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Dissertations / Theses on the topic 'Bacillus cereus group species'

Author: Grafiati

Published: 10 December 2022

Last updated: 31 July 2025

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1

Barker, Margaret. "Population structure of the Bacillus cereus group." Thesis, Heriot-Watt University, 2006. http://hdl.handle.net/10399/2145.

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The Bacillus cereus group of bacteria comprises B. anthracis, B. cereus, B. mycoides, B. pseudomycoides, B. thuringiensis and B. weihenstephanensis. Species status has been allocated to these taxa largely according to pathogenic properties. B. anthracis is the causative agent of anthrax in ungulates and humans. B. thuringiensis is primarily an insect pathogen and B. cereus is associated with food poisoning and occasionally soft tissue infections in humans. One hundred and forty-six strains of the B. cereus group were examined by multilocus sequence typing (MLST) in which partial sequences for

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2

Oh, Mi Hwa School of Chemical Engineering &amp Industrial Chemistry UNSW. "Ecology of toxigenic bacillus species in rice products." Awarded by:University of New South Wales. School of Chemical Engineering and Industrial Chemistry, 2006. http://handle.unsw.edu.au/1959.4/23942.

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Bacillus cereus is the most prevalent pathogenic Bacillus species found in foods, causing food spoilage and two types of toxin-mediated food poisoning known as the diarrhoeal and emetic syndromes. Other Bacillus species, particularly B. subtilis, B. licheniformis, B. brevis, B. pumilus and B. thuringensis, have also been recognised as food poisoning bacteria of increasing concern, with reports of outbreaks of diarrhoeal or emetic food poisoning. This study involved a systematic ecological investigation of Bacillus species isolated from rice products, commonly associated with Bacillus emetic fo

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3

Pires, Fazion Fernanda. "Role of plasmids of Bacillus cereus group in insect larvae." Thesis, Paris, Institut agronomique, vétérinaire et forestier de France, 2017. http://www.theses.fr/2017IAVF0005/document.

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Bacillus cereus (Bc) et Bacillus thuringiensis (Bt) sont deux espèces génétiquement proches. Bc est une bactérie pathogène que peuvent causer des gastro-entérites d’origine aliméntaire. Bt est une bactérie entomopathogène, dont le cycle de vie dans la larve d’insecte est contrôlé par des systèmes de quorum sensing, comme le système Rap/Phr, que régule processus tels que la sporulation, la formation de biofilm et la conjugaison. La présence des ces genès a été identifiée dans les plasmides, et ces eleménts ont été associés à l’adaptation des spécies dans sont niche ecologique. Le but de cette é

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4

Atkinson, Deborah Jane. "Stress response and inorganic poly-phosphate in the Bacillus group bacteria." Thesis, University of Bath, 2010. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538113.

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This thesis concentrates on the Bacillus cereus group of organisms and interactions that they may encounter in their natural environment. Inorganic polyphosphate has been identified as an important factor of stress and survival in B. cereus. One of the aims of this project was to create knock out mutants of certain enzymes involved in polyphosphate metabolism in B. anthracis, the etiological agent of anthrax. Unfortunately, even though B. anthracis is very closely related to B. cereus and despite the application of published methods it was not possible to create these B. anthracis knockout mut

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5

Taylor, J. M. Walsh. "Identification and isolation of emetic toxin producing Bacillus Cereus and heat-stable toxins from other Bacillus species." Thesis, Glasgow Caledonian University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.415442.

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6

Docherty, Pauline Fletcher. "The survival during milk processing of bacillus cereus with the potential to cause food-borne illness." Thesis, Glasgow Caledonian University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325996.

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7

Frentzel, Hendrik [Verfasser]. "Detection, characterization and survival of Bacillus cereus group members in spices and herbs / Hendrik Frentzel." Berlin : Freie Universität Berlin, 2017. http://d-nb.info/1135184887/34.

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8

Gdoura, épouse Ben Amor Maroua. "Maitrise des risques de contamination des produits alimentaires tunisiens par le groupe Bacillus cereus." Thesis, Rennes, Agrocampus Ouest, 2019. http://www.theses.fr/2019NSARB324.

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Cette thèse s’est intéressée à évaluer le niveau de risque représenté par les bactéries du groupe Bacillus cereus dans des aliments tunisiens et à tester l’efficacité de leur contrôle par le traitement des surfaces industrielles par des bactériophages. Une collection de 191 isolats a été créée à partir de 687 matrices alimentaires. Près de 40 % des isolats se sont avérés appartenir au groupe, avec une forte diversité génétique (143 profils PFGE et 99 profils ERIC-PCR) et un profil thermique intermédiaire (signatures 16S rDNA-1 m et-2 p). Près de 60 % des isolats du groupe appartiennent au grou

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9

Fernandes, Meg da Silva 1984. "Enterococcus spp. e Bacillus cereus isolados do processamento de ricota: patogenicidade, formação de biofilmes multiespécie e detecção de autoindutores AI-2 = Enterococcus spp. and Bacillus cereus isolated from ricotta processing: pathogenicity, multi-species biofilm formation and detection of the autoinducer AI-2." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/255699.

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Orientadores: Arnaldo Yoshiteru Kuaye, Dirce Yorika Kabuki<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-26T05:00:36Z (GMT). No. of bitstreams: 1 Fernandes_MegdaSilva_D.pdf: 2553051 bytes, checksum: ee968bf858cc0b427d8f6b79c37338b7 (MD5) Previous issue date: 2014<br>Resumo: Enterococcus faecium e Enterococcus faecalis são espécies de patógenos oportunistas que infectam principalmente imunocomprometidos. Estas espécies são encontradas em produtos lácteos e possuem capacidade de formar biofilme em superfície

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10

Dubois, Thomas. "Etude du système de communication cellulaire NprR-NprX au sein du groupe Bacillus cereus." Phd thesis, AgroParisTech, 2012. http://pastel.archives-ouvertes.fr/pastel-00770265.

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Chez les bactéries sporulantes du genre Bacillus, des mécanismes importants tels que la sporulation et la virulence sont régulés par des systèmes de communication cellulaire qui impliquent des peptides de signalisation et des régulateurs de la famille RNPP (Rap, NprR, PlcR, PrgX). L'objectif de mon travail de thèse a été de déterminer le rôle du régulateur NprR chez les bactéries du groupe B. cereus. Ce travail se divise en trois parties complémentaires. La première partie a consisté à montrer que NprR est impliqué dans un système de communication cellulaire. Nous avons montré que NprR est un

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11

Techer, Marie Clarisse. "Altération des entremets à base d'ovoproduits : bactéries imliquées et mécanismes en jeu." Thesis, Rennes, Agrocampus Ouest, 2015. http://www.theses.fr/2015NSARB265.

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Parmi les desserts à base d’ovoproduits, l’île flottante est reconnue comme particulièrement sensible d’un point de vue microbiologique car sa commercialisation souffre de la survenue intempestive d’altérations que les industriels souhaitent maîtriser. Les travaux réalisés au cours de cette thèse avaient pour objectif de mieux appréhender ces phénomènes afin de mieux les contrôler. Nous avons montré que l’altération de l’île flottante concernait principalement la crème anglaise et qu’elle s’accompagnait d’un développement bactérien conséquent, d’une fréquente diminution du pH et de modificatio

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12

Drewnowska, Justyna Małgorzata. "Genetic structure of environmental Bacillus cereus sensu lato strains isolated from Northeastern Poland." Phd thesis, 2016. http://hdl.handle.net/11320/4827.

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Rozdziały (3 załączniki) w postaci publikacji naukowych w czasopismach FEMS Microbiology Ecology (Appendix 1) oraz PLOS ONE (Appendix 2 oraz Appendix 3).<br>Przedstawiciele B. cereus s.l. występują powszechnie w środowisku naturalnym i wywierają ogromny wpływ na zdrowie człowieka, przemysł spożywczy oraz rolnictwo. Te tlenowe laseczki z jednej strony produkują toksyny szkodliwe dla ludzi i zwierząt, ale znane są również z syntezy wtórnych metabolitów degradujących niebezpieczne związki chemiczne lub wspomagających wzrost roślin. Powyższe właściwości były intensywnie badane w odniesieniu do sz

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13

Yang, I.-Chen, and 楊怡真. "Study on molecular detection methods and expression of nonhemolytic enterotoxin of Bacillus cereus group." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/53888625646966623397.

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博士<br>臺灣大學<br>微生物與生化學研究所<br>96<br>Bacillus cereus foodborne diseases are a major concern worldwide. In Taiwan for the period 1991 to 2006, outbreaks due to B. cereus were exceeded only by Vibrio parahaemolyticus and Staphylococcus aureus. Five different enterotoxins and one emetic toxin of B. cereus have been characterized. To amplify all of the enterotoxin and emetic-specific sequences of the species in the B. cereus group, a multiplex polymerase chain reaction (multiplex PCR) with 12 primer pairs was established. The assay was successfully applied to analyze the toxigenic potential of 162 is

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14

Branquinho, Fabiana Raquel Gouveia Pinto Nevado. "Unveiling population diversity, biosurfactant and antibacterial agents production of Bacillus pumilus group species." Doctoral thesis, 2014. https://repositorio-aberto.up.pt/handle/10216/74107.

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15

Branquinho, Fabiana Raquel Gouveia Pinto Nevado. "Unveiling population diversity, biosurfactant and antibacterial agents production of Bacillus pumilus group species." Tese, 2013. https://repositorio-aberto.up.pt/handle/10216/74107.

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16

Fricker, Martina [Verfasser]. "Development of genotypic and phenotypic methods for the identification and differentiation of hazardous Bacillus cereus group strains / Martina Fricker." 2007. http://d-nb.info/987922661/34.

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17

Chen, Yan-Lian, and 陳炎鍊. "Toxigenicity, partial 16S rRNA Sequence Comparison and the Use of a Multiplex PCR System for Bacillus cereus Group Cells." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/42593639360374484716.

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碩士<br>國立中興大學<br>食品科學系<br>86<br>B. cereus is one of the food pathogens which may cause foodbornedisease. It is also one of the important items for food inspection. Thus, tounderstand the relationship between its enterotoxins and cytotoxicity andto develop the multiplex PCR system for its detection is important. Based on the hblA gene for B component of hemolysin BL, bceTand entFM genes for enterotoxins, PCR primers aimed for the detectionof B. cereus enterotoxins have been developed. W

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18

Sheu, Sen-Je, and 許勝傑. "Development and use of PCR primers for the detection of Bacillus cereus group cells and their hemolysin BL and/or enterotoxin." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/41189723063616646865.

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碩士<br>國立中興大學<br>食品科學系<br>85<br>Abstract Bacillus cereus is one of the important food pathogenes which may cause food poisoning. To investigate the relationship between B. cereus group cells and their toxigenicities and to develop rapid methods for the detection of B. cereus group cells and their hemolysin BL and/or B. cereus BceT enterotoxin is important. Based on the gene sequences coding for phospholipase C and sphingomyelinase, 16S rRNA, hblA of hemolysin BL B component and bceT, we have

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19

Xu, Sheng-Jie, and 許勝傑. "Development and use of PCR primers for the detection of Bacillus cereus group cells and their hemolysin BL and/or enterotoxin." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/88155725683222242729.

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20

Hung, Cho-Lien, and 洪秋蓮. "Development and application of Oligonucleotide array for the specific detection of Salmonella spp., Escherichia coli, Staphylococcus spp., Bacillus cereus group and Vibrio spp." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/05316621702577842099.

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碩士<br>國立中興大學<br>食品科學系<br>90<br>Abstract Vibrio parahaemolyticus, Staphylococcus aureus, Bacillus cereus group, Salmonella spp., pathogenic Escherichia coli are common pathogens which may cause food poisoning cases. Conventional methods for the detection of these bacteria spp. need the use of selection and differentiation medium followed by biochemical and serological identification steps. Such process is time consuming and laborious. Thus, development of rapid methods for the detection of these bacteria species is important. Biochip may be one of the choices for such purpose. Owing

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