Article
Agriculture, Dairy & Animal Science
C. P. Juzaitis-Boelter, A. P. Benson, M. U. Ahammad, M. K. Jones, J. Ferrel, A. J. Davis
Summary: The inclusion of dietary AZOMITE in poultry diets improves bird performance, including feed efficiency, immune function, and growth promotion. Additionally, it enhances the digestion and absorption of calcium and phosphorus in birds, as well as the mineral content in bones.
Article
Physiology
Emily Van Syoc, Evelyn Weaver, Connie J. Rogers, Justin D. Silverman, Ramesh Ramachandran, Erika Ganda
Summary: Studies suggest that dietary supplementation of metformin affects the gut microbiome of broiler breeder hens in a dose-dependent manner, with results consistent with the effects of metformin treatment in type 2 diabetes and polycystic ovary syndrome in humans. Metformin supplementation shows promise in improving gut health and reproductive efficiency in broiler breeder hens.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Agriculture, Dairy & Animal Science
M. Q. Nascimento, R. M. Gous, M. P. Reis, G. S. Viana, B. R. F. Nogueira, NK. Sakomura
Summary: Broiler breeders are often subjected to feed restrictions to prevent obesity, which can lead to health and welfare issues. Diluting their feed with inert or low-nutrient materials may reduce obesity, but the gut capacity needs to be considered for successful implementation. Water-holding capacity was found to be the most appropriate measure to define the gut capacity of broiler breeders.
BRITISH POULTRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
Pao-Chia Chou, Pei-Chi Lin, Shu-Wei Wu, Chien-Kai Wang, Thau-Kiong Chung, Rosemary L. Walzem, Lih-Shiuh Lai, Shuen-Ei Chen
Summary: The study found that ad-libitum feed intake suppressed IL-1 beta secretion, respiratory burst, and cell livability in white blood cells, while supplemental 25-OH-D-3 had more pronounced effects on innate immunity. In vitro studies confirmed the differential effects of 25-OH-D-3 on rescuing immune functions altered by glucose and/or palmitic acid exposure.
Article
Agriculture, Dairy & Animal Science
Feng Li, Yingjie Xie, Xue Yang, Yuanyuan Zhang, Baojing Cheng, Anshan Shan
Summary: Maternal nutrition affects offspring meat quality, with feed restriction leading to reduced lean meat and increased fat content in the offspring. The impact of maternal nutritional disturbance varies between different genetic lines.
Article
Agriculture, Dairy & Animal Science
Thiago L. Noetzold, Sergio L. Vieira, Raquel M. Horn, Camila R. de Freitas, Alba K. Fireman
Summary: The study evaluated the effects of partial substitution of inorganic trace minerals by amino acid complexed minerals on broiler breeder hens' performance and offspring. The results showed that partial substitution led to improved body weight gain and feed conversion ratio in the offspring.
JOURNAL OF APPLIED POULTRY RESEARCH
(2022)
Article
Agriculture, Dairy & Animal Science
Karol Wlodarczyk, Dariusz Kokoszynski, Mohamed Saleh, Dariusz Piwczynski
Summary: The aim of the study was to compare the carcass features and digestive system of dual-purpose hens and broiler breeders. The results showed significant differences in carcass weight and dimensions between the two groups. Duel-purpose hens had lower percentages of certain muscles and skin, while broiler breeders had longer intestines and greater mass of internal organs.
Article
Developmental Biology
Evelyn A. Weaver, Ramesh Ramachandran
Summary: Broiler breeder hens with poor reproductive efficiency were treated with different doses of metformin to study its effects on body weight, abdominal fat pad weight, ovarian function, and plasma hormone concentrations. The results showed that the highest dose of metformin significantly reduced body and abdominal fat pad weights, normalized ovarian follicular hierarchy, and improved egg production, fertility, and hatchability. Metformin treatment also altered the plasma profile of reproductive hormones. Further research is needed to understand the mechanisms behind these beneficial effects.
Article
Agriculture, Dairy & Animal Science
F. Li, H. Ning, X. Duan, Z. Chen, L. Xu
Summary: The study found that the level of arginine in maternal diet significantly affects egg weight, organ index, and embryo weight. The arginine level in maternal diet during the embryonic period also influences physiological indicators and immune function in the embryo.
DOMESTIC ANIMAL ENDOCRINOLOGY
(2021)
Article
Biology
Mingkun Gao, Jiao Wang, Zengpeng Lv
Summary: This study found that genistein supplementation in breeder hens improved the intestinal health of their offspring. The chicks showed increased birth weight, improved intestinal villus morphology, and elevated serum protein levels. Maternal genistein also protected against damage and dysfunction in the intestines by upregulating tight junction proteins.
Article
Agriculture, Multidisciplinary
Yongfa Liu, Simeng Li, Zhenwu Huang, Hongjian Dai, Fangxiong Shi, Zengpeng Lv
Summary: The study investigated the effects of collagen peptide-chelated trace elements (PTE; Zn, Fe, Mn) on the intestinal growth and barrier function of chicken offspring. The results showed that maternal PTE supplementation improved intestinal morphology, gene expression, and microbial diversity. Furthermore, PTE treatment enhanced the intestinal barrier function and reduced inflammation in the offspring. Therefore, maternal PTE supplementation can promote intestinal development and enhance the intestinal barrier function of chicken offspring.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2023)
Article
Agriculture, Dairy & Animal Science
Laurie Francoeur, Claire S. Stephens, Patricia A. Johnson
Summary: Intense selective breeding of broiler breeds of chickens has led to decreased egg production in broiler breeder hens, and limiting feed intake can improve egg production but may impact reproductive efficiency.
Article
Veterinary Sciences
Alassane Keita, Laetitia Le Devendec, Michel Amelot, Julie Puterflam, Camille Lucas, Stephanie Bougeard, Sabine Delannoy, Catherine Schouler, Patrick Fach, Pierrick Lucas, Rozenn Souillard, Isabelle Kempf
Summary: This study investigated the pathogenicity of three APEC strains in day-old chicks and developed an autogenous vaccine that showed partial protection against one of the highly virulent strains in challenge trials.
Article
Agriculture, Dairy & Animal Science
Veronica Cortes, Sandra Sevilla-Navarro, Cristina Garcia, Clara Marin, Pablo Catala-Gregori
Summary: This study assessed the seroprevalence, prevalence, and variants of Infectious Bronchitis Virus (IBV) in broilers, layers, and broiler breeders farms in Eastern Spain. The results showed the presence of IBV in the region and the changing prevalence of IBV variants, which varied according to the productive orientation. Continuous monitoring of IBV is important for optimizing vaccination strategies.
Article
Agriculture, Dairy & Animal Science
Jihao You, Edmond Lou, Mohammad Afrouziyeh, Nicole M. Zukiwsky, Martin J. Zuidhof
Summary: Using artificial intelligence technology, the probability of daily oviposition events for broiler breeders can be predicted, helping guide feeding and disease treatments.
Article
Agriculture, Dairy & Animal Science
Jesper Tessin, Judith Rohde, Arne Jung, Nicole Kemper, Jochen Schulz
Summary: In this study, samples from poultry house environment and culled birds were collected, and E. cecorum was successfully isolated. The principle of isolating the pathogen by streaking on a chromogenic agar may motivate researchers to investigate transmission routes and optimize biosecurity measures.
Article
Agriculture, Dairy & Animal Science
Junqin Zhang, Zimin Xie, Yanlin Pan, Zuoxin Chen, Yunzhen Huang, Linlin Li, Jiawen Dong, Yong Xiang, Qi Zhai, Minhua Sun, Xingying Li, Shujian Huang, Ming Liao
Summary: In recent years, there has been an increase in the occurrence of fowl adenovirus 2 (FAdV-2) in China, posing a significant threat to the poultry industry. This study investigated the epidemiology, phylogenetic relationship, genomic characteristics, and pathogenicity of FAdV-2. The results showed that FAdV-2 was the most commonly detected serotype among various FAdV serotypes. Genetic analysis revealed that these FAdV-2 strains formed a distinct branch within the FAdV-D group and had a high nucleotide similarity with reference strains. Recombination analysis identified recombination events between FAdV-2 and FAdV-11 in some strains. Pathogenicity experiments demonstrated that a recombinant FAdV-2 strain caused a high mortality rate and more severe disease in chickens. These findings contribute to our understanding of FAdV-2 and provide a basis for vaccine development.
Article
Agriculture, Dairy & Animal Science
Ebtsam Iraqi, Ali Abdel Hady, Nadia Elsayed, Hanaa Khalil, Amina El-Saadany, Karim El-Sabrout
Summary: Thermal manipulation during egg incubation, particularly at 12 to 18 days, has positive effects on embryonic development, hatching characteristics, chick quality, as well as posthatch thermotolerance and performance.
Article
Agriculture, Dairy & Animal Science
Yong Liu, Mingxin Song, He Bai, Chunhua Wang, Fei Wang, Qi Yuan
Summary: Dietary curcumin supplementation can significantly improve egg quality of quails in the late laying period, primarily by improving lipid metabolism and selectively regulating the intestinal microbial community.
Article
Agriculture, Dairy & Animal Science
Lei Zhang, Zhixuan Song, Peiyao Li, Xingju Song, Xinming Tang, Dandan Hu
Summary: This study evaluated the vaccine potential of recombinant proteins for avian coccidiosis caused by Eimeria. The results showed that the rEten5-B protein can trigger immune protection against E. tenella and may be a potential and effective subunit vaccine for the control of coccidiosis in poultry.
Article
Agriculture, Dairy & Animal Science
Milan Kumar Sharma, Amit Kumar Singh, Doyun Goo, Venkata Sesha Reddy Choppa, Hanseo Ko, Hanyi Shi, Woo Kyun Kim
Summary: The study investigates the effect of Eimeria infection on gastrointestinal physiology, growth performance, and egg production of Hy-Line W-36 laying hens during peak production. Results show that Eimeria infection negatively affects body weight, feed intake, immune response, and nutrient transporter gene expression. Egg production temporarily ceases in hens infected with high and medium-high dosages of Eimeria.
Article
Agriculture, Dairy & Animal Science
Elwy A. Ashour, Mahmoud Kamal, Hayman A. A. Altaie, Ayman A. Swelum, Gamaleldin M. Suliman, Guillermo Tellez-Isaias, Mohamed E. Abd El-Hack
Summary: This study evaluated the effects of CP and ME on the performance and nutritional value of Japanese quail lay chicken. The results showed that protein and energy levels significantly influenced all productive outcomes except feed conversion ratio. The combination of dietary energy and protein levels had a substantial effect on all egg quality trials evaluated. It is recommended to feed layer Japanese quail between the ages of 8 and 20 weeks during the summer with a dietary energy content of 2,900 kcal ME/kg and 20% CP.
Article
Agriculture, Dairy & Animal Science
J. E. Doornweerd, R. F. Veerkamp, B. de Klerk, M. van der Sluis, A. C. Bouwman, E. D. Ellen, G. Kootstra
Summary: Tracking group-housed individual broilers using video can provide valuable information on their health, welfare, and performance. This study conducted a comprehensive analysis on broiler tracking on video and potential tracking errors, highlighting the potential and challenges of phenotyping broiler locomotion. The results emphasized the importance of addressing tracking errors, potential algorithm improvements, and the need for an external animal identification system for efficient locomotion phenotyping.
Article
Agriculture, Dairy & Animal Science
Jiayu Wu, Yanan Wang, Yu An, Changyu Tian, Lingfeng Wang, Zuhong Liu, Desheng Qi
Summary: This study compared the gene expression differences in liver tissues of laying hens at different ages using RNA sequencing, and found that the transport and metabolism of amino acids changed during the growing period, which influenced the growth and development of the hens.
Article
Agriculture, Dairy & Animal Science
J. Raabe, G. Raveendran, W. Otten, K. Homeyer, T. Bartels
Summary: This study investigated the effects of different flicker frequencies on the behavior, performance, and stress response in male turkeys. The results showed that flicker frequencies of 165 Hz or higher had no detrimental effect on growth performance, injurious pecking, or endocrine stress response in the turkeys.
Article
Agriculture, Dairy & Animal Science
Adamu Mani Isa, Yanyan Sun, Yuanmei Wang, Yunlei Li, Jingwei Yuan, Aixin Ni, Hui Ma, Lei Shi, Hailai Hagos Tesfay, Yunhe Zong, Panlin Wang, Pingzhuang Ge, Jilan Chen
Summary: This study sequenced mRNAs and lncRNAs in the ovary stroma of specific chicken breeds and their reciprocal crossbreds to understand the molecular mechanism of heterosis for egg production. Results showed that genes with nonadditive expression were related to follicle growth and atresia as well as oxidative stress in the crossbred hens.
Article
Agriculture, Dairy & Animal Science
Zhepeng Wang, Qiu Chen, Yiwei Wang, Yulu Wang, Ruifang Liu
Summary: The study investigates the functional variants associated with chicken eggshell color in the SLCO1B3 gene by measuring the eggshell color of Lueyang black-boned chickens and analyzing the genetic data. It identifies 15 variants in SLCO1B3 that are significantly associated with eggshell color. However, the functional analysis shows that one specific variant, 1B3_SNP108, does not have a significant effect on promoter activity. This study highlights the importance of SLCO1B3 and its variants in breeding eggshell color.
Article
Agriculture, Dairy & Animal Science
P. Yin, Q. Tong, B. M. Li, W. C. Zheng, Y. Wang, H. Q. Peng, X. L. Xue, S. Q. Wei
Summary: This study investigated the welfare and health of laying hens in a multitier system. The results showed that the spatial distribution of hens changed with increasing age, and lower-ranking hens preferred to stay in lower tiers to avoid competition but still had access to resources. This improved the welfare and health of the hens near the end of the laying cycle.
Article
Agriculture, Dairy & Animal Science
Wenwen Liang, Siqiong Jie, Yiqin Wang, Xiaowei Wen, Yanling Xiong, Xiaoxi Lin, Zhengrong Lv
Summary: This study examined the effect of risk perceptions on preventive behavior among vendors in the live poultry wholesale market and the live poultry retail market in Guangdong Province using the health belief model and structural equation modeling. The results showed that perceived severity and perceived benefits positively influenced vendors' self-efficacy in the wholesale market, while perceived barriers negatively affected self-efficacy in both the wholesale and retail markets. Moreover, cues to action mediated the relationship between perceived severity, perceived benefits, and self-efficacy, and also mediated the effect of perceived susceptibility among wholesale market vendors.
Article
Agriculture, Dairy & Animal Science
Shreeya Sharma, Raveendra R. Kulkarni, Shayan Sharif, Hosni Hassan, Mohammadali Alizadeh, Scott Pratt, Khaled Abdelaziz
Summary: The study investigates the impact of exposing chick embryos to antigens via in ovo delivery of poultry-specific lactobacilli on the expression of genes associated with early bursal development and maturation. Results indicate that the supplementation of poultry-specific lactobacilli to chick embryos can accelerate the development and immunological maturation of the bursa of Fabricius.