs, and tissues contained a total of <1 % of the administered dose, demonstrating that polystyrene microparticles were poorly absorbed. Recovery of radioactivity in excreta within the first withdrawal day was nearly quantitative (96.8 ± 14.5 %, n = 15), suggesting exposure of poultry to dietary PS-MP would not likely represent subsequent food safety risks and that most PS-MP present in poultry diets would return to the environment.
Display omitted
•14C-polystyrene microplastics (MP) were poorly absorbed in dosed laying hens.•Radioactivity partitioned between the yolk and white in a time dependent ratio.•The majority of the administered 14C-polystyrene MP was eliminated in excreta.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
The purpose of the current meta-analysis was to determine the efficacy of
spp. (BS) feed additive in enhancing serum biochemical indices (total protein and cholesterol) and antioxidant enzymes (total ...antioxidant capacity TAC, catalase CAT, superoxide dismutase SOD, glutathione peroxidase GSH-Px, and malondialdehyde MDA) status and egg quality (Haugh unit HU, eggshell thickness EST, and eggshell strength ESS) of laying chickens. Seventeen articles were identified via a systematic search performed on PubMed, Google Scholar, and Scopus, and results were combined using a variance component model. The results indicate that dietary BS supplementation resulted in higher HU (
< 0.001), EST (
< 0.001), and ESS (
< 0.001) values with evidence of heterogeneity. Furthermore, dietary BS increased total protein (
= 0.008) and GSH-Px (
< 0.001) and reduced the concentrations of CAT (
= 0.018), SOD (
= 0.039) and MDA (
< 0.001) in the serum of laying hens. In contrast, dietary BS did not affect serum cholesterol and TAC in laying chickens. Restricted subgroup analyses showed that the studied moderators (i.e., treatment duration, supplementation level, BS, hen’s age, and hen’s strains) influenced the outcomes of the meta-analysis. Additionally, meta-regression revealed that the studied moderators accounted for most of the sources of variations among the 17 studies utilised for the meta-analysis. In conclusion, dietary BS can be utilised as a nutritional strategy to improve egg quality, serum total proteins, and the serum antioxidant status of laying hens.
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1. In many countries, eggs are not refrigerated and must be stored at room temperature. The objective of this study was to explore the effects of dietary oregano oil (275 mg
$/$
/
kg; ORE) versus ...an unsupplemented control diet (CON) on laying hens on the shelf life and fatty acid profile of eggs.
2. Treatments were randomly distributed into 10 pens containing 27 birds each. A total of 200 eggs were collected from both groups on the same day and were stored for either 0, 10, 21 and 35 d. At each storage time, egg yolks were analysed for fatty acid profile and lipid peroxidation.
3. The main indicator of lipid peroxidation, malondialdehyde (MDA), was significantly lower in ORE eggs compared to CON eggs (p = 0.001). Storage time had a significant impact on MDA concentrations (p = 0.023), with the highest found after 35 d. Significant differences were found for individual fatty acids, saturated (SFA), monounsaturated (MUFA) and polyunsaturated fatty acids (PUFA). Palmitic acid, stearic acid, oleic acid, linoleic acid and arachidonic acid were significantly lower in ORE eggs compared to CON eggs (p < 0.05). Palmitoleic acid (p = 0.002), linolenic acid (p = 0.001) and docosahexaenoic acid (DHA, p = 0.001) were significantly higher in ORE eggs.
4. Storage only affected oleic, linolenic, linoleic, arachidonic and docosahexaenoic acids (p < 0.05). Total SFA, MUFA, n-6 and ratio of n-3 to n-6 (n-3:n-6) PUFA were significantly higher in CON eggs (p < 0.05). The ratio of SFA to PUFA (SFA:PUFA, p = 0.005) and total n-3 PUFA (p = 0.001) were significantly higher in ORE eggs.
5. The n-3:n-6 ratio was significantly impacted by treatment (p = 0.021) and storage (p = 0.031) with no significant interaction. This ratio is important for human health indication and could lead to the development of designer eggs.
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BFBNIB, GIS, IJS, KISLJ, NUK, PNG, UL, UM, UPUK
Abstract Sorong Regency is the food barn of Sorong Raya, which includes Sorong Regency, South Sorong Regency, Sorong City, Maybrat Regency, Tambrauw Regency, and Raja Ampat Regency. The egg ...production of Sorong Regency is used to meet the needs of Sorong Regency as well as the Greater Sorong area, including Sorong City, South Sorong Regency, and Raja Ampat Regency. This study aims to analyze the production or performance of laying hens and evaluate the quality of eggs laid by hens in Sorong Regency. The method used in this research is the descriptive method, involving data collection techniques based on direct observation in the field, interviews with farmers, laboratory testing, and observation. Eight farmers were interviewed, and egg samples were taken to be tested for their quality. The average number of eggs taken from each farmer was 30 eggs per week, totaling between 117 and 120 eggs. The variables observed included 1) Performance, which involved feed consumption, feed conversion, and depletion. 2) Hen Day Production (HDP), and 3) Egg quality. The collected data were processed and presented in tables to determine the total and average values. Correlation tests were applied to examine the relationship between hen age and egg production, external egg quality, which includes egg weight, egg shape index, shell weight, shell thickness, and internal egg quality, including yolk color and Haugh unit. The study results revealed that 1) Hen Day Production of laying hens in Sorong Regency is still below the normal standard of daily egg production for ISA Brown laying hens. 2) On average, feed consumption and total depletion of laying hens in Sorong Regency are within the standard range, but the feed conversion value is still high and has not met the standard feed conversion value for ISA Brown laying hens. 3) Based on data on egg weight, IBT, shell weight, and shell thickness, the external egg quality of laying hens in Sorong Regency, according to BSN (3926: 2008), falls into the Medium category. Meanwhile, based on data on Air Cavity Depth, Yolk Color, and Haugh Unit, the internal quality of eggs from laying hens in Sorong Regency, according to BSN (3926: 2008), falls into Quality I. Keywords: Egg production; Egg quality; ISA Brown laying hens; Sorong Regency, Abstrak Kabupaten Sorong merupakan lumbung pangan Sorong Raya yang meliputi Kabupaten Sorong, Kabupaten Sorong Selatan, Kota Sorong, Kabupaten Maybrat, Kabupaten Tambrauw dan Kabupaten Raja Ampat. Produksi telur ayam ras Kabupaten Sorong digunakan untuk menyuplai kebutuhan Kabupaten Sorong serta kebutuhan daerah Sorong Raya antara lain Kota Sorong, Kabupaten Sorong Selatan, dan Kabupaten Raja Ampat. Penelitian ini bertujuan untuk menganalisis produksi atau performa ayam ras petelur serta menganalisis kualitas telur ayam ras petelur di Kabupaten Sorong. Metode yang digunakan dalam penelitian ini metode deskriptif dengan teknik pengumpulan data berdasarkan observasi langsung di lapangan dan wawancara dengan peternak serta pengujian dan pengamatan di laboratorium. Delapan orang peternak diwawancara dan ambil sampel telur untuk diuji kualitas telur. Jumlah telur yang diambil rata-rata 30 butir/minggu dari peternak, sehingga total telur yang diambil dari masing-masing peternak berkisar 117-120 butir. Variabel yang diamati 1) Performa meliputi konsumsi pakan, konversi pakan dan deplesi. 2) Hen Day Production (HDP) dan 3) Kualitas telur. Data yang diperoleh diolah dan ditampilkan dalam tabel untuk kemudian dicari jumlah dan rata-rata nilai. Uji korelasi diberlakukan untuk melihat korelasi antara umur ayam dengan produksi telur, kualitas telur ekternal yang meliputi; berat telur, indeks bentuk telur, berat kerabang, ketebalan kerabang, dan kualitas telur internal yang meliputi: warna kuning telur dan Haugh unit. Hasil penelitian diperoleh 1) Produksi telur harian (Hen Day Production) ayam ras petelur di Kabupaten Sorong masih dibawah standar normal produksi telur harian ayam petelur ISA Brown, 2) Secara rataan konsumsi pakan dan total deplesi ayam ras petelur di Kabupaten Sorong masih sesuai dengan standar konsumsi pakan dan total deplesi ayam ras petelur, namun nilai konversi pakan masih tinggi atau belum memenuhi standar nilai konversi pakan ayam petelur ISA Brown dan 3) Menilik data Berat telur, IBT, berat dan tebal kerabang, maka kualitas telur eksternal ayam ras petelur Kabupaten Sorong berdasar BSN (3926:2008) termasuk pada kategori Sedang, sedangkan berdasarkan data Kedalaman Rongga Udara, Warna Kuning Telur dan Haugh Unit maka kualitas internal telur ayam ras Petelur Kabupaten Sorong berdasarkan BSN (3926:2008) termasuk dalam Mutu I. Kata Kunci: Ayam petelur ISA Brown; Kabupate Sorong; Kualitas Telur; Produksi telur,
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