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Dissertations / Theses on the topic 'Streptococcus uberis'

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Published: 4 June 2021

Last updated: 25 July 2025

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1

Pryor, Shona Marie. "Bovine mastitis and ecology of Streptococcus uberis." The University of Waikato, 2008. http://hdl.handle.net/10289/2580.

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Bovine mastitis caused by Streptococcus uberis is a common problem in pasture-based dairying systems. This study examines both the ecology of S. uberis and infection of the bovine mammary gland on a New Zealand dairy farm. Initially, the REP-PCR strain typing method was developed and the potential of MALDI-TOF mass spectrometry evaluated as a strain typing method. While strain-specific mass spectra were obtained with MALDI-TOF mass spectrometry, the irreproducibility of spectra was its major downfall. With further work, this rapid method could be very useful for strain typing S. uberis on a la

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2

Gilchrist, Tamara Louise. "Genotypic and phenotypic characterisation of Streptococcus uberis." Thesis, University of Glasgow, 2011. http://theses.gla.ac.uk/2938/.

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Streptococcus uberis is an important bovine mastitis pathogen, which places a significant financial burden upon the dairy industry. Determining the genetic diversity of a collection of field isolates and the mechanisms by which S. uberis colonises the host were the general aims of this project, in particular the determination of the basis for bacterial persistence despite antibacterial therapy. Multi-locus sequence typing identified high levels of recombination within the population, but also a single dominant clonal complex which comprised nearly all sequence types which were isolated from mo

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3

Crowley, Rebecca Clare. "Molecular analysis of biofilm growth in streptococcus uberis." Thesis, University of Sussex, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488613.

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Streptococcus uberis is a major causative agent of bovine intramammary infections worldwide. S. uberis infections can persist for several months and resistance to antibiotic therapies has been observed. At present, the failure to bring S. uberis infections under control has been linked to the current lack of information with regards to S. uberis pathogenesis.

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4

Rapier, Christopher David. "Characterisation of the plasmin receptor of Streptococcus uberis." Thesis, University of Bristol, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268981.

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5

Denham, Emma Louise. "Molecular characterisation of lipoprotein processing in Streptococcus uberis." Thesis, University of Leicester, 2007. http://hdl.handle.net/2381/30496.

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Streptococcus uberis is a common cause of bovine mastitis and the lipoprotein MtuA has been shown to be essential for growth in milk and virulence. The enzymes responsible for processing lipoproteins in other Gram positive bacteria are lipoprotein diacylglyceryl transferase (Lgt) which acts to anchor lipoproteins to the membrane and lipoprotein signal peptidase (Lsp) which cleaves the signal peptide. S. uberis mutants containing lesions in lgt and lsp uncovered several novel phenotypes. A number of additional proteins were shown to be present in extracellular fractions prepared from lgt- and l

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6

Hossain, Muhammad Maqsud. "Bioinformatic analysis of Streptococcus uberis genes and genomes." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/37355/.

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Streptococcus uberis is a Gram-positive, catalase-negative member of the family Streptococcaceae and is an important environmental pathogen primarily responsible for a significant amount of bovine intramammary infections. This thesis describes the sequencing and comparison of multiple strains from clinical and sub-clinical infections. Following de novo assembly, these are compared to the single reference strain (0140J). The assemblies of strains sequenced with two technologies (Illumina and SOLiD) were compared. From these assemblies, annotation allowed the comparison of gene content, the pan

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7

Wirawan, Ruth E., and n/a. "An investigation into the antimicrobial repertoire of Streptococcus uberis." University of Otago. Department of Microbiology & Immunology, 2007. http://adt.otago.ac.nz./public/adt-NZDU20070312.142108.

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Streptococcus uberis, an environmental organism also associated with dairy animals, is a common and persistent cause of bovine mastitis. New approaches to control these infections need to be identified. One such strategy may be the application of bacteriocins; proteinaceous antimicrobials elaborated by bacteria that typically inhibit the growth of strains closely related to the producer organism. The well-characterized lactococcal bacteriocin nisin is the active ingredient in two commercial products currently in use for the prevention of mastitis. However, reports of resistance development hav

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8

Copsey, Sarah Denise. "Characterisation of a metal-ion dependent repressor in Streptococcus uberis." Thesis, University of Sussex, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426229.

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9

Khan, Izhar-ul-Haq. "Identification and further characterization of Streptococcus uberis and Streptococcus parauberis isolated from bovine milk samples." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=964881799.

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10

Vinha, Rita Bronze. "Utilização intramamária de benzilpenicilina procaínica na terapêutica de mamites por Streptococcus uberis." Master's thesis, Universidade de Lisboa, Faculdade de Medicina Veterinária, 2020. http://hdl.handle.net/10400.5/20242.

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Dissertação de Mestrado Integrado em Medicina Veterinária<br>Streptococcus uberis é um agente etiológico de mamites, ubiquitário no ambiente das vacas sendo considerado ambiental, porém com alguma componente contagiosa. Atualmente, é considerado um dos agentes mais preocupantes, que produz mamites tanto subclínicas como clínicas graves e, frequentemente, associadas a contagens de células somáticas (CCS) elevadas. Estas infeções acarretam uma grande dificuldade no processo de cura e as medidas clássicas de controlo de mamites não se demonstram eficazes contra este agente, pois dispõe de vários

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11

Collado, Gimbert Rosa. "Desenvolupament d’una vacuna contra la mamitis bovina causada per Streptococcus uberis." Doctoral thesis, Universitat de Girona, 2019. http://hdl.handle.net/10803/670298.

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Bovine mastitis caused by Streptococcus uberis is a major problem in the dairy industry worldwide. Despite of that, there is no vaccine commercial available against it. Therefore, the objectives of this doctoral thesis are framed in phases 1 and 2 of the development process of a new vaccine against bovine mastitis caused by S. uberis<br>La mamitis bovina causada per Streptococcus uberis és un problema de gran importància en les explotacions lleteres bovines a nivell mundial i en l’actualitat no existeix cap vacuna comercial que hagi demostrat ser eficaç per combatre aquesta patologia. Els obje

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12

Jones, Catherine Louise. "Molecular characterisation of an essential membrane transporter system of 'Streptococcus uberis'." Thesis, University of Sussex, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424206.

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13

Ricardo, Patrícia Manuel Quintas. "Clínica e cirurgia de espécies pecuárias: estudo dos ambientais em mastites clínicas." Master's thesis, Universidade de Évora, 2014. http://hdl.handle.net/10174/14004.

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Do presente relatório constam a descrição das atividades desenvolvidas no âmbito do estágio curricular do Mestrado Integrado de Medicina Veterinária, assim como uma revisão bibliográfica referente às mastites bovinas, nomeadamente as de origem ambiental. Por fim, é apresentado um trabalho experimental desenvolvido, cujo objetivo foi estudar os agentes ambientais responsáveis por mastites clínicas com visível descoloração do leite. Atualmente, as mastites bovinas representam o maior desafio da indústria leiteira e são, não só uma preocupação entre produtores, mas também entre os consumidores qu

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14

Swanson, Kara M., and n/a. "The bovine mammary gland immune response to Streptococcus uberis and its bacteriocins." University of Otago. Department of Microbiology & Immunology, 2008. http://adt.otago.ac.nz./public/adt-NZDU20080407.112302.

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Bovine mastitis is one of the most costly dairy-based diseases worldwide. Streptococcus uberis is a prevalent causative organism of mastitis and resides naturally in the environment of the dairy cow making prevention of the disease difficult. New strategies need to be developed to control this pathogen. However, a fundamental understanding of the complex relationships that exist between the cow, the pathogen and the environment are required in order to advance the development of prevention strategies. Microarray technology was used to evaluate the complex transcriptional changes which occur in

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15

Thomson, Caroline M. A. "Induction of resistance to phagocytic killing of Streptococcus uberis by bovine neutrophils." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259889.

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16

Achard, Adeline. "Bases biochimiques et génétiques de la résistance aux macrolides et antibiotiques apparentés chez Streptococcus agalactiae et Streptococcus uberis." Caen, 2007. http://www.theses.fr/2007CAEN2007.

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L’utilisation des antibiotiques du groupe des macrolides et apparentés (MLS) en médecine humaine et vétérinaire a conduit à l’émergence de bactéries résistantes. Cette émergence est préoccupante chez les streptocoques. Les travaux réalisés ont permis de mettre en évidence l’émergence de résistances par inactivation des MLS chez deux espèces du genre Streptococcus : Streptococcus agalactiae et Streptococcus uberis. La première concerne une résistance aux lincosamides chez S. Agalactiae et S. Uberis, et la seconde une résistance à la spiramycine (macrolide à 16 atomes) chez S. Uberis. La résista

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17

Czabanska, Anna [Verfasser]. "Immunochemical investigations of the cell envelope components isolated from Streptococcus uberis / Anna Czabanska." Lübeck : Zentrale Hochschulbibliothek Lübeck, 2014. http://d-nb.info/1047790920/34.

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18

Barker, Timothy Richard. "A study of mastitis in dairy herds with particular reference to Streptococcus uberis." Thesis, University of Glasgow, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302001.

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19

Smith, Amanda Jane. "The identification of genes required for the growth of Streptococcus uberis in milk." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428160.

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20

Grant, Raymond G. "The role of the bovine mammary gland in immunological responses to Streptococcus uberis." Thesis, University of Bristol, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261337.

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21

Rato, Márcia Alexandra Gonçalves. "Epidemiological characterization, antimicrobial resistance and virulence mechanisms of human and animal streptococci." Doctoral thesis, Faculdade de Ciências e Tecnologia, 2011. http://hdl.handle.net/10362/7501.

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Dissertação para obtenção do Grau de Doutor em Biologia<br>Streptococcus agalactiae (Group B Streptococcus - GBS), Streptococcus dysgalactiae subsp. dysgalactiae (Group C Streptococcus - GCS) and Streptococcus uberis are relevant mastitis pathogens, a highly prevalent and costly disease in the dairy industry due to antibiotherapy and loss in milk production. However, molecular characterization of field isolates of Streptococcus spp. occurring in Portugal was not known prior to our studies and is important to improve therapeutic and disease control programs. The aims of this study were the ide

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22

Jiang, Min. "Molecular characterization of Streptococcus uberis CAMP factor, lactoferrin binding protein and their upstream genes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/nq24025.pdf.

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23

Watt, Catherine Judy. "The epidemiology of intramammary infection in dairy cows, with particular reference to Streptococcus uberis." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325614.

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24

Tassi, Riccardo. "Response to intramammary challenge with putatively host-adapted and non-adapted strains of Streptococcus uberis in cattle." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/15910.

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Streptococcus uberis is an important cause of intramammary infection in dairy cattle. Strains of S. uberis appear to differ in their ability to cause disease based on previous epidemiological studies. We explored the pathogenicity of 2 strains of S. uberis, where one strain represented a putatively host-adapted type based on its ability to cause persistent infection and to spread from cow to cow in a lactating herd. This type was part of a clonal complex that is commonly associated with bovine mastitis. The other strain, which was isolated from a transient infection in a single animal in the s

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25

Kitt, Andrew John. "The auxotrophic nature of Streptococcus uberis : the acquisition of essential amino acids from plasmin hydrolysed bovine caseins." Thesis, University of Reading, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265715.

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26

Orsi, Alessandra Módena. "Capacidade de formação de biofilme e resistência aos antimicrobianos de Staphylococcus aureus e Streptococcus uberis causadores de mastite bovina." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/10/10135/tde-02052017-123925/.

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Staphylococcus aureus e Streptococcus uberis são dois patógenos causadores mastite bovina que podem apresentar capacidade de produção de biofilme, o que pode resultar em infecções intramamárias crônicas, menor resposta à terapia, redução de produção de leite e maior risco de descarte das vacas infectadas. Os objetivos deste estudo foram avaliar a: 1) capacidade de formação de biofilme de S. aureus e S. uberis isolados de vacas com mastite clínica (MC) e subclínica (MSC); 2) sensibilidade in vitro e a multirresistência destes agentes a antimicrobianos selecionados (n=12); 3) associação entre a

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27

Moraes, Rayane Amaral da Silva. "Frequência de Streptococcus uberis em amostras de leite de rebanhos bovinos de Minas Gerais e identificação de seus fatores de virulência." Universidade Federal de Minas Gerais, 2010. http://hdl.handle.net/1843/SMOC-9HHN9E.

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Bovine mastitis causes the major economic losses in Brazilian dairy herds, and Streptococcus uberis is an important cause of this disease. Currently, the role of virulence factors of this pathogen in the interaction with the host has been the subject of research, in order to develop new strategies for prevention and control of bovine mastitis. Given the increasing importance of S. uberis in milk production chain in Brazil, in this work the identification of S. uberis was made in milk samples from Minas Gerais herds, using the PCR technique with the extraction of genomic DNA directly from milk.

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28

Renard, Laurent. "Modélisation de la relation pharmacodynamie-pharmacocinétique en antibiothérapie vétérinaire : modélisation pharmacodynamique in vitro d'un antibiotique "temps-dépendant", la spiramycine, et d'un antibiotique "concentration-dépendant", la colistine; stimulation de la relation pharmacocinétique-pharmacodynamie de la colistine vis-à vis de Escherichia coli chez le veau, application de la modèlisation pharmacocinétique/pharmacodynamique au cas de mammites expérimentales à Staphylococcus aureus et à Streptococcus uberis chez la vache laitière." Limoges, 1994. http://www.theses.fr/1994LIMO303C.

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29

Rambeaud, Magdalena. "Dynamics of leukocytes and cytokines during experimentally-induced Streptococcus uberis mastitis." 2002. http://etd.utk.edu/2002/RambeaudMagdalena.pdf.

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Thesis (M.S.)--University of Tennessee, Knoxville, 2002.<br>Title from title page screen (viewed Feb. 26, 2003). Thesis advisor: Stephen P. Oliver. Document formatted into pages (xii, 105 p. : ill.(some col.)). Vita. Includes bibliographical references (p. 83-101).

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30

Vales, Marta Sofia Morais. "Epidemiological Evaluation of Mastitis Caused by Streptococcus Agalactiae and Streptococcus Uberis in Four Dairy Herds in North of Portugal." Master's thesis, 2014. https://hdl.handle.net/10216/74949.

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31

Vales, Marta Sofia Morais. "Epidemiological Evaluation of Mastitis Caused by Streptococcus Agalactiae and Streptococcus Uberis in Four Dairy Herds in North of Portugal." Dissertação, 2014. https://repositorio-aberto.up.pt/handle/10216/74949.

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32

Khan, Izhar-ul-Haq [Verfasser]. "Identification and further characterization of Streptococcus uberis and Streptococcus parauberis isolated from bovine milk samples / submitted by Izhar ul-haq Khan." 2002. http://d-nb.info/964881799/34.

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33

Yu-Hsin, Chang, and 張予馨. "Development of PCR primers and microarrays for the detection of Staphylococcus aureus、Staphylococcus saprophyticus、Staphylococcus epidermidis、Staphylococcus haemolyticus、Streptococcus agalactiae、Streptococcus uberis and Streptococcus bovis using heat shoc." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/18829275241866666629.

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碩士<br>弘光科技大學<br>生物產業研究所<br>97<br>Abstract Staphylococcus spp. including S. aureus, S. saprophyticus, S. epidermidis, S. haemolyticus and S. xylosus, etc. are important pathogenic bacteria, Diagnosis of these staphylococcus species isolated from food poisoning cases and clinical samples are important. Recently, studies revealed that heat shock protein gene, hsp60, hsp10 and hsp10-hsp60 (IGR) sequences can be used as a target gene for the identification of Staphylococcus spp. Therefore, the purpose of this study is to design of species specific PCR primers, i.e., S.aurF/R, S.sap-F/R, S.epi-F/R,

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34

Porfírio, Afonso Almeida. "Charactezation of Virulence and Antibiotic Resistence Genetic Markers in Streptococcus Agalactiae and Strepococcus Uberis Causing Bovine Mastitis." Master's thesis, 2013. https://hdl.handle.net/10216/69045.

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35

Porfírio, Afonso Almeida. "Charactezation of Virulence and Antibiotic Resistence Genetic Markers in Streptococcus Agalactiae and Strepococcus Uberis Causing Bovine Mastitis." Dissertação, 2013. https://repositorio-aberto.up.pt/handle/10216/69045.

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36

Wan-Yu, Pai, and 白宛玉. "Development and application of PCR primers for Streptococcus agalactiae, Strep. uberis and Strep. bovis using heat shock protein gene." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/87831659244078089418.

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碩士<br>弘光科技大學<br>生物科技研究所<br>95<br>Staphylococcus aureus, pathogenic E. coli, Streptococcus agalactiae, Strepto. uberis, and Strepto. bovis, etc., are common pathogens which may cause Mastitis in dairy herds. Conventional methods for the detection of these bacterial species need the use of selection and differentiation medium followed by biochemical and serological identification steps. Such process is time consuming and laborious. Thus, the development of rapid and reliable methods for the detection of these bacterial species is important. In this study, we designed the PCR primer sets, SAG1/

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