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Infection and Immunity
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type IV secretion system

  • Identification of Pathogenicity Island Genes Associated with Loss of Type IV Secretion Function during Murine Infection with <span class="named-content genus-species" id="named-content-1">Helicobacter pylori</span>
    Molecular Pathogenesis
    Identification of Pathogenicity Island Genes Associated with Loss of Type IV Secretion Function during Murine Infection with Helicobacter pylori

    Chronic Helicobacter pylori colonization in animal models often leads to downregulation of the type IV secretion system (T4SS), typically by recombination in cagY, which is an essential T4SS gene. However, 17 other cag pathogenicity island (cagPAI) genes, as well as some non-cagPAI genes, are also essential for T4SS function. To get...

    Lori M. Hansen, Dylan J. Dekalb, Lucy P. Cai, Jay V. Solnick
  • EirA Is a Novel Protein Essential for Intracellular Replication of <span class="named-content genus-species" id="named-content-1">Coxiella burnetii</span>
    Molecular Pathogenesis
    EirA Is a Novel Protein Essential for Intracellular Replication of Coxiella burnetii

    The zoonotic bacterial pathogen Coxiella burnetii is the causative agent of Q fever, a febrile illness which can cause a serious chronic infection. C. burnetii is a unique intracellular bacterium which replicates within host lysosome-derived vacuoles. The ability of...

    Miku Kuba, Nitika Neha, Patrice Newton, Yi Wei Lee, Vicki Bennett-Wood, Abderrahman Hachani, David P. De Souza, Brunda Nijagal, Saravanan Dayalan, Dedreia Tull, Malcolm J. McConville, Fiona M. Sansom, Hayley J. Newton
  • A Chemical Genetics Screen Reveals Influence of p38 Mitogen-Activated Protein Kinase and Autophagy on Phagosome Development and Intracellular Replication of <span class="named-content genus-species" id="named-content-1">Brucella neotomae</span> in Macrophages
    Cellular Microbiology: Pathogen-Host Cell Molecular Interactions
    A Chemical Genetics Screen Reveals Influence of p38 Mitogen-Activated Protein Kinase and Autophagy on Phagosome Development and Intracellular Replication of Brucella neotomae in Macrophages

    Brucella is an intracellular bacterial pathogen that causes chronic systemic infection in domesticated livestock and poses a zoonotic infectious risk to humans. The virulence of Brucella is critically dependent on its ability to replicate and survive within host macrophages. Brucella modulates host physiological pathways and cell biology in order to establish a productive intracellular replicative niche....

    Yoon-Suk Kang, James E. Kirby
  • <em>Brucella neotomae</em> Recapitulates Attributes of Zoonotic Human Disease in a Murine Infection Model
    Bacterial Infections
    Brucella neotomae Recapitulates Attributes of Zoonotic Human Disease in a Murine Infection Model

    Members of the genus Brucella are Gram-negative pathogens that cause chronic systemic infection in farm animals and zoonotic infection in humans. Study of the genus Brucella has been hindered by the need for biosafety level 3 select agent containment.

    Yoon-Suk Kang, Daniel A. Brown, James E. Kirby
  • Cellular Microbiology: Pathogen-Host Cell Molecular Interactions | Spotlight
    Brucella abortus Senses the Intracellular Environment through the BvrR/BvrS Two-Component System, Which Allows B. abortus To Adapt to Its Replicative Niche
    Pamela Altamirano-Silva, Jazmín Meza-Torres, Amanda Castillo-Zeledón, Nazareth Ruiz-Villalobos, Ana Mariel Zuñiga-Pereira, Carlos Chacón-Díaz, Edgardo Moreno, Caterina Guzmán-Verri, Esteban Chaves-Olarte
  • Cellular Microbiology: Pathogen-Host Cell Molecular Interactions
    Promotion and Rescue of Intracellular Brucella neotomae Replication during Coinfection with Legionella pneumophila
    Yoon-Suk Kang, James E. Kirby
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