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K. Karatzas · SciRah

Researcher profile · Semantic Scholar

K. Karatzas

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K. Karatzas — researcher profile on SciRah

h-index: 28
Works: 99
Citations: 3,289

Most-cited papers

Selection of potential probiotic lactic acid bacteria from fermented olives by in vitro tests.
A. Argyri, G. Zoumpopoulou, K. Karatzas, E. Tsakalidou +3 more
2013Food microbiology645 citations
Semantic Scholar
Role of glutamate metabolism in bacterial responses towards acid and other stresses
C. Feehily, K. Karatzas
2013Journal of Applied Microbiology415 citations Open access
Semantic Scholar
Prolonged treatment of Salmonella enterica serovar Typhimurium with commercial disinfectants selects for multiple antibiotic resistance, increased efflux and reduced invasiveness.
K. Karatzas, M. Webber, F. Jørgensen, M. Woodward +2 more
2007Journal of Antimicrobial Chemotherapy183 citations
Semantic Scholar
Phenotypic and Proteomic Characterization of Multiply Antibiotic-Resistant Variants of Salmonella enterica Serovar Typhimurium Selected Following Exposure to Disinfectants
K. Karatzas, L. Randall, M. Webber, L. Piddock +3 more
2007Applied and Environmental Microbiology120 citations Open access
Semantic Scholar
Characterization of a Listeria monocytogenes Scott A Isolate with High Tolerance towards High Hydrostatic Pressure
K. Karatzas, M. Bennik
2002Applied and Environmental Microbiology120 citations Open access
Semantic Scholar
The effect of pH control and 'hydraulic flush' on hydrolysis and Volatile Fatty Acids (VFA) production and profile in anaerobic leach bed reactors digesting a high solids content substrate.
D. Cysneiros, C. J. Banks, S. Heaven, K. Karatzas
2012Bioresource Technology105 citations
Semantic Scholar
The CtsR regulator of Listeria monocytogenes contains a variant glycine repeat region that affects piezotolerance, stress resistance, motility and virulence
K. Karatzas, J. Wouters, C. Gahan, C. Hill +2 more
2003Molecular Microbiology104 citations Open access
Semantic Scholar
The role of sigma B (sigma B) in the stress adaptations of Listeria monocytogenes: overlaps between stress adaptation and virulence.
C. O'Byrne, K. Karatzas
2008Advances in Applied Microbiology101 citations
Semantic Scholar
Characterization of the Intracellular Glutamate Decarboxylase System: Analysis of Its Function, Transcription, and Role in the Acid Resistance of Various Strains of Listeria monocytogenes
K. Karatzas, Laura Suur, C. O'Byrne
2012Applied and Environmental Microbiology82 citations Open access
Semantic Scholar
Antimicrobial Activity of Lipopeptide Biosurfactants Against Foodborne Pathogen and Food Spoilage Microorganisms and Their Cytotoxicity
Konstantina Kourmentza, Xavier Gromada, N. Michael, C. Degraeve +5 more
2021Frontiers in Microbiology81 citations Open access
Semantic Scholar
Functional γ-Aminobutyrate Shunt in Listeria monocytogenes: Role in Acid Tolerance and Succinate Biosynthesis
C. Feehily, C. O'Byrne, K. Karatzas
2012Applied and Environmental Microbiology81 citations Open access
Semantic Scholar
Intracellular Accumulation of High Levels of γ-Aminobutyrate by Listeria monocytogenes 10403S in Response to Low pH: Uncoupling of γ-Aminobutyrate Synthesis from Efflux in a Chemically Defined Medium
K. Karatzas, O. Brennan, S. Heavin, J. Morrissey +1 more
2010Applied and Environmental Microbiology72 citations Open access
Semantic Scholar
Proteomic Analyses of a Listeria monocytogenes Mutant Lacking σB Identify New Components of the σB Regulon and Highlight a Role for σB in the Utilization of Glycerol
F. Abram, W. Su, M. Wiedmann, K. Boor +4 more
2007Applied and Environmental Microbiology70 citations Open access
Semantic Scholar
Arginine-Containing Surfactant-Like Peptides: Interaction with Lipid Membranes and Antimicrobial Activity.
V. Castelletto, R. Barnes, K. Karatzas, C. Edwards-Gayle +5 more
2018Biomacromolecules55 citations Open access
Semantic Scholar
Assessing the microbial oxidative stress mechanism of ozone treatment through the responses of Escherichia coli mutants
S. Patil, V. Valdramidis, K. Karatzas, P. Cullen +1 more
2011Journal of Applied Microbiology54 citations Open access
Semantic Scholar
Inactivation of Listeria monocytogenes in raw and hot smoked trout fillets by high hydrostatic pressure processing combined with liquid smoke and freezing
S. Ekonomou, S. Bulut, K. Karatzas, I. Boziaris
2020Innovative Food Science & Emerging Technologies51 citations Open access
Semantic Scholar
Characterization and antimicrobial efficacy against E. coli of a helium/air plasma at atmospheric pressure created in a plastic package
J. Connolly, V. Valdramidis, E. Byrne, K. Karatzas +3 more
201350 citations Open access
Semantic Scholar
Sulforaphane-enriched extracts from glucoraphanin-rich broccoli exert antimicrobial activity against gut pathogens in vitro and innovative cooking methods increase in vivo intestinal delivery of sulforaphane
Salah Abukhabta, Sameer Khalil Ghawi, K. Karatzas, D. Charalampopoulos +10 more
2020European Journal of Nutrition45 citations Open access
Semantic Scholar
Contingency Locus in ctsR of Listeria monocytogenes Scott A: a Strategy for Occurrence of Abundant Piezotolerant Isolates within Clonal Populations
K. Karatzas, V. Valdramidis, M. Wells-Bennik
2005Applied and Environmental Microbiology45 citations Open access
Semantic Scholar
Divergent Evolution of the Activity and Regulation of the Glutamate Decarboxylase Systems in Listeria monocytogenes EGD-e and 10403S: Roles in Virulence and Acid Tolerance
C. Feehily, A. Finnerty, P. Casey, C. Hill +3 more
2014PLoS ONE41 citations Open access
Semantic Scholar
The role of phase separation and feed cycle length in leach beds coupled to methanogenic reactors for digestion of a solid substrate (Part 1): Optimisation of reactors' performance.
D. Cysneiros, C. J. Banks, S. Heaven, K. Karatzas
2012Bioresource Technology37 citations
Semantic Scholar
Identification of Components of the Sigma B Regulon in Listeria monocytogenes That Contribute to Acid and Salt Tolerance
F. Abram, E. Starr, K. Karatzas, K. Matlawska-Wasowska +5 more
2008Applied and Environmental Microbiology36 citations Open access
Semantic Scholar
Self-Assembly and Antimicrobial Activity of Lipopeptides Containing Lysine-Rich Tripeptides
Anindyasundar Adak, V. Castelletto, Ana Catarina Salvado de Sousa, K. Karatzas +4 more
2024Biomacromolecules34 citations Open access
Semantic Scholar
Study on the effect of citric acid adaptation toward the subsequent survival of Lactobacillus plantarum NCIMB 8826 in low pH fruit juices during refrigerated storage.
Pornpoj Srisukchayakul, D. Charalampopoulos, K. Karatzas
2018Food Research International33 citations Open access
Semantic Scholar
The role of phase separation and feed cycle length in leach beds coupled to methanogenic reactors for digestion of a solid substrate (Part 2): Hydrolysis, acidification and methanogenesis in a two-phase system.
D. Cysneiros, C. J. Banks, S. Heaven, K. Karatzas
2011Bioresource Technology31 citations
Semantic Scholar
Piezotolerant Small-Colony Variants with Increased Thermotolerance, Antibiotic Susceptibility, and Low Invasiveness in a Clonal Staphylococcus aureus Population
K. Karatzas, A. Zervos, C. Tassou, C. Mallidis +1 more
2007Applied and Environmental Microbiology31 citations Open access
Semantic Scholar
Gamma aminobutyric acid production by commercially available probiotic strains.
A. Monteagudo-Mera, Valentina Fanti, Claudia Rodriguez-Sobstel, G. Gibson +3 more
2022Journal of Applied Microbiology30 citations Open access
Semantic Scholar
Anaerobic Digestion of Steam-Exploded Wheat Straw and Co-Digestion Strategies for Enhanced Biogas Production
F. Kaldis, D. Cysneiros, J. Day, K. Karatzas +1 more
2020Applied Sciences30 citations Open access
Semantic Scholar
Thiamine plays a critical role in the acid tolerance of Listeria monocytogenes.
M. Madeo, Niamh O'Riordan, T. Fuchs, Marta Utratna +2 more
2012FEMS Microbiology Letters28 citations Open access
Semantic Scholar
A modified rapid enzymatic microtiter plate assay for the quantification of intracellular γ-aminobutyric acid and succinate semialdehyde in bacterial cells.
C. O'Byrne, C. Feehily, R. Ham, K. Karatzas
2011Journal of Microbiological Methods27 citations
Semantic Scholar
Fitness and dissemination of disinfectant-selected multiple-antibiotic-resistant (MAR) strains of Salmonella enterica serovar Typhimurium in chickens.
L. Randall, M. Bagnall, K. Karatzas, Nick Coldham +2 more
2007Journal of Antimicrobial Chemotherapy26 citations
Semantic Scholar
Loss of SigB in Listeria monocytogenes Strains EGD-e and 10403S Confers Hyperresistance to Hydrogen Peroxide in Stationary Phase under Aerobic Conditions
Márcia Boura, C. Keating, Kévin Royet, R. Paudyal +3 more
2016Applied and Environmental Microbiology25 citations Open access
Semantic Scholar
Investigation into the antimicrobial activity of fumarate against Listeria monocytogenes and its mode of action under acidic conditions.
R. Barnes, K. Karatzas
2020Journal of food microbiology23 citations Open access
Semantic Scholar
Hybrid membrane biomaterials from self-assembly in polysaccharide and peptide amphiphile mixtures: controllable structural and mechanical properties and antimicrobial activity
V. Castelletto, A. Kaur, I. Hamley, R. Barnes +7 more
201723 citations Open access
Semantic Scholar
Inactivation of Escherichia coli K12 in phosphate buffer saline and orange juice by high hydrostatic pressure processing combined with freezing
S. Bulut, K. Karatzas
202122 citations Open access
Semantic Scholar
Effects of repeated cycles of acid challenge and growth on the phenotype and virulence of Salmonella enterica
K. Karatzas, P. Hocking, F. Jørgensen, K. Mattick +2 more
2008Journal of Applied Microbiology22 citations Open access
Semantic Scholar
A novel role for the glutamate decarboxylase system in Listeria monocytogenes; protection against oxidative stress.
Márcia Boura, Dace Brensone, K. Karatzas
2020Food microbiology21 citations Open access
Semantic Scholar
Restructuring of Lipid Membranes by an Arginine-Capped Peptide Bolaamphiphile.
V. Castelletto, R. Barnes, K. Karatzas, C. Edwards-Gayle +4 more
2018Langmuir21 citations Open access
Semantic Scholar
Proteomic analyses of a Listeria monocytogenes mutant lacking sigmaB identify new components of the sigmaB regulon and highlight a role for sigmaB in the utilization of glycerol.
F. Abram, W. Su, M. Wiedmann, K. Boor +4 more
2008Applied and Environmental Microbiology21 citations
Semantic Scholar
A novel approach in acidic disinfection through inhibition of acid resistance mechanisms; Maleic acid-mediated inhibition of glutamate decarboxylase activity enhances acid sensitivity of Listeria monocytogenes.
R. Paudyal, R. Barnes, K. Karatzas
2018Food microbiology18 citations Open access
Semantic Scholar
Assessing the Microbial Oxidative Stress of Ozone: Significant Role of the Oxidative Stress Proteins in the Survival of E. coli in Ozone Treatment
S. Patil, V. Valdramidis, K. Karatzas, P. Cullen +1 more
201917 citations
Semantic Scholar
Ultrasound processing of liquid system(s) and its antimicrobial mechanism of action
David Spiteri, C. Chot-Plassot, Julie Sclear, K. Karatzas +2 more
2017Letters in Applied Microbiology17 citations Open access
Semantic Scholar
A Systematic Quantitative Determination of the Antimicrobial Efficacy of Grape Seed Extract against Foodborne Bacterial Pathogens
Melina Kitsiou, Lisa Purk, J. Gutierrez-Merino, K. Karatzas +2 more
2023Foods15 citations Open access
Semantic Scholar
Amino acids other than glutamate affect the expression of the GAD system in Listeria monocytogenes enhancing acid resistance.
R. Paudyal, C. O'Byrne, K. Karatzas
2020Food microbiology14 citations Open access
Semantic Scholar
Microbial species and strain heterogeneity affect resistance to high pressure processing
Theocharia Tsagkaropoulou, K. Karatzas
2024Innovative Food Science & Emerging Technologies13 citations Open access
Semantic Scholar
Anaerobic digestion of whey permeate: Impact of feedstock ratio and organic loading rate in batch and semi-continuous systems
A. R. Azkarahman, A. Chatzifragkou, D. Cysneiros, K. Karatzas
2025Heliyon11 citations Open access
Semantic Scholar
Ιn Vitro Screening of γ-Aminobutyric Acid and Autoinducer-2 Signalling in Lactic Acid Bacteria Exhibiting Probiotic Potential Isolated from Natural Black Conservolea Olives
Foteini Pavli, E. Gkana, O. Adebambo, K. Karatzas +2 more
2019Foods11 citations Open access
Semantic Scholar
High Phenotypic Variability among Representative Strains of Common Salmonella enterica Serovars with Possible Implications for Food Safety.
W. Abdullah, B. Mackey, K. Karatzas
2018Journal of Food Protection10 citations Open access
Semantic Scholar
Bioactive Natural Products: Facts, Applications, and Challenges
Y. Kourkoutas, K. Karatzas, V. Valdramidis, Nikos G. Chorianopoulos
2015BioMed Research International9 citations Open access
Semantic Scholar
From waste to resource: A review on advancing whey permeate valorization through anaerobic digestion.
A. R. Azkarahman, D. Cysneiros, A. Chatzifragkou, K. Karatzas
2025Journal of Environmental Management8 citations Open access
Semantic Scholar

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