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
Ibrahim Polat, Burhan Sen, Fatma Kaynak Onurdag
Summary: In this study, 323 drag swab samples were collected from fresh feces of laying hens in different provinces of Turkey. The samples were tested for Salmonella, and 17.3% were found positive. Serotyping of the 56 Salmonella isolates revealed the presence of 16 different serotypes, some of which were reported for the first time in Turkey and the world. Additionally, susceptibility testing of the isolates showed resistance to certain antibiotics.
Article
Agriculture, Dairy & Animal Science
Chen Yang, Pei Luo, You-tian Yang, Xin-liang Fu, Bing-xin Li, Xu Shen, Dan-ning Xu, Yun-mao Huang, Yun-bo Tian, Wen-jun Liu
Summary: This study revealed that acute heat stress induces mitochondrial damage and increases mitophagy-related protein expression in granulosa cells. By interfering with key proteins in the mitophagy pathway, it was demonstrated that this pathway plays an important role in protecting granulosa cells from heat stress-induced injury.
Article
Agriculture, Dairy & Animal Science
K. Fries-Craft, E. A. Bobeck
Summary: This study evaluated the performance and disease outcomes of broilers fed anti-IL-10 during necrotic enteritis challenge. The results suggest that anti-IL-10 may preserve bird feed efficiency in models without S. Typhimurium.
Article
Agriculture, Dairy & Animal Science
Roel Meyermans, Olivier Heylen, Jessica Bouhuijzen Wenger, Jan Martens, Nadine Buys, Steven Janssens
Summary: Screening for genetic diversity in livestock species breeds is crucial, especially for small populations at risk of extinction. This study used the IMAGE001 genotyping array to evaluate the genetic diversity of the Turkey-headed Malines chicken breed in Belgium. The results showed low genetic diversity in this local breed. This research is the first to use the IMAGE001 array for genotyping a local chicken breed and provides a solid foundation for further evaluation of Belgian chicken heritage.
Article
Agriculture, Dairy & Animal Science
Mengjiao Huang, Xuewei Zheng, Yunjing Zhang, Ruohan Wang, Xiaona Wei
Summary: This study investigated the impact of virulent or avirulent IBV infection on the avian host by analyzing the protein expression in chicken kidneys. The results showed distinct expression profiles between different IBV strains, with the IFN-I signaling pathway emerging as a critical response to IBV infection.
Article
Agriculture, Dairy & Animal Science
A. Rybicka, R. del Pozo, D. Carro, J. Garcia
Summary: This study investigated the effects of insoluble fiber (IF) sources with different particle sizes and hydration capacities on broiler growth performance and gastrointestinal tract development. The results showed that IF sources with high hydration capacity negatively affected feed conversion ratio, feed intake, and weight gain, while IF sources with low hydration capacity positively influenced digestive system development.
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
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
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
Ying Guo, Carl-Johan Rubin, Tilman Ronneburg, Shouzhi Wang, Hui Li, Xiaoxiang Hu, Orjan Carlborg
Summary: We compared the genomes of domestic chicken breeds with different earlobe colors and identified differentiated regions on chromosome 11. We found a significant selective sweep in white earlobe chicken breeds from the Mediterranean, where multiple candidate genes, including the Melanocor-tin 1 Receptor (MC1R), are located. MC1R is known to regulate pigmentation in the skin and hair and shows strong positional support from haplotype-based analyses. Further experimental exploration is needed to confirm its effects on chicken earlobe color variation. This study is the first to use whole-genome sequencing data and a selective sweep mapping method to explore the genetic basis of white earlobe color in Mediterranean chickens, demonstrating its value in identifying functional genes and suggesting a potential novel role of MC1R in birds. Selection for fancy traits has influenced the chicken genome during the formation of modern breeds.
Article
Agriculture, Dairy & Animal Science
Kai-Zhi Zhou, Peng-Fei Wu, Xuan-Ze Ling, Jin Zhang, Qi-Fan Wang, Xin-Chao Zhang, Qian Xue, Tao Zhang, Wei Han, Gen-Xi Zhang
Summary: This study demonstrated that miR-460b-5p positively regulates the proliferation and differentiation of chicken myoblasts and that RBM19 is a target gene of miR-460b-5p. These findings are important for understanding the regulatory mechanism of meat development in broilers.
Article
Agriculture, Dairy & Animal Science
Jung Yeol Sung, Brittney J. Emmert, Darrin M. Karcher, Carrie L. Walk, Olayiwola Adeola
Summary: This study aimed to evaluate the effect of monosodium phosphate (MSP) and exogenous phytase on growth performance, ileal P digestibility, and bone characteristics in broiler chickens. The results showed that supplementation of MSP or exogenous phytase improved growth performance, ileal P digestibility, bone breaking strength, and bone ash in young broiler chickens.
Article
Agriculture, Dairy & Animal Science
Sonia Metayer Coustard, Christelle Rossignol, Anne Collin, Fany Blanc, Nathalie Lallier, Catherine Schouler, Elisabeth Le Bihan Duval, Angelique Travel, Anne-Christine Lalmanach
Summary: Poultry production is a crucial sector for human food and the health problems faced by chicks can lead to economic losses for breeders. This study suggests that Avian defensin 2 (AvBD2) could serve as a marker of innate immunity and robustness in poultry. The analysis of AvBD2 content in the cecum of fast-growing and slow-growing lines revealed individual variability and an inverse correlation with seric IgM levels in the fast-growing line.
Article
Agriculture, Dairy & Animal Science
Lieske van Eck, Adele Schouten, Syrena Powell, David Lamot, Henk Enting, Rene Kwakkel
Summary: Understanding the effect of nutrition on pullet growth curves and body composition can help in designing feeding strategies that influence body composition and long-term laying performance. This study found that increased diet density leads to linear increase in body weight during the peak production phase. However, diet density does not affect egg production parameters. It was also observed that diet density influences the deposition of crude fat and abdominal fat pad percentages, but not the deposition rates of crude protein and body dry matter.
Article
Agriculture, Dairy & Animal Science
Cristiano Bortoluzzi, Leticia C. Bittencourt, Estefania Perez-Calvo, Bruna L. Belote, Igor Soares, Elizabeth Santin, Jose Otavio Berti Sorbara, Luiz F. Caron
Summary: The present studies aimed to evaluate the supplementation of muramidase (MUR) in broilers under Eimeria and/or Clostridium perfrin-gens challenge. Two experiments were conducted to evaluate this. In Experiment 1, 256 one-day old male Cobb 500 chicks were used in a completely randomized design, with 5 treatment groups and 7 replicate cages per treatment. In Experiment 2, 1,120 one-day old male Cobb 500 chicks were placed in floor pens.
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
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.
