His main research concerns Microbiology, Virulence, Genetics, Brucella and Brucella suis. His work carried out in the field of Microbiology brings together such families of science as Aroa, Enterobacteriaceae, Escherichia coli and Salmonella. His study in Virulence is interdisciplinary in nature, drawing from both Virology, Sleeping Beauty transposon system, Burkholderia vietnamiensis, Transposon mutagenesis and Innate immune system.
His studies deal with areas such as Pathogen, Intracellular parasite, Phagosome, Phagosome acidification and Effector as well as Brucella. His biological study spans a wide range of topics, including Secretion, Operon and Transposable element, Transposon integration. David O'Callaghan combines subjects such as Sinorhizobium meliloti and Restriction site with his study of Genome.
David O'Callaghan mostly deals with Microbiology, Virulence, Brucella, Brucella suis and Genetics. His research in Microbiology intersects with topics in Virology, Salmonella, Bacteria and Enterobacteriaceae, Escherichia coli. His Virology research incorporates elements of Aroa, Immune system and Antigen.
His Virulence study integrates concerns from other disciplines, such as Pathogen, Caenorhabditis elegans, Mutant, Zebrafish and Innate immune system. His work deals with themes such as Virulence factor, Phylogenetics and Genomics, which intersect with Brucella. The concepts of his Brucella suis study are interwoven with issues in Secretion, Periplasmic space, Operon and Agrobacterium tumefaciens.
His scientific interests lie mostly in Microbiology, Brucella, Virulence, Brucellosis and Genetics. His Microbiology research is multidisciplinary, incorporating perspectives in Secretion, Bacteria, Staphylococcus aureus and Brucella suis. In the field of Brucella, his study on Brucella melitensis overlaps with subjects such as Matrix assisted laser desorption ionization time of flight, Desorption and Protocol.
David O'Callaghan has researched Virulence in several fields, including Pathogen, Intracellular parasite, Escherichia coli, Phylogenetics and Innate immune system. His Brucellosis research incorporates themes from One Health, Chronic infection, Zoonosis and Disease. His study in the field of Inverted repeat, Plasmid and Genome also crosses realms of Host Factor 1 Protein.
His primary areas of investigation include Brucella, Phylogenetics, Virulence, Intracellular parasite and Innate immune system. The study incorporates disciplines such as Chromatography and Mass spectrometry in addition to Brucella. His Phylogenetics research is multidisciplinary, incorporating elements of Strain, Brucella inopinata, Ochrobactrum anthropi and Microbiology.
His Intracellular parasite research is classified as research in Genetics. His Innate immune system study incorporates themes from Respiratory burst, Burkholderia cepacia complex, Burkholderia cenocepacia and Bacteria. As part of his studies on Pseudomonas aeruginosa, he frequently links adjacent subjects like Immunology.
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The genome sequence of the facultative intracellular pathogen Brucella melitensis
Vito G. Delvecchio;Vinayak Kapatral;Rajendra J. Redkar;Guy Patra.
Proceedings of the National Academy of Sciences of the United States of America (2002)
A homologue of the Agrobacterium tumefaciens VirB and Bordetella pertussis Ptl type IV secretion systems is essential for intracellular survival of Brucella suis.
David O'Callaghan;Chantal Cazevieille;Annick Allardet-Servent;Maria Laura Boschiroli.
Molecular Microbiology (2002)
Brucellosis: a worldwide zoonosis.
Maria-Laura Boschiroli;Vincent Foulongne;David O'Callaghan.
Current Opinion in Microbiology (2001)
The Brucella suis virB operon is induced intracellularly in macrophages
Maria Laura Boschiroli;Safia Ouahrani-Bettache;Vincent Foulongne;Sylvie Michaux-Charachon.
Proceedings of the National Academy of Sciences of the United States of America (2002)
Characterization of aromatic- and purine-dependent Salmonella typhimurium: attention, persistence, and ability to induce protective immunity in BALB/c mice.
D. O'callaghan;D. Maskell;F. Y. Liew;C. S. F. Easmon.
Infection and Immunity (1988)
Identification of Brucella suis genes affecting intracellular survival in an in vitro human macrophage infection model by signature-tagged transposon mutagenesis.
Vincent Foulongne;Giséle Bourg;Chantal Cazevieille;Sylvie Michaux-Charachon.
Infection and Immunity (2000)
The evolution of chronic infection strategies in the α-proteobacteria
Jacques Batut;Siv G. E. Andersson;David O'Callaghan.
Nature Reviews Microbiology (2004)
Genome structure and phylogeny in the genus Brucella.
S Michaux-Charachon;G Bourg;E Jumas-Bilak;P Guigue-Talet.
Journal of Bacteriology (1997)
Salmonella typhimuriumaroA mutants as carriers of the Escherichia coli heat-labile enterotoxin B subunit to the murine secretory and systemic immune systems
Duncan J. Maskell;Kathy J. Sweeney;David O'Callaghan;Carlos E. Hormaeche.
Microbial Pathogenesis (1987)
High efficiency transformation of Salmonella typhimurium and Salmonella typhi by electroporation.
David O'Callaghan;Alain Charbit.
Molecular Genetics and Genomics (1990)
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