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horizontal gene transfer

  • Open Access
    Genomic Background Governs Opposing Responses to Nalidixic Acid upon Megaplasmid Acquisition in <em>Pseudomonas</em>
    Research Article | Ecological and Evolutionary Science
    Genomic Background Governs Opposing Responses to Nalidixic Acid upon Megaplasmid Acquisition in Pseudomonas

    Numerous studies have demonstrated that gene transfer events (e.g., plasmid acquisition) can entail a variety of costs that arise as by-products of the incorporation of foreign DNA into established physiological and genetic systems. These costs can be ameliorated through evolutionary time by the occurrence of compensatory mutations, which stabilize the presence of a horizontally transferred region within the genome but which also may...

    David A. Baltrus, Caitlin Smith, MacKenzie Derrick, Courtney Leligdon, Zoe Rosenthal, Madison Mollico, Andrew Moore, Meara Clark
  • Open Access
    Staphylococcal Protein A (<em>spa</em>) Locus Is a Hot Spot for Recombination and Horizontal Gene Transfer in <span class="named-content genus-species" id="named-content-1">Staphylococcus pseudintermedius</span>
    Research Article | Ecological and Evolutionary Science
    Staphylococcal Protein A (spa) Locus Is a Hot Spot for Recombination and Horizontal Gene Transfer in Staphylococcus pseudintermedius

    Staphylococcus pseudintermedius is a major canine pathogen but can also occasionally infect humans. Identification of genetic factors contributing to the virulence and clonal success of multidrug-resistant S. pseudintermedius clones is critical for the development of therapeutics against this...

    Alem Zukancic, Mubin A. Khan, Sumayya J. Gurmen, Quinn M. Gliniecki, Dayna L. Moritz-Kinkade, Carol W. Maddox, Md Tauqeer Alam
  • Open Access
    Antibiotic Resistance in <span class="named-content genus-species" id="named-content-1">Vibrio cholerae</span>: Mechanistic Insights from IncC Plasmid-Mediated Dissemination of a Novel Family of Genomic Islands Inserted at <em>trmE</em>
    Research Article | Molecular Biology and Physiology
    Antibiotic Resistance in Vibrio cholerae: Mechanistic Insights from IncC Plasmid-Mediated Dissemination of a Novel Family of Genomic Islands Inserted at trmE

    The increasing association of the etiological agent of cholera, Vibrio cholerae serogroup O1 and O139, with multiple antibiotic resistance threatens to deprive health practitioners of this effective tool. Drug resistance in cholera results mainly from acquisition of mobile genetic elements. Genomic islands conferring multidrug resistance and mobilizable by IncC...

    Nicolas Rivard, Rita R. Colwell, Vincent Burrus
  • Open Access
    Tracking of Antibiotic Resistance Transfer and Rapid Plasmid Evolution in a Hospital Setting by Nanopore Sequencing
    Research Article | Clinical Science and Epidemiology
    Tracking of Antibiotic Resistance Transfer and Rapid Plasmid Evolution in a Hospital Setting by Nanopore Sequencing

    Infections with multidrug-resistant bacteria represent a major threat to global health. While the spread of multidrug-resistant bacterial clones is frequently studied in the hospital setting, surveillance of the transfer of mobile genetic elements between different bacterial species was difficult until recent advances in sequencing technologies. Nanopore sequencing technology was applied to track antimicrobial gene transfer in a long-...

    Silke Peter, Mattia Bosio, Caspar Gross, Daniela Bezdan, Javier Gutierrez, Philipp Oberhettinger, Jan Liese, Wichard Vogel, Daniela Dörfel, Lennard Berger, Matthias Marschal, Matthias Willmann, Ivo Gut, Marta Gut, Ingo Autenrieth, Stephan Ossowski
  • Open Access
    Phylogeographical Analyses and Antibiotic Resistance Genes of <em>Acinetobacter johnsonii</em> Highlight Its Clinical Relevance
    Observation | Clinical Science and Epidemiology
    Phylogeographical Analyses and Antibiotic Resistance Genes of Acinetobacter johnsonii Highlight Its Clinical Relevance

    Acinetobacter johnsonii has been severely understudied and its population structure and the presence of antibiotic resistance genes (ARGs) are very much uncertain. Our phylogeographical analysis shows that intercontinental transmission has occurred frequently and that different lineages are circulating within single countries; notably, clinical and nonclinical strains...

    Santiago Castillo-Ramírez, Valeria Mateo-Estrada, Gerardo Gonzalez-Rocha, Andrés Opazo-Capurro
  • Open Access
    Diversity of Secondary Metabolism in <span class="named-content genus-species" id="named-content-1">Aspergillus nidulans</span> Clinical Isolates
    Research Article | Ecological and Evolutionary Science
    Diversity of Secondary Metabolism in Aspergillus nidulans Clinical Isolates

    Much of what we know about the genetics underlying secondary metabolite (SM) production and the function of SMs in the model fungus Aspergillus nidulans comes from a single reference genome. A growing body of research indicates the importance of biosynthetic gene cluster (BGC) and SM diversity within a species. However, there is no information about the natural...

    M. T. Drott, R. W. Bastos, A. Rokas, L. N. A. Ries, T. Gabaldón, G. H. Goldman, N. P. Keller, C. Greco
  • Open Access
    Mouse Genetic Background Affects Transfer of an Antibiotic Resistance Plasmid in the Gastrointestinal Tract
    Editor's Pick Research Article | Host-Microbe Biology
    Mouse Genetic Background Affects Transfer of an Antibiotic Resistance Plasmid in the Gastrointestinal Tract

    Antibiotic resistance is a threat to public health. Many clinically relevant antibiotic resistance genes are carried on plasmids that can be transferred to other bacterial members in the gastrointestinal tract. The current study used a murine model to study the transfer of a large antibiotic resistance plasmid from a foodborne Salmonella strain to a gut commensal E...

    Logan C. Ott, Zachary R. Stromberg, Graham A. J. Redweik, Michael J. Wannemuehler, Melha Mellata
  • Open Access
    Role of Horizontal Gene Transfer in the Development of Multidrug Resistance in <span class="named-content genus-species" id="named-content-1">Haemophilus influenzae</span>
    Research Article | Clinical Science and Epidemiology
    Role of Horizontal Gene Transfer in the Development of Multidrug Resistance in Haemophilus influenzae

    Haemophilus influenzae colonizes the respiratory tract in humans and causes both invasive and noninvasive infections. As a threat to treatment, resistance against critically important antibiotics is on the rise in H. influenzae. Identifying mechanisms for horizontal acquisition of resistance genes...

    Kristin Hegstad, Haima Mylvaganam, Jessin Janice, Ellen Josefsen, Audun Sivertsen, Dagfinn Skaare
  • Open Access
    Biofilm Formation Drives Transfer of the Conjugative Element ICE<em>Bs1</em> in <em>Bacillus subtilis</em>
    Research Article | Applied and Environmental Science
    Biofilm Formation Drives Transfer of the Conjugative Element ICEBs1 in Bacillus subtilis

    Transfer of mobile genetic elements from one bacterium to another is the principal cause of the spread of antibiotic resistance. However, the dissemination of these elements in environmental contexts is poorly understood. In clinical and environmental settings, bacteria are often found living in multicellular communities encased in a matrix, a structure known as a biofilm. In this study, we examined how forming a biofilm influences the...

    Frédéric Lécuyer, Jean-Sébastien Bourassa, Martin Gélinas, Vincent Charron-Lamoureux, Vincent Burrus, Pascale B. Beauregard
  • Open Access
    Prey Range and Genome Evolution of <span class="named-content genus-species" id="named-content-1">Halobacteriovorax marinus</span> Predatory Bacteria from an Estuary
    Research Article | Ecological and Evolutionary Science
    Prey Range and Genome Evolution of Halobacteriovorax marinus Predatory Bacteria from an Estuary

    Predatory bacteria attack and digest other bacteria and therefore may play a role in shaping microbial communities. To investigate phenotypic and genotypic variation in saltwater-adapted predatory bacteria, we isolated Halobacteriovorax marinus BE01 from an estuary in Rhode Island, assayed whether it could attack different prey bacteria, and sequenced and analyzed its...

    Brett G. Enos, Molly K. Anthony, Joseph A. DeGiorgis, Laura E. Williams

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