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Dissertations / Theses on the topic 'Museum E. Coli strains'

Author: Grafiati

Published: 3 June 2025

Last updated: 1 August 2025

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1

Alhaadi, Marai. "Effect of norepinephrine on conjugation of Escherichia coli strains." Kansas State University, 2013. http://hdl.handle.net/2097/15527.

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Master of Science<br>Department of Diagnostic Medicine/Pathobiology<br>Sanjeev K. Narayanan<br>Antibiotics are substances produced by bacteria or fungi that are inhibitory to other bacteria and fungi. Antimicrobial compounds include substances that are naturally produced, chemically modified or completely synthetic (chemically designed or synthesized). The chemical modification of naturally produced antibiotic generally results in increase stability, solubility, increased spectrum of activity, or efficacy. Antimicrobial compounds are used in animals to treat and control infectious diseases,

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2

Cowan, Peter J. "Controlled production of tryptophan by genetically-manipulated strains of Escherichia coli." Connect to thesis, 1992. http://repository.unimelb.edu.au/10187/1020.

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The tryptophan productivity of the genetically-manipulated strain JP4153 was increased 2.5-fold by introducing pMU78, a medium copy-number plasmid carrying a feedback-resistant trp operon. JP4153(pMU78) produced 23.5 g/l of tryptophan at a rate of 0.7 g/l/h when grown at 37 degrees C in a defined glucose and ammonium salts medium in a bench-scale fermentor.<br>During prolonged cultivation in the presence of antibiotic, the recombinant strain generated faster-growing, production-defective variants, which harboure mutated derivatives of pMU78. Insertion sequences were responsible for the two pre

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3

Mickus, Brian E. "Transcriptomic and proteomic analysis of lycopene-overproducing Escherichia coli strains." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/51672.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2009.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Includes bibliographical references.<br>Systems biology represents a powerful method to describe and manipulate phenotypes of interest by incorporating biological information from various levels of cellular organization. Such an approach is illustrated from a library of both rationally-directed and combinatorial gene knockout strains of E. coli recombi

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4

Bin, Thani Ali Salman. "Genomic diversity of ten Escherichia coli strains associated with bloodstream infections." Thesis, University of Leicester, 2009. http://hdl.handle.net/2381/4246.

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Escherichia coli are usually regarded as a harmless human colonic flora. However, pathogenic strains of E. coli have been associated with infections that could range from infected mucosal surfaces by intestinal pathogenic E. coli to the more severe cases of disseminated infections throughout the body by the extraintestinal pathogroups. The main focus of this project was to investigate the genomic contents of pathogenic bloodstream infection (BSI)-associated E. coli strains. This is because the genome contents of the E. coli BSI-associated isolates have not been well studied, with only few repo

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5

Page, Jennifer Anne. "Diversity in Escherichia coli O157:h7 between human and bovine strains." Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/2292.

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6

McPeake, Stuart John William. "Investigation into primary septicaemic infections caused by Escherichia coli strains in chickens." Thesis, Queen's University Belfast, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437481.

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7

Cooke, George Dunstan. "Modified Escherichia coli nuclease expressing strains for the production of recombinant biotherapeutics." Thesis, University College London (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.406341.

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8

Giddey, Kirsten Francis. "Investigating the efficacy of hydrogen peroxide agaisnt isolated environmental Escherichia coli strains." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96613.

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Thesis (MSc Food Sc)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: Surface water used for irrigation is often highly contaminated on a microbial level. Using contaminated surface water for the irrigation of fresh produce can lead to foodborne disease outbreaks and Escherichia coli has been a major cause of foodborne outbreaks associated with fresh produce over the past few years. There are many possible on-farm treatment options available to decrease the high microbial loads present in surface water, one of these is H2O2 and various factors can influence its use. The aim of this study w

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9

Beynon, Linda M. "A structural investigation of the capsular antigens of two E. coli strains K26 and K49." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28624.

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Diseases caused by encapsulated bacteria such as E. coli are among the most prevalent in the world. The polysaccharide capsule (K antigen) is an important factor in the virulence and pathogenicity of E. coli bacteria. Serological classification of these bacteria is also based mainly on the immunologically dominant capsular polysaccharide, due to its location at the bacterial cell surface. In order to understand the role played by the K antigens in bacterial infections, and the chemical basis of serological differentiation, the systematic structural investigation of all the capsular polysacchar

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10

Pinegar, Arthur John. "Escherichia coli in retail processed foods : a source of pathogenic strains for man." Thesis, University of Leeds, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236713.

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11

Pacheco, Catarina Coutinho Gouveia Lopes. "Adaptive response of Escherichia coli K-12 strains to cadmium-induced oxidative stress." Doctoral thesis, Instituto de Ciências Biomédicas Abel Salazar, 2008. http://hdl.handle.net/10216/19350.

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12

Dowling, Ruth. "Biofilm formation in clinical and laboratory strains of Escherichia coli and Campylobacter jejuni." Thesis, University of Central Lancashire, 2006. http://clok.uclan.ac.uk/21822/.

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Biorilms are structured communities of bacterial cells enclosed in a self-produced polymeric matrix that are adherent to an inert or living surface. Their growth on the surface of catheter lines, artificial joints and other surgical implants is of major medical concern. As many laboratory strains have become accustomed to standardised conditions, they are not necessarily representative of clinical strains. This study investigated the effect of horse blood, human blood and human blood components on biofilm. formation by clinical and laboratory isolates of Escherichia coli and Campylobacter jeju

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13

Rivera, F. P., T. J. Ochoa, R. C. Maves, et al. "Genotypic and Phenotypic Characterization of Enterotoxigenic Escherichia coli Strains Isolated from Peruvian Children." American Society for Microbiology, 2014. http://hdl.handle.net/10757/314292.

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Enterotoxigenic Escherichia coli (ETEC) is a major cause of childhood diarrhea. The present study sought to determine the prevalence and distribution of toxin types, colonization factors (CFs), and antimicrobial susceptibility of ETEC strains isolated from Peruvian children. We analyzed ETEC strains isolated from Peruvian children between 2 and 24 months of age in a passive surveillance study. Five E. coli colonies per patient were studied by multiplex real-time PCR to identify ETEC virulence factors. ETEC-associated toxins were confirmed using a GM1-based enzyme-linked immunosorbent assay. Co

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14

Murthy, Kruthi. "Phenotypic Characterization of Escherichia coli strains taken from human Intestinal and Urinary Tracts." Wright State University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=wright1164922969.

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15

Chen, Ruizhen Bailey James E. "Metabolic and energetic studies of recombinant Escherichia coli strains : applications of NMR techniques /." Diss., Pasadena, Calif. : California Institute of Technology, 1994. http://resolver.caltech.edu/CaltechETD:etd-10282005-134201.

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16

Pacheco, Catarina Coutinho Gouveia Lopes. "Adaptive response of Escherichia coli K-12 strains to cadmium-induced oxidative stress." Tese, Instituto de Ciências Biomédicas Abel Salazar, 2008. http://hdl.handle.net/10216/19350.

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17

Chamoun, Michelle N. "Uropathogenic Escherichia coli colonization of the urinary tract: pathways to chronicity." Thesis, Griffith University, 2020. http://hdl.handle.net/10072/396143.

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Chronically recurrent urinary tract infection (rUTI) caused most frequently by uropathogenic strains of Escherichia coli (UPEC) are common infections and cause considerable healthcare burdens. Repeated reintroduction of bacteria into the bladder, such as from sexual intercourse, increases the risk of recurrence and chronicity. Studies have sought to define the complex host-pathogen interactions that occur during chronic rUTI, however many areas of mouse rUTI modelling remain incompletely defined. Interleukin 17A (IL-17A) has important roles in the control of acute UTI and may have important ro

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18

Boczek, Laura A. "The widespread occurrence of the enterohemolysin gene ehly among environmental strains of escherichia coli." Cincinnati, Ohio : University of Cincinnati, 2005. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1132167846.

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19

D'lima, Carol Bonnie. "Genetic characterization of Multidrug resistant strains of Campylobacter coli from turkeys in North Carolina." NCSU, 2007. http://www.lib.ncsu.edu/theses/available/etd-05012007-090334/.

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Commercial turkey flocks in North Carolina are frequently colonized with Campylobacter coli strains that are resistant to several antimicrobials and have been designated multidrug resistant (MDR). Multiple locus sequence typing (MLST) showed that the major sequence types (STs) were turkey-specific. Further subtyping using fla typing, pulsed field gel electrophoresis (PFGE) with SmaI and KpnI as well as plasmid profiles revealed that each of the major MDR STs contained strains of related, but distinct subtypes, providing evidence for genomic diversification within these STs. Numerous strains, w

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20

Payongsri, P. "Synthetic biology approaches for the production of chiral aminoalcohols in engineered E. coli strains." Thesis, University College London (University of London), 2014. http://discovery.ucl.ac.uk/1417375/.

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Transketolase catalyses asymmetric carbon-carbon bond formation and produces 1,3-dihydroxyketones, a functionality that is found in a vast number of natural and synthetic compounds. The wild-type transketolase enzymes from several species can accept a wide range of aldehydes, but industrially exploitable levels of activity tend to be limited to natural substrates and small aliphatic aldehydes. Several single mutants of the transketolase from E. coli were found to have enhanced activity towards non-phosphorylated substrates, non-hydroxylated aldehydes, and cyclic aldehydes. However, aromatic al

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21

McKee, Rosemary. "The occurrence and adherence of verocytotoxin producing Escherichia coli strains in relation to food processing." Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246523.

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22

Kerr, Paul Gerard. "Diagnostic application of monoclonal antibodies to surface antigens of enterohaemorrhagic and enteropathogenic Escherichia coli strains." Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246540.

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23

Liu, Haiyan 1966. "Attenuation of Escherichia Coli Aspartate Transcarbamoylase Expressed in Pseudomonas Aeruginosa Mutant and Wild Type Strains." Thesis, University of North Texas, 1994. https://digital.library.unt.edu/ark:/67531/metadc279106/.

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No apparent repression of pyr gene expression in Pseudomonas aeruginosa is observed upon addition of exogenous pyrimidines to the growth medium. Upon introduction of the subcloned Escherichia coli pyrBI genes for aspartate transcarbamoylase (ATCase) into a P. aeruginosa pyrB mutant strain, repression was observed in response to exogenously fed pyrimidine compounds. The results proved that it is possible to bring about changes in pyrimidine nucleotide pool levels and changes in transcriptional regulation of gene expression as a result. Thus, the lack of regulatory control in P. aeruginosa pyr g

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24

Leeper, Molly Maitland. "Trends in Toxin Profiles of Human Shiga Toxin-Producing Escherichia Coli (STEC) O157 Strains, United States, 1996-2008." Atlanta, Ga. : Georgia State University, 2009. http://digitalarchive.gsu.edu/iph_theses/57/.

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Thesis (M.P.H.)--Georgia State University, 2009.<br>Title from file title page (Digital Archive@GSU, viewed June 16, 2010) Karen Giseker, committee chair; Peter Gerner-Smidt, committee member. Includes bibliographical references (p. 101-105).

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25

Daboob, Ahmed Alsagheer. "Studies on factors affecting the growth and thermotolerance of E. coli strains including the pathogenic O157:H7 serotype." Thesis, University of Strathclyde, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366971.

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26

Fábrega, Fernández María José. "Modulation of intestinal immune response by Outer Membrane Vesicles from probiotic and commensal Escherichia coli strains." Doctoral thesis, Universitat de Barcelona, 2018. http://hdl.handle.net/10803/462958.

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Gut microbiota play a critical role in maintaining human intestinal homeostasis and host health. Bacterial extracellular vesicles are key players in bacteria-host communication as they allow delivery of effector molecules into the host cells. The aim of this thesis was to evaluate the immunomodulatory activity of extracellular vesicles (OMVs) released by two microbiota strains, the probiotic strains Escherichia coli Nissle 1917 (EcN) and the commensal ECOR12. Results obtained using in vitro and ex vivo models of intestinal barrier demonstrated that EcN and ECOR12 OMVs were able to be internali

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27

Keegan, Sally Jane. "Characterisation and adherence mechanisms of Escherichia coli strains causing infection in patients with a reconstructed bladder." Thesis, University of Newcastle Upon Tyne, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369809.

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28

De, Lucia Alessia <1990&gt. "Monitoring of prevalence and persistence of Salmonella and resistant E. coli strains isolated from pig farms." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amsdottorato.unibo.it/9132/1/PhD%20thesis%20reviewed.pdf.

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Salmonella is the second most commonly reported zoonotic. Pork is considered, one of the major sources of human infections. Salmonella control on-farms remains a significant challenge, therefore the first objective of this thesis was to address the role of wild birds and environmental contamination in the epidemiology of Salmonella in one outdoor pig farm. This study suggests that wild bird populations are capable of recycling the infection and contributing to the persistence of Salmonella between batches of pigs. Additionally, the results showed that the environment itself can become a potent

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29

An, Hongyan. "Genetic analysis of virulence determinants of attaching and effacing Escherichia coli strains isolated from pig and dog." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0012/NQ39716.pdf.

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30

Lajhar, Salma A. Ibsais. "Phenotypic and Genotypic Characterisation of Escherichia coli O26 Strains Isolated from Cattle and Clinical sources in Australia." Thesis, Griffith University, 2017. http://hdl.handle.net/10072/371149.

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Escherichia coli (E. coli) O26 is the second most common serogroup of enterohaemorrhagic E. coli (EHEC) implicated in foodborne illness globally with outbreaks occasionally linked to the consumption of cattle related food products. This study was performed to gain insights into the phenotypic and genotypic characteristics of E. coli O26 circulating in Australian cattle and those strains from clinical cases. Initial characterisation determined that E. coli O26 are a genetically diverse group that can belong to a range of pathotypes including: EHEC, atypical enteropathogenic E. coli (aEPEC), pot

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31

Borsari, Andrea. "Susceptibility of escherichia coli strains isolated from outpatient children with community-acquired urinary tract infection in southern Switzerland /." [S.l.] : [s.n.], 2008. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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32

Alwan, Asam Fadel. "The isolation of uroporphyrinogen III synthases from recombinant strains of Escherichia coli and human erythrocytes and their properties." Thesis, University of Southampton, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292930.

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33

Hambitzer, Martin. "Induction of interferon beta in human kidney epithelial cells by virulent and non-virulent strains of Escherichia coli." Thesis, Malmö högskola, Fakulteten för hälsa och samhälle (HS), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-24963.

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Urinvägsinfektioner (UVI) är ett vanligt hälsoproblem som drabbar miljontals människor. Den allvarligaste formen, akut pyelonefrit (APN) kan ge svåra komplikationer. Urinvägspatogena Escherichia coli (UPEC) som orsakar APN uttrycker P fimbrier som specifikt binder till glykosphingolipider på ytan av uroepitelceller. Det sätter igång en toll-like receptor 4 (TLR4) beroende men LPS-oberoende immunreaktion. Den roll som interferon beta (IFN-β) spelar vid bakterieinfektioner är inte helt klarlagd men studier som gjorts på IFN-β knockoutmöss visade på en ökad infektionsbenägenhet och svåra njursymp

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34

Boczek, Laura Ann. "The widespread occurrence of the enterohemolysin gene ehly among environmental strains of Escherichia coli." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1132167846.

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35

Koitabashi, Tsutomu. "Genetic characterization of Escherichia coli O157:H7/- strains carrying the stx2 gene but not producing Shiga toxin 2." Kyoto University, 2006. http://hdl.handle.net/2433/143822.

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36

Volle, Catherine B. "Isolation and characterization of lipopolysaccharides from strains of Escherichia coli and their impact on predation by the bacteria Bdellovibrio bacteriovorus /." Connect to online version, 2006. http://ada.mtholyoke.edu/setr/websrc/pdfs/www/2006/144.pdf.

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37

Osode, Augustina Nwabuje. "Assessment of the prevalence of virulent Eschericia coli strains in the final effluents of wastewater treatment plants in the Eastern Cape Province of South Africa." Thesis, University of Fort Hare, 2010. http://hdl.handle.net/10353/d1001062.

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Escherichia coli (E. coli) is a common inhabitant of surface waters in the developed and developing worlds. The majority of E. coli cells present in water are not particularly pathogenic to humans; however, there are some present in small proportion that possess virulence genes that allow them to colonize the digestive tract. Pathogenic E. coli causes acute and chronic diarrheal diseases, especially among children in developing countries and in travelers in these locales. The present study, conducted between August 2007 and July 2008, investigated the prevalence and distribution of virulent E.

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38

Rojas, López Maricarmen. "Identification of cross-protective antigens to develop a vaccine against instestinal pathogenic E.coli strains. Special Target to enterohemorrhagic E. coli." Thesis, Université Clermont Auvergne‎ (2017-2020), 2018. http://www.theses.fr/2018CLFAS002.

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Cette thèse de doctorat s'est déroulée dans le cadre d'un projet européen FP7 (7th Framework Program) MSCA (Marie Sklodowska-Curie action) ITN (Initiale Training Network) EID (European Industrial Doctorates) appelé DISCo (a multidisciplinary Doctoral Industrial School on novel preventive strategies against Escherichia coli infections) coordonné par Mariagrazia Pizza et co-coordonné par Mickaël Desvaux. Ainsi, ce doctorat s'est déroulé pour moitié en Italie au centre de recherche GSK (GlaxoSmithKline) sur le site de Sienne sous la supervision de Roberto Rosini et la direction de Fabio Polticell

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39

Rump, Lydia Vanessa Verfasser], and Markus [Akademischer Betreuer] [Fischer. "Molecular Characterization of Enterohemorrhagic Escherichia coli (EHEC) : O rough strains and the prevalence and importance of IS629 in E. coli O157:H7 / Lydia Vanessa Rump. Betreuer: Markus Fischer." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2011. http://d-nb.info/1020457465/34.

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Freitas, Diogo André Andrade de. "Infectious etiology in inflammatory bowel disease – participation of mycobacterium avium subsp. paratuberculosis and adherent-invasive strains of escherichia coli." Bachelor's thesis, [s.n.], 2019. http://hdl.handle.net/10284/8522.

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Trabalho Complementar apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Licenciado em Ciências da Nutrição<br>Inflammatory Bowel Disease (IBD) includes Crohn’s Disease (CD) and Ulcerative Colitis (UC), with its etiology still to be established. IBD has been suggested to be an interaction between genetic susceptible host, microbiome interactions and induction of an abnormal immune response. This study proposes to evaluate the multiple literature present and understand the possible activity of bacteria. There have been identified multiple polymorp

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Alhawach, Venicia. "Synthetic Aptamers and Botanic Compounds as Potential Novel Efflux Pump Inhibitors of the TolC Channel in E. Coli Strains." University of Dayton / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1524681568250524.

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Mohammadi, Nargesi Behrouz [Verfasser], and Georg A. [Akademischer Betreuer] Sprenger. "Biotechnological production of aromatic amines and aromatic alcohols by recombinant Escherichia coli strains / Behrouz Mohammadi Nargesi ; Betreuer: Georg A. Sprenger." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2019. http://d-nb.info/1181099374/34.

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Stincone, Anna. "A systems biology approach sheds new light on the regulation of acid adaptation in Escherichia coli BW25113 and MG1655 strains." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4234/.

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The ability of Escherichia coli to survive in extreme acid conditions is an important component of its physiology. In my study I have profiled the Escherichia coli K-12 BW25113 strain using microarray technology and I have analysed a multi-omics dataset representing the transcriptional and metabolic responses of the MG1655 Escherichia coli strain. An initial high-level model in the BW25113 strain representing the interaction between two component systems regulators and effectors functions was built using the ARACNE methodology. My model supported the view that acid resistance involves a mechan

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Mogotsi, Lerato Bonolo. "An assessment of the lipopolysaccharide toxicity of rough and smooth escherichia coli strains cultivated in the presence of zygosaccharomyces bailli." Thesis, Bloemfontein : Central University of Technology, Free State, 2011. http://hdl.handle.net/11462/151.

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Thesis (M. Tech. Environmental health) -- Central University of technology, Free State, 2011<br>In nature microorganisms do not exist alone, but in association with one another. These kinds of associations can also be found in food industries, where cells of the same or different species can attach to pipes (biofilm formation) and a variety of surfaces in food processing environments and in food product such as yoghurt which can contain both yeast and bacteria originating from the starter culture as well as fruit. To control food spoilage organisms and food-borne pathogens preventative measur

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Zhi, Xiaoduo. "Transcription-Coupled DNA Supercoiling in Escherichia Coli: Mechanisms and Biological Functions." FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/865.

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Transcription by RNA polymerase can induce the formation of hypernegatively supercoiled DNA both in vivo and in vitro. This phenomenon has been explained by a “twin-supercoiled-domain” model of transcription where a positively supercoiled domain is generated ahead of the RNA polymerase and a negatively supercoiled domain behind it. In E. coli cells, transcription-induced topological change of chromosomal DNA is expected to actively remodel chromosomal structure and greatly influence DNA transactions such as transcription, DNA replication, and recombination. In this study, an IPTG-inducible, tw

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46

Carroll, Craig E. "The Construction of several nitroreductase and O-acetyltransferase overproducing S. ; Typhimurium tester strains and their application in the Salmonella mutagenicity assay (Ames test)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0023/MQ52401.pdf.

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Ghanegaonkar, Shashank [Verfasser], and Georg [Akademischer Betreuer] Sprenger. "Heterologous biosynthesis of 2-methyl-6-geranylgeranyl benzoquinone and δ-tocotrienol in recombinant Escherichia coli strains / Shashank Ghanegaonkar. Betreuer: Georg Sprenger." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2014. http://d-nb.info/1048048160/34.

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Fowler, Richard Paul. "The acid tolerance response of enteropathogenic Salmonella and Escherichia coli strains : a proteomic characterisation and novel links with motility and virulence." Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340361.

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Machado, Adalva Lopes. "Susceptibility the antimicrobial and profile of strength in strains plasmid Escherichia coli isolated freshwater fish and marine, marketed in Fortaleza - Ce." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16332.

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CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior<br>The marketing of fish has shown substantial increase; however, their place of origin and ways of handling and storage may pose health risk. The microorganisms in the food chain and in capture environments cause concern over the risk of disease transmission and the multiple resistance to several drugs. This study aimed at characterizing the antimicrobial resistance of 191 strains of Escherichia coli isolated from 20 fish samples, ten saltwater samples: (5) mackerel (S. cavalla) and (5) snapper (L. purpureus) and ten freshwater sample

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Lewis, J. "The molecular epidemiology of ampC-mediated resistance in Escherichia coli : a study of clinical strains isolated from the South West region." Thesis, University of the West of England, Bristol, 2016. http://eprints.uwe.ac.uk/27838/.

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Escherichia coli is a common human pathogen, capable of causing a wide range of infections. Some strains produce AmpC beta-lactamase, an enzyme able to affect the action of antibiotics. These strains are often resistant to cephalosporin antibiotics, causing problems for clinical treatment. The production of the enzyme can be mediated by either mutations in the chromosomal ampC promoter region, or through the acquisition of ampC plasmid genes from other species. In this study, SYBR Green real-time PCR was used to detect blaAmpC and blaCTX-M genes in E. coli strains collected in Gloucester and f

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