Article
Microbiology
Guoqing Zhang, Ning Yang, Zhongyuan Liu, Xinyu Chen, Mengjiao Li, Tongyu Fu, Donghong Zhang, Cuiqing Zhao
Summary: This comprehensive study focused on the genetic analysis of Lactiplantibacillus plantarum 18 (LP18) to understand its survival and colonization characteristics in the gastrointestinal tract. Supplementing LP18 in the diet of laying hens resulted in significant improvements in growth performance, egg quality, and lipid metabolism. The study revealed specific genes associated with adaptability, adhesion, and gastrointestinal safety in LP18. These findings highlight the potential of LP18 as a probiotic candidate to enhance productivity, optimize egg quality, and modulate lipid metabolism in poultry production.
Article
Agriculture, Dairy & Animal Science
Shuo Liu, Jiaxin Hu, Linfei Li, Sicheng Xing, Yiwen Yang, Xindi Liao
Summary: This study found that sodium butyrate can significantly reduce ammonia (NH3) emissions from the cecal microbial fermentation of Lohmann pink laying hens. Sodium butyrate can also regulate the abundance of harmful and beneficial bacteria in the cecum. Culturing experiments showed that sodium butyrate can reduce NH3 emission from bacteria metabolism.
Article
Agriculture, Dairy & Animal Science
Jing Lv, Lijuan Guo, Bingxu Chen, Keyang Hao, Hui Ma, Yinglu Liu, Yuna Min
Summary: This study aimed to investigate the effects of different probiotic fermented diets on production performance and intestinal health of laying hens. The results showed that feeding Lactobacillus salivarius and Lactobacillus crispatus fermented feed improved feed conversion ratio, albumen height, and Haugh unit of laying hens. Furthermore, Lactobacillus salivarius fermented feed supplementation improved villus height, crypt depth, and microbial composition, enhancing intestinal health.
Article
Microbiology
Hengyong Xu, Yuxiang Lu, Dan Li, Chaoyang Yan, Yuru Jiang, Zhi Hu, Zhipeng Zhang, Ranran Du, Xiaoling Zhao, Yao Zhang, Yaofu Tian, Qing Zhu, Yiping Liu, Yan Wang
Summary: This study investigated the effects of dietary probiotics supplementation on laying performance, egg quality, serum hormone levels, immunity, antioxidant, and gut microbiota of layers at different laying stages. The results showed that the addition of probiotics improved egg weight, egg quality, ovarian development, hormone levels, antioxidant indices, and decreased proinflammatory factors. Probiotics also influenced the distribution and abundance of different bacterial phyla in the gut microbiota of laying hens at different laying stages. Furthermore, probiotics supplementation enriched important gene clusters related to metabolism, genetic information processing, and decreased the proportion of potential pathogenic bacteria. Overall, adding probiotics enhanced the performance, egg quality, immune function, and gut microbiota of layers, leading to improved production efficiency.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Agricultural Engineering
Eduardo Rosa, Julio Mosquera, Haritz Arriaga, Gema Montalvo, Pilar Merino
Summary: The study aimed to model NH3 emission by relating climate and production management parameters, and evaluate the accuracy of reduced sampling strategies in estimating NH3 emission. Outdoor temperature was found to be the main factor affecting NH3 emission, and reducing sampling frequency increased estimation error.
BIOSYSTEMS ENGINEERING
(2021)
Article
Agriculture, Dairy & Animal Science
Miao Li, Kunxian Feng, Jingyi Chen, Tianxu Liu, Yinbao Wu, Jiandui Mi, Yan Wang
Summary: This study aimed to identify Chinese herbal extracts with ammonia emission reduction effects using an in vitro gas production study. Astragalus extract significantly reduced ammonia production by changing the gut microbial community structure, decreasing ammonia-producing bacteria, and reducing uricase and urease activities.
Article
Environmental Sciences
Zhikang Zhong, Chao Wang, Huaidan Zhang, Jiandui Mi, Juan Boo Liang, Xindi Liao, Yinbao Wu, Yan Wang
Summary: This study investigates the effect of sodium butyrate supplementation on the metatranscriptome and metaproteome of lay hen cecal microorganisms. The results show that sodium butyrate can reduce ammonia production by regulating glutamate dehydrogenase expression in cecal microorganisms.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Veterinary Sciences
Xianxin Chen, Xinhong Zhou, Shiyi Li, Huaidan Zhang, Zhenkun Liu
Summary: This study evaluated the effects of tea residues-fermented feed on the production performance, egg quality, serum antioxidant capacity, caecal microbiota, and ammonia emissions of laying hens. The results showed that the addition of tea residues-fermented feed improved the egg-laying rate, average egg weight, Haugh unit, and eggshell thickness. It also increased the content of various nutrients in the eggs. Additionally, it enhanced the antioxidant capacity, reduced ammonia emissions, and improved the cecal microbiota of the laying hens.
FRONTIERS IN VETERINARY SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
Zheng Ma, Keren Jiang, Dandan Wang, Zhang Wang, Zhenzhen Gu, Guoxi Li, Ruirui Jiang, Yadong Tian, Xiangtao Kang, Hong Li, Xiaojun Liu
Summary: This study compared the hypothalamus transcriptome profiles of Lushi blue-shelled-egg chickens and Rhode Island Red chickens, and identified potential core genes responsible for the egg-laying rate difference between the two breeds. These findings pave the way for investigating the mechanism of egg-laying regulation and enrich the theory of chicken reproductive regulation.
Article
Agriculture, Dairy & Animal Science
Markus Rodehutscord, Vera Sommerfeld, C. Roselina Angel, Douglas R. Korver
Summary: The objective of this contribution is to summarize the optimal concentration of nonphytate phosphorus (NPP) in feed for laying hens from scientific literature. The data suggests that the NPP concentration in feed should not exceed 2.2 g NPP/kg without the use of phytase, as it shows no positive effect on performance and eggshell. The addition of phytase to the feed can reduce this value, but precise values of reduction cannot be calculated due to insufficient data.
Article
Agriculture, Dairy & Animal Science
T. Chang, J. Ngo, J. Vargas, E. Rocheford, T. Rocheford, D. Ortiz, D. M. Karcher, T. A. Johnson
Summary: Further investigation is needed to determine the impact of carotenoids from different corn sources on the chicken microbiome. This study found that the cecal bacterial community composition differed significantly in chickens fed orange corn compared to white corn, but there was no difference between yellow corn and the other groups.
Article
Agriculture, Dairy & Animal Science
Markus Rodehutscord, Vera Sommerfeld, C. Roselina Angel, Douglas R. Korver
Summary: The optimal concentration of nonphytate phosphorus (NPP) in feed for laying hens was summarized from scientific literature. The results showed that increasing the NPP concentration above 2.2 g NPP/kg of feed without phytase supplementation did not have a positive effect on performance and eggshell quality. Therefore, laying hens in different stages of production require no more than 2.2 g NPP/kg of feed. This value can be reduced when phytase is added to the feed, but there are insufficient data to determine the precise reduction rate.
Article
Agriculture, Dairy & Animal Science
Lara A. van Veen, Anna C. M. van den Oever, Bas Kemp, Henry van den Brand
Summary: Daily farm management is crucial for laying hen health, welfare, and productivity. However, there is a lack of sensor-based support for farmers. A survey was conducted to identify important indicators for assessing laying hen health and welfare, and stakeholders expressed interest in using cameras and microphones. The integration and visualization of collected data into a monitoring system were also highlighted.
Article
Agriculture, Dairy & Animal Science
Tzuen-Rong J. Tzeng, Tzu-Yu Liu, Chiao-Wei Lin, Pei-En Chang, Pei-Xin Liao, Wen-Yuan Yang, Chih-Yuan Cheng, Pei-Chun Liao, Wen-Dee Chiang, Shih-Torng Ding, Yuan-Yu Lin
Summary: The study shows that Hydrastis canadensis can improve egg albumen height and modulate the cecum digesta microbiota composition of laying hens, providing additional health benefits for the chickens.
Article
Agriculture, Dairy & Animal Science
Yoo-Bhin Kim, Sang-Hyeok Lee, Da-Hye Kim, Hyun-Gwan Lee, Yongjun Choi, Sung-Dae Lee, Kyung-Woo Lee
Summary: This study aimed to evaluate the effects of organic and inorganic sulfur on laying hens. The results showed that both types of sulfur had positive effects on ileal morphology and antioxidant capacity in laying hens. However, sodium sulfate inhibited laying performance and further research is needed.
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.