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Dissertations / Theses on the topic 'Poultry - China'

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Published: 4 June 2021

Last updated: 1 February 2022

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Xi, Zhiqun, and 習志群. "An investigation on the flavor compounds and texture in Chinese chicken meat." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B42575655.

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Lau, Chun-yu, and 劉鎮宇. "Poultry slaughterhouse waste management in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31254603.

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Liao, Qiuyan, and 廖秋燕. "Live poultry exposure and avian influenza (H5N1) risk perception in Guangzhou, 2006-2007." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B41290586.

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Yeung, Wing-shing, and 楊永成。. "Development of a subunit vaccine against infectious bursal disease virus." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31222055.

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Butt, Ka-man Carmen, and 畢嘉敏. "Molecular epidemiology of H9N2 avian influenza virus in poultry of southern China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B36393915.

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Butt, Ka-man Carmen. "Molecular epidemiology of H9N2 avian influenza virus in poultry of southern China." View the Table of Contents & Abstract, 2005. http://sunzi.lib.hku.hk/hkuto/record/B36393915.

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Duan, Lian, and 段炼. "The genesis and development of H5N1 influenza virus in poultry in China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B46540891.

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Cheung, Chung-lam, and 張仲林. "Genesis and evolution of H6N1 virus in terrestrial poultry in southernChina." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B47158311.

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During the 1997 Hong Kong ‘bird flu’ incident, three subtypes of influenza viruses, including H5N1, H9N2 and H6N1, were co-circulated at the live-poultry markets. Genetic analyses revealed that all these viruses shared the same internal gene complex and might have been all involved in generation of the HK/97-like H5N1 virus. Subsequent epidemiological and genetic studies found that both H6N1 and H9N2 viruses became established and prevalent in minor poultry in the region. However, the genesis pathway for each of these viruses has not been defined. It is also unclear about these three subtypes further interact with each other and evolve in the field, along with the emerging reassortant variants. To address these questions, H6 subtype of avian influenza viruses isolated from terrestrial minor poultry from 2000 to 2005, and from 2006 to 2007 in our influenza surveillance in southern china has been genetically and antigenically analyzed in this study. Genetic and phylogenetic analyses of representative strains indicated that all H6N1 isolates from 2000 to 2007 had W312-like hemagglutinin and neuraminidase genes. These H6N1 viruses have become established in the minor poultry, mainly in quail and chukar, in this region. However, phylogenetic analyses revealed that the internal genes of the H6N1 virus lineage were derived from multiple origins with different evolutionary pathways. Evolution analyses of different gene segments of H6N1 viruses revealed imbalance dynamic evolutionary rates between surface genes and internal genes, which suggests that this virus lineage was more likely a descendant of the HK/97-like H5N1, rather than its precursor virus. Similar to what have been observed in the H5N1 and H9N2 virus lineages, the internal gene complex of the H6N1 viruses was found to undergo extensive reassortment. Many novel internal gene segments of H6N1 viruses were first recognized in the reassortant H9N2 virus particles, suggesting that the gene flow is likely from H9N2 to H6N1. The co-circulation of different virus lineages in southern China has greatly increased the genetic diversity of influenza viruses in this region. Analyses of the dynamics of different H6N1 reassortant variants also showed that some of them became persistent, but others were transient in the field. The increasingly diversified H6N1 and other subtypes of viruses will naturally increase the opportunity of interspecies transmission and dissemination, and may pose renewal threat for public health.
published_or_final_version
Microbiology
Doctoral
Doctor of Philosophy

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Chu, Ying-cheung, and 朱盈彰. "Continuing evolution of H9N2 avian influenza A viruses in poultry in southern China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B47326852.

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Our systematic influenza surveillance in southern China revealed that two lineages of H9N2 influenza viruses, represented by Chicken/Beijing/1/94 and Quail/Hong Kong/G1/97, became endemic in the poultry in southern China since 1990’s. These established H9N2 lineages continually evolved to generate many different reassortants (or genotypes) and caused sporadic human infection cases. As co-circulating with H5N1 influenza viruses, the increasing genetic diversity and the capability to cause sporadic human infection make the H9N2 viruses become one of the major candidates with pandemic potential. Even though highly pathogenic H5N1 influenza viruses were seldom detected at the live-poultry markets of Hong Kong since 2002, H9N2 viruses were still commonly isolated in our surveillance program. The accumulated H9N2 isolates provided an opportunity to get insights into the continual evolution of this subtype virus in the region. In present study, we have systematically analyzed the H9N2 influenza viruses isolated from 2005 to 2010. Antigenic and phylogenetic analyses of 60 representative H9N2 viruses showed that the Ck/Bei-like H9N2 virus lineage continued endemic in the terrestrial poultry during the survey period in southern China. Genotyping analyses revealed four prevalent genotypes or reassortant variants in the field. Fifty-three of the viruses analyzed belonged to genotype B14 and B15, which were also the major reassortant variants prevailing in southern China from 2000 to 2005. The remaining seven viruses belonged to novel genotypes that have not been identified before. Our findings suggested that the Ck/Bei-like lineage continually maintained high genetic diversity in this region. The epidemiological findings showed that the isolation rate of H9N2 virus at the marketing poultry in Hong Kong was dramatically dropped down since 2009, which was different from what have observed in other provinces in southern China, but was closely correlated with the hygiene measures implemented in live-poultry markets in Hong Kong, e.g. not keeping live chicken overnight. These findings suggest the proper market policy would directly impact the prevalence of influenza virus in the field.
published_or_final_version
Microbiology
Master
Master of Philosophy

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吳志峰 and Chi-fung Ng. "Epidemiology of H9N2 avian influenza and impact of intervention in Hong Kong's live poultry markets." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B41711622.

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Xu, Kemin, and 徐克敏. "Prevalence of H9N2 influenza a viruses in poultry in southern China: implications for the emergence of a newpandemic influenza." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39558757.

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Rasatapana, Nattakan. "Communication and management in a traditional Chinese/Thai poultry company." CSUSB ScholarWorks, 2003. https://scholarworks.lib.csusb.edu/etd-project/2182.

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In Thailand a Chinese poultry company employs a traditional Chinese management style which is a didactic syle of leadership. While the company has dramatically grown in the last twenty years, the management structure has not changed to accomodate the organization's growth. The company is experiencing increased turnover and high absenteeism. The purpose of this study is to identify the threats and weaknesses facing the company in terms of decision making, job descriptions, and communication and management structure.

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Xu, Kemin. "Prevalence of H9N2 influenza a viruses in poultry in southern China implications for the emergence of a new pandemic influenza /." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/HKUTO/record/B39558757.

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Martin, Vincent. "Spatial ecology of the persistence and spread of highly pathogenic avian influenza, H5N1 in Southern China." Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209760.

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Les travaux de recherche effectués dans le cadre de cette thèse ont été guidés par le manque d’information et une compréhension limitée des mécanismes épidémiologiques à l’origine de l’émergence et de la diffusion de la grippe aviaire hautement pathogène, souche H5N1 en Chine du Sud, aussi reconnue comme l’épicentre potentiel de l’émergence des virus influenza aviaires à caractères pandémiques.

Dans ce cadre, des données spatio-temporelles relatives aux foyers de la maladie ainsi que des données de surveillance virologiques (isolement du virus effectué dans le cadre du système de surveillance nationale) ont été collectées sur une période de quatre ans et analysées afin d’éxplorer les facteurs de risque relatifs à l’émergence et persistence de la maladie dans certaine zones de production du sud de la Chine. Les analyses ainsi effectuées ont permis d’identifier, à travers l’utilisation de méthodes statistiques robustes ayant fait leur preuve dans le domaine de la santé ou de l’écologie (la régression logistique classique et les arbres de regression logistique), des facteurs de risque liés à certains types de production de volailles (canards élevés en plein air, zones riches en eau et par extension associées à la riziculture) ou des facteurs associés à l’activité humaine. A travers une représentation cartographique des facteurs ainsi identifiés, des cartes de risque ont été produites permettant ainsi de visualiser d’une part les zones à haut risque de persistence de l’infection virale et d’autre part les zones vulnérables à l’apparition de foyers de la maladie, donnant aux autorités nationales la possibilité de mieux cibler leurs politiques de surveillance et de contrôle.

Dans un second temps, notre étude s’est portée sur les marchés à volailles traditionnels du sud de la Chine qui représentent un risque permanent de persistence, d’évolution et de diffusion des virus influenza aviaires, ainsi qu’un risque important en matière de santé publique. La dynamique de ces marchés et les liens qui les unissent ont été étudiés à travers des outils d’analyse empruntés à la sociologie tels que l’Analyse des Réseaux Sociaux (Social Network Analysis). Grace à cette approche, l’importance de l’hygiène de ces marchés et notamment du nettoyage et de la désinfection des cages dans la persistence du virus a été mise en évidence. Enfin, des enquêtes effectuées auprès des vendeurs de volailles ont permis d’identifier l’origine et la destination des animaux vendus et de reconstruire des réseaux plus ou moins intriqués de liens commerciaux qui unissent ces marchés entre eux dans trois provinces du sud de la Chine. L’analyse de ces réseaux et de leurs configurations ont permis d’identifier des marchés à plus haut risque de persistence de l’infection du fait de leur position centrale au sein de ces réseaux. De même qu’il est indispensable de cibler la surveillance et le contrôle de la maladie dans des zones écologiquement favorables à la persistence des virus influenza aviaires, cette étude révèle l’importance de certaines pratiques hygiéniques et commerciales dans la persistence de la maladie et la nécessité de cibler la surveillance et le contrôle au niveau de certains de ces marchés situés au centre d’un réseau dense et connecté, pour pouvoir in fine mieux contrôler la maladie au niveau national.

Doctorat en Sciences agronomiques et ingénierie biologique
info:eu-repo/semantics/nonPublished

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Chiang, Chang Tzu, and 張子強. "Research on Developing a Circular Economy Model：A Study on the Poultry Industry in Rural China." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/9km798.

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碩士
中原大學
工業與系統工程研究所
105
China''s gap between rich and poor in the rural areas are deeper. Furthermore, the financial tsunami in 2008 and the impact of European and American bonds in 2011 cause China''s industry has experienced a downturn in the secondary industry. In addition, the companies of mainland China itself rise rapidly, compete blindly and get subsidies from the government, so that the gap between urban and rural areas has not yet improved. Circular economy is the social production and reproduction activities which are based on the efficient use and recycling of resources. With the lowest possible resource consumption and the environmental cost maximizing the social and environmental benefits. That is following the principle of reduction, re-use, resourcing and harmless, reconciling social production and consumption activities from resource to waste material flow and changing the developing model of the traditional "large-scale production, mass production, large consumption, improving resource productivity, reducing the adverse effects of socio-economic activities on the ecological environment and promoting the harmonious development of human and nature. The traditional linear economy depends on the "excessive use of raw materials - manufacturing production - excessive environmental waste". The circular economy is the way to move towards sustainable development. So that planners could analyze and solve the problem from the perspective of the circular economy when planning the development of economic programs. At present, the production mode of the EU,US and Japan is still based on Lean Production System, rather than the circular economy as the production direction. The nature of circular economy is not the cost of money, but the level of recycling of bio-recycling. There is no performance index KPI (Key Performance Indicator), the calculated value is only a number, as long as there is a cycle, is to achieve circular economy indicators. Andrea Masullo (2017) argues that to achieve organic waste management of circular economy, it is necessary to rebuild the connection between urban and rural areas. The human economy breaks the cycle of natural economy without considering the chain reaction. The consequences are pollution and the imbalance of the basic cycle of the biosphere. When we consume the biomass of the farmland in the urban area, billions of tons of precious materials make the soil run out of quality and cause waste management problems. This study attempts to provide a more feasible system for the rural economy with the definition of the circular economy, the primary factor for the economic development of the environment and its system, and the introduction of the circular economy evaluation index system quality into the study case analysis. According to the case of Wuling Mountain Area in Huaihua City, Hunan Province, the circular economy performance indicators can be used to analyze the relevant performance of the imported objects. It also benefits that how to cooperate with the enterprises to develop the rural circular economy model, and can be used as a case for the future economic model to enhance the strategic direction of continuous improvement.

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SHEN, HUEI-REN, and 許輝仁. "Research on the Organizational Welfare, Service Quality and Member Satisfaction of Republic of China Poultry Marketing Development Association." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/7x9e44.

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"The Socioeconomic and Ecological Drivers of Avian Influenza Risks in China and at the International Level." Doctoral diss., 2018. http://hdl.handle.net/2286/R.I.49308.

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abstract: Avian influenzas are zoonoses, or pathogens borne by wildlife and livestock that can also infect people. In recent decades, and especially since the emergence of highly pathogenic avian influenza (HPAI) H5N1 in 1996, these diseases have become a significant threat to animal and public health across the world. HPAI H5N1 has caused severe damage to poultry populations, killing, or prompting the culling of, millions of birds in Asia, Africa, and Europe. It has also infected hundreds of people, with a mortality rate of approximately 50%. This dissertation focuses on the ecological and socioeconomic drivers of avian influenza risk, particularly in China, the most populous country to be infected. Among the most significant ecological risk factors are landscapes that serve as “mixing zones” for wild waterfowl and poultry, such as rice paddy, and nearby lakes and wetlands that are important breeding and wintering habitats for wild birds. Poultry outbreaks often involve cross infections between wild and domesticated birds. At the international level, trade in live poultry can spread the disease, especially if the imports are from countries not party to trade agreements with well-developed biosecurity standards. However, these risks can be mitigated in a number of ways. Protected habitats, such as Ramsar wetlands, can segregate wild bird and poultry populations, thereby lowering the chance of interspecies transmission. The industrialization of poultry production, while not without ethical and public health problems, can also be risk-reducing by causing wild-domestic segregation and allowing for the more efficient application of surveillance, vaccination, and other biosecurity measures. Disease surveillance is effective at preventing the spread of avian influenza, including across international borders. Economic modernization in general, as reflected in rising per-capita GDP, appears to mitigate avian influenza risks at both the national and sub-national levels. Poultry vaccination has been effective in many cases, but is an incomplete solution because of the practical difficulties of sustained and widespread implementation. The other popular approach to avian influenza control is culling, which can be highly expensive and raise ethical concerns about large-scale animal slaughter. Therefore, it is more economically efficient, and may even be more ethical, to target the socio-ecological drivers of avian influenza risks, including by implementing the policies discussed here.
Dissertation/Thesis
Doctoral Dissertation Biology 2018

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